TINJAUAN HASIL UJI MUTU BETON JEMBATAN DENGAN ALAT PALU BETON DAN PUNDIT (TEST RESULT REVIEW OF CONCRETE BRIDGE QUAHTY USING HAMMER TEST AND PUNDIT)

TINJAUAN HASIL UJI MUTU B E T O N JEMBATAN DENGAN A L A T P A L U BETON DAN PUNDIT

(TEST R E S U L T R E V I E W O F C O N C R E T E B R I D G E Q U A H T Y USING HAMMER TEST A N D PUNDIT)

N . R e t n o S e t i a t i P u s l i t b a n g J a l a n d a n J e m b a t a n J a l a n A . H . N a s u t i o n N o . 2 6 4 B a n d u n g 4 0 2 9 4

e-mail: retno.setiati@pusjatan.pu.go.id

D i t e r i m a : 1 4 M a r e t 2 U 1 4 ; d i r e v i s i : 1 4 M e i 2 0 1 4 ; disetujui: 3 0 M e i 2 0 1 4

A B S T R A K

P e n g u j i a n k u a t tekan beton dengan menggunakan a l a t palu beton ( H a m m e r Test) a d a l a h salah satu pengujian yang banyak d i l a k u k a n orang u n t u k mengetahui mutu suatu elemen struktur beton bertulang. P e n g u j i a n dengan

a l a t i n i sangat mudah d i l a k u k a n dan bersifat tidak merusak struktur bangunan yang sedang diuji. P a d a prinsipnya pengujian k u a t tekan dengan menggunakan a l a t palu d i g u n a k a n u n t u k mengetahui tingkat kekerasan

bagian p e r m u k a a n beton dan homogenitas suatu elemen struktur untuk keperluan pengendalian mutu beton di l a p a n g a n bagi perencana dan/atau pengawas pelaksanaan p e k e r j a a n . Beberapa faktor yang a k a n mempengaruhi hasil analisis d a r i pengujian dengan menggunakan a l a t i n i d i a n t a r a n y a a d a l a h kehalusan dan k e r a t a a n p e r m u k a a n bidang uji, a r a h t u m b u k a n , serta j u m l a h t i t i k yang diambil. O l e h k a r e n a i t u untuk menambah tingkat keyakinan terhadap hasil uji dengan a l a t palu i n i sebaiknya d i l a k u k a n j u g a pengujian k u a t tekan dengan menggunakan a l a t l a i n (misalnya dengan kecepatan rambat pulsa atau disingkat PUNDIT.

D a l a m tulisan ini, a k a n d i u r a i k a n tentang b a g a i m a n a membandingkan hasil pengujian k u a t tekan a n t a r a metoda palu beton dan PUNDIT. Berdasarkan hasil evaluasi dan pembahasan, n i l a i k u a t tekan beton eksisting dengan menggunakan palu beton a d a l a h identik dengan menggunakan a l a t PUNDIT. P a d a contoh struktur p i l a r , n i l a i k u a t tekan d a r i palu beton sebesar 3 3 9 , 5 6 kg/cm² berada pada rentang n i l a i k u a t tekan hasil pengujian PUNDIT (300—350) kg/cm'. P a d a struktur kepala jembatan, n i l a i k u a t tekan d a r i palu beton sebesar 2 5 6 , 5 5 kg/cm berada pada rentang n i l a i k u a t tekan hasil pengujian PUNDIT (250—300) kg/cm².

K a t a kunci: k u a t tekan, a n g k a pantul, palu beton, pundit, homogenitas

A B S T R A C T

Concrete compressive strength test using concrete hammer is one type of non destructive tests that widely used to investigate the quality of reinforced concrete stnictural element. This type of test is very simple to be done and i t has no influence to the b u i l d i n g structure which is being tested, The principle of the compressive concrete strength test using Schmidt H a m m e r to j i n d out the hardness of concrete surface part and homogeneity of the structural element for quality control assessment of concrete for engineering and/or supervisors' work Tfie factors that i n j l u e n c e the results of the analysis of the test hy using concrete hammer a r e : smoothness of surface

a r e a of concrete, direction of the testing impact, or the number of measured samples. Therefore to add confidence ofthe concrete hammer lest results, i t is recommended to carry out other compressive strength test using other tools such as PUNDIT. In this a r t i c i e , i t w i l l be explained how to carry out the compressive test procedure and how to analyze the compressive test results of the non destructive test. Tlie results have to be compared with other alternative testing to validate the f i n a l test results (PUNDIT). Based on the results, the compressive strength of concrete using concrete hammer is identical to using a PUNDIT. In the example of the pdlar structure, the compressive strength of 3 3 9 . 5 6 kg/citf is in the range ( 3 0 0 - 3 5 0 ) kg/cm² when using PUNDIT. At the abutment structure, the compressive strength of concrete hammer of 2 5 6 . 5 5 kg/cm² is in the range ofthe compressive strength test results by using P U N D I T ( 2 5 0 - 3 0 0 ) kg/cm².

Keywords: compression strength, reflected value, concrete hammer, pundit, homogeneity

Jumat Transportasi J a l a n . V o l u m e 0 1 N o . 1 J u n i 2 0 1 4 , 2 5 - 3 5 2 5

P E N D A H U L U A N K A J I A N P U S T A K A P e n g u j i a n e l e m e n s t r u k t u r b e t o n d e n g a n

m e n g g u n a k a n p a l u b e t o n {Schmidt H a m m e r ) d i l a k u k a n t a n p a m e r u s a k s t r u k t u r b e t o n y a n g d i p e r i k s a . H u b u n g a n a n t a r a a n g k a p a n t u l d a n k e k u a t a n b e t o n d i p e r o l e h d a r i s e j u m l a h b e s a r p e r c o b a a n p a l u b e t o n t e r h a d a p b e n d a u j i k u b u s , d i m a n a b e n d a u j i k u b u s y a n g d i u j i k u a t t e k a n n y a d e n g a n a l a t p a l u t e r s e b u t l a n g s u n g d i u j i p u l a d e n g a n m e n g g u n a k a n m e s i n t e k a n { U n i v e r s a l Testing M a c h i n e , UTKf) s a m p a i k u b u s i t u h a n c u r . U n t u k k u b u s d e n g a n m u t u n o r m a l , k e t i d a k p a s t i a n y a n g m e n y a n g k u t h u b u n g a n n i l a i k u a t t e k a n a n t a r a p a l u u j i d a n m e s i n t e k a n t i d a k m e n u n j u k k a n p e r b e d a a n y a n g s i g n i f i k a n .

M e n u r u t N c v i l l e ( 1 9 9 5 ) , p a d a k o n d i s i t e r t e n t u t e r k a d a n g k e k u a t a n b e t o n t i d a k d i s p e s i f i k a s i k a n d a l a m h u b u n g a n n y a d e n g a n t e g a n g a n (stress), m e l a i n k a n d i m a k s u d k a n u n t u k m e n d a p a t k a n h u b u n g a n k e k u a t a n b e t o n d e n g a n k e t a h a n a n ( b a i k t e r h a d a p k e a u s a n y a n g t i n g g i , e r o s i , a t a u p e n g a r u h c u a c a . U n t u k k a s u s i n i , t i n g k a t k e k e r a s a n d a r i p e r m u k a a n b e t o n (surface hardness) d i t e n t u k a n ( d i u k u r ) d e n g a n m e n g g u n a k a n p a l u b e t o n . H a l i n i m e r u p a k a n c a r a y a n g p a l i n g m u d a h d a r i p a d a d e n g a n m e n g a m b i l b e b e r a p a b e n d a u j i k u b u s u n t u k d i u j i t e k a n

M a k s u d d a r i t i n j a u a n i n i a d a l a h u n t u k m e n d a p a t k a n a c u a n d a n p e g a n g a n d a l a m m e l a k s a n a k a n p e n g u j i a n k e k e r a s a n p e r m u k a a n b e t o n d e n g a n m e n g g u n a k a n "alat p a l u .

S e d a n g k a n t u j u a n n y a a d a l a h u n t u k m e m p e r k i r a k a n n i l a i k u a t t e k a n p e r m u k a a n b e t o n p a d a u m u r t e r t e n t u d a n h o m o g e n i t a s p a d a s u a t u e l e m e n s t r u k t u r u n t u k k e p e r l u a n p e n g e n d a l i a n m u t u b e t o n d i l a p a n g a n b a g i p e r e n c a n a d a n / a t a u p e n g a w a s p e l a k s a n a a n p e k e r j a a n .

P e n g u j i a n h o m o g e n i t a s b e t o n e k s i s t i n g d i l a k u k a n p a d a p i l a r d a n k e p a l a j e m b a t a n . H a s i l u j i d e n g a n a l a t p a l u b e t o n d i b a n d i n g k a n d e n g a n a l a t k e c e p a t a n r a m b a t p u l s a .

B e r d a s a r k a n S N 1 0 3 - 4 4 3 0 - 1 9 9 7 ( B S N 1 9 9 7 ) , d e f i n i s i d a r i a l a t p a l u b e t o n (Schmidt H a m m e r ) a d a l a h s e j e n i s p a l u b e t o n y a n g d i g e r a k k a n o l e h g a y a p e g a s y a n g a p a b i l a d i l e p a s k a n a k a n m e m u k u l p e l u n c u r b a j a k e p e r m u k a a n b e t o n . A d a d u a j e n i s a l a t p a l u b e t o n y a n g b i a s a d i g u n a k a n u n t u k p e l a k s a n a a n p e k e r j a a n d i l a p a n g a n , y a i t u p a l u b e t o n t i p e N d a n t i p e N R . P a l u b e t o n t i p e N m e r u p a k a n a l a t u j i p a l u b e t o n y a n g d a p a t d i g u n a k a n u n t u k p e n g u j i a n s t r u k t u r b e t o n n o r m a l y a n g t i d a k d i l e n g k a p i d e n g a n a l a t p e n c a t a t d a t a ( r e c o r d e r ) . S e d a n g k a n p a l u b e t o n t i p e N R a d a l a h a l a t u j i p a l u b e t o n y a n g d a p a t d i g u n a k a n u n t u k p e n g u j i a n s t r u k t u r b e t o n n o r m a l d a n d i l e n g k a p i d e n g a n a l a t p e n c a t a t d a t a ( r e c o r d e r ) .

K e k e r a s a n p e r m u k a a n b e t o n y a n g d i u j i d e n g a n a l a t i n i d i n y a t a k a n d e n g a n n i l a i l e n t i n g , d i m a n a n i l a i l e n t i n g i n i a d a l a h n i l a i p e m b a c a a n y a n g d i t u n j u k k a n o l e h a l a t s e t e l a h p e l u n c u r b a j a m e m u k u l p e r m u k a a n b e t o n . P e r m u k a a n b e t o n y a n g a k a n d i u j i h a r u s m e r u p a k a n p e r m u k a a n y a n g p a d a t , r a t a , h a l u s , d a n t i d a k d i l a p i s i o l e h p l e s t e r a n a t a u b a h a n p e l a p i s l a i n n y a . B i d a n g u j i y a n g d i p i l i h h a r u s k e r i n g d a n h a l u s , b e b a s d a r i t o n j o l a n - t o n j o l a n a t a u l u b a n g - l u b a n g . L o k a s i - l o k a s i b i d a n g u j i h a r u s d i t e n t u k a n s e s u a i d e n g a n d i m e n s i e l e m e n s t r u k t u r d a n j u m l a h n i l a i u j i y a n g d i p e r l u k a n u n t u k p e r h i t u n g a n p e r k i r a a n k e k u a t a n b e t o n ( B S N 1 9 9 8 b ) .

I l u s t r a s i a l a t p a l u b e t o n s e p e r t i d i s a j i k a n p a d a G a m b a r 1 .

G a m b a r 1 . P a l u u j i b e t o n (Schmidt Hammer) T i p e N R

2 6

Tinjauan Hasil Uji Mitiu Beton Jembatan dengan Alat Palu Beton dan Pundi/ (N. Retno Seiiati)

A d a b e b e r a p a t a h a p a n y a n g h a r u s d i p e r h a t i k a n d a l a m m e n e n t u k a n n i l a i k u a t t e k a n p e r m u k a a n b e t o n d e n g a n a l a t p a l u b e t o n , y a i t u :

1 . M e m i l i h t i t i k - t i t i k y a n g a k a n d i u k u r , B i l a y a n g d i p e r i k s a a d a l a h b a g i a n s t r u k t u r y a n g t i p i s ( l e m b a r a n - l e m b a r a n d a n d i n d i n g - d i n d i n g y a n g t e b a l n y a k u r a n g d a r i 1 0 0 m m , k o l o m - k o l o m y a n g t e b a l n y a k u r a n g d a r i

1 3 0 m m ) m a k a h a r u s d i p e r h a t i k a n b a h w a h a s i l - h a s i l p e n g u k u r a n i t u m u n g k i n j u g a s a l a h a k i b a t p e n g a r u h e l a s t i s i t a s d a r i b e n t u k s t r u k t u r t e r s e b u t . D a l a m m e m i l i h t i t i k - t i t i k y a n g a k a n d i u k u r s e b a i k n y a m e n g h i n d a r i b a g i a n - b a g i a n s a m b u n g a n a t a u b a g i a n b e t o n y a n g k e r o p o s .

2 . M e n y i a p k a n t i t i k - t i t i k y a n g a k a n d i u k u r , b a g i a n p e r m u k a a n b e t o n y a n g t i d a k h a l u s d a p a t d i h a l u s k a n d e n g a n m e n g g u n a k a n b a t u a s a h c a r b o r u n d u m . P a d a b e t o n y a n g s u d a h l a p u k , l a p i s a n p e r m u k a a n n y a h a r u s d i b u a n g t e r l e b i h d a h u l u . L u a s p e r m u k a a n y a n g d i g e r i n d a h a r u s c u k u p m e w a k i l i u n t u k s e p u l u h k a l i p e n g u k u r a n d e n g a n l u a s p e r m u k a a n ( 1 0 0 x 1 0 0 ) m m

3 . J u m l a h t i t i k y a n g a k a n d i t e n t u k a n , b a n y a k n y a t i t i k y a n g d i t e n t u k a n d a p a t b e r j u m l a h l i m a a t a u s e p u l u h t i t i k ( l e b i h b a i k ) p a d a b a g i a n p e r m u k a a n y a n g t e l a h d i s i a p k a n . D a r i s e p u l u h t i t i k , a m b i l l a h h a r g a r a t a - r a t a n y a ( R ) . N i l a i r a t a - r a t a ( R ) d i a m b i l d a r i s e m u a h a s i l p e n g u k u r a n , k e c u a l i b i l a a d a h a s i l p e n g u k u r a n y a n g m e n y i m p a n g j a u h . U n t u k h a s i l p e n g u k u r a n y a n g m e n y i m p a n g j a u h h a r u s d i g a n t i d e n g a n p e n g u k u r a n t a m b a h a n . S e b a g a i p e g a n g a n , h a s i l p e n g u k u r a n y a n g h a r u s d i g a n t i a d a l a h y a n g p e n y i m p a n g a n n y a l e b i h d a r i 5 s a t u a n s k a l a , d a r i h a r g a r a t a - r a t a y a n g d i d a p a t . B e r d a s a r k a n p e n g a l a m a n , h a s i l p e n g u k u r a n y a n g m e n y i m p a n g i n i b i a s a n y a d i a k i b a t k a n o l e h t u m b u k a n y a n g m e n g e n a i p a r t i k e l a g r e g a t a t a u m e n g e n a i d a e r a h p o r o u s y a n g d e k a t k e p e r m u k a a n b e t o n . H a r g a r a t a - r a t a R i n i d i s e b u t a n g k a p a n t u l .

4 . M e n e n t u k a n n i l a i k u a t t e k a n , h a r g a y a n g p a l i n g m u n g k i n ( a^{r a}) d a n h a r g a m i n i m u m (o"min) d a r i k u a t t e k a n k u b u s (cube compressive strength) d a l a m s a t u a n k g / c m² d i b e r i k a n d a l a m T a b e l 1 . N i l a i r a t a - r a t a R d i h i t u n g s a m p a i d e n g a n k e t e l i t i a n Yi s a t u a n s k a l a , s e d a n g k a n h a r g a c d i b u l a t k a n s a m p a i d e n g a n k g / c m² t e r d e k a t . U m u r b e t o n 1 4 s a m p a i 5 6 h a r i u n t u k p e r m u k a a n b e t o n y a n g h a l u s d a n k e r i n g .

T a b e l 1. N i l a i k u a t t e k a n k u b u s sebagai f u n g s i d a r i a n g k a p a n t u l (R)

Umur Beton

R 14 sampai 56 hari 7 hari

R

<7m a^{f f l}

20 101 54 121 74

21 113 64 132 83

22 126 75 145 94

23 139 86 157 104

24 152 98 169 115

25 166 110 183 127

26 180 122 196 138

27 195 135 210 150

28 210 149 225 164

29 225 163 239 177

30 241 178 254 191

31 257 193 269 205

32 274 209 285 220

33 291 225 300 234

34 307 240 315 248

35 324 256 331 263

36 342 273 348 279

37 360 290 365 295

38 377 307 381 311

39 395 324 398 327

40 413 341 416 344

41 432 359 434 361

42 450 377 451 378

43 469 395 470 396

44 488 414 488 414

45 507 432 507 432

46 526 451 • 526 451

47 546 470 546 470

48 565 489 565 489

49 584 508 584 508

50 604 527 604 527

51 623 546 623 546

52 643 565 643 565

53 663 584 663 584

54 683 603 683 603

55 703 622 703 622

Catatan kuat tekan silinder = 0,85 x kuat tekan kubus

J u r n a l Transportasi J a t a n . V o l u m e O l N o . 1 J u n i 2 0 1 4 , 2 5 - 3 5 2 7

A p a b i l a b i d a n g y a n g d i p e r i k s a i t u m i r i n g a t a u d a t a r , m a k a h a s i l p e m b a c a a n h a r u s d i l a k u k a n k o r e k s i . B e s a r n y a k o r e k s i t e r h a d a p a n g k a p a n t u l R ^a t e r g a n t u n g p a d a b e s a r n y a s u d u t k e m i r i n g a n ( T a b e l 2 ) .

T a b e l 2 . K o r e k s i terhadap p e n u n j u k k a n p a l u p e n g u j i u n t u k a r a h t u m b u k a n y a n g t i d a k h o r i z o n t a l

K o r e k s i

T u m b u k a n k g a t a s T u m b u k a n k e b a w a h

a ct = +90° a = +45" a = -45° a = -90"

10 ^_ +2,4 +3,2

20 -5,4 -3,5 +2,5 +3,2

30 -4,7 -3,1 +2,3 +3,1

40 -2,6 +2,0 +2,7

50 -3,1 -2,1 + 1.6 +2,2

60 -2,3 -1,6 + 1,3 +1,7

H a l - h a l y a n g h a r u s d i p e r h a t i k a n d a l a m p e n g u j i a n k u a t t e k a n b e t o n d e n g a n m e n g g u n a k a n p a l u u j i d i a n t a r a n y a :

1 . B i l a b e t o n t e r b u a t d a r i a g r e g a t y a n g t i d a k k u a t , r i n g a n , a t a u m e m p u n y a i s i f a t m u d a h t e r b e l a h ( b a t u a p u n g , p e c a h a n b a t u b a t a , d a n s e b a g a i n y a ) m a k a k e k u a t a n y a n g d i p e r o l e h a k a n l e b i h k e c i l . A n g k a p a n t u l h a n y a t e r g a n t u n g p a d a k e k u a t a n d a r i a d u k a n .

2 . B i l a b e t o n d i b u a t d e n g a n j u m l a h p a s i r y a n g k u r a n g , d a n p e n g e r j a a n n y a k u r a n g s e m p u r n a , m a k a d a l a m b e t o n d a p a t t e r j a d i p o l a s a r a n g l e b a h {honeyeombing). P o l a i n i t i d a k n a m p a k d a r i l u a r , d a n d a p a t m e n u r u n k a n k e k u a t a n b e t o n s e m e n t a r a a n g k a p a n t u l a n n y a t i d a k b e r u b a h .

3 . D e n g a n m a k i n t u r u n n y a k u a l i t a s b e t o n , s e b a i k n y a h a r u s b e r h a t i - h a t i m a n a k a l a h a r g a a n g k a p a n t u l R d i b a w a h 3 0 . U n t u k k a s u s y a n g k r i t i s s e b a i k n y a j a n g a n h a n y a m e n g a n d a l k a n p e n g u j i a n d e n g a n a l a t p a l u b e t o n s a j a , t e t a p i j u g a h a r u s b e r p e g a n g p a d a s e k u r a n g - k u r a n g n y a , d u a a t a u t i g a k u b u s / s i l i n d e r y a n g d i a m b i l d a r i s t r u k t u r y a n g d i p e r i k s a .

L a n d a s a n u j i d i p a k a i u n t u k m e m e r i k s a b a i k t i d a k n y a p a l u p e n g u j i . L a n d a s a n u j i h a r u s d i l e t a k k a n d i a t a s p e n a h a n y a n g k o k o h . B a g i a n y a n g m e n e r i m a t u m b u k a n p e l u n c u r b a j a a d a l a h b i d a n g d a t a r h a s i l p e n g g e r i n d a a n .

P a d a p e r c o b a a n t u m b u k a n t e r h a d a p l a n d a s a n u j i , p e n u n j u k k a n p a l u T i p e N h a r u s d i a n t a r a 7 8 s a m p a i 8 2 . S e t i a p p a l u p e n g u j i h e n d a k n y a s e l a l u d i p e r i k s a d e n g a n l a n d a s a n u j i s e c a r a t e r a t u r .

B i l a p a d a l a n d a s a n u j i i t u d e n g a n p a n t u l ( R^a) m e n y i m p a n g s a m p a i l e b i h b e s a r d a r i n i l a i n o m i n a l 8 0 , m a k a a n g k a R y a n g d i d a p a t p a d a p e m e r i k s a a n b e t o n m e n j a d i t i d a k a k u r a t , d e n g a n p r o s e n t a s i k e t i d a k a k u r a t a n y a n g s e b a n d i n g . D a l a m h a l i n i p e n i l a i a n h a s i l p e n g u j i a n h a r u s d i t e n t u k a n d e n g a n r u m u s :

R

= ^L™

( D

n R ^a

K e t e r a n g a n :

n a d a l a h j u m l a h p e n g u k u r a n p a d a b e t o n R^a a d a l a h a n g k a p a n t u l y a n g d i d a p a t p a d a p e m e r i k s a a n d e n g a n l a n d a s a n u j i .

R u m u s t e r s e b u t d a p a t d i p a k a i u n t u k n i l a i R ^a s a m p a i 7 2 . D i b a w a h R ^{a =} 7 2 , i n s t r u m e n u k u r h a r u s d i b e r s i h k a n u n t u k k e m u d i a n d i k a l i b r a s i k e m b a l i .

K a l a u s e k i r a n y a t i d a k a d a l a n d a s a n u j i y a n g d a p a t d i p a k a i , m a k a t i a p p a l u p e n g u j i s e k u r a n g - k u r a n g n y a h a r u s d i p e r i k s a d e n g a n c a r a m e m b a n d i n g k a n n y a d e n g a n h a s i l p e m b a c a a n p a l u p e n g u j i y a n g b a r u d i - s t e l . P e n g u j i a n - p e n g u j i a n t u m b u k a n u n t u k t u j u a n m e m b a n d i n g k a n t e r s e b u t h e n d a k n y a d i l a k u k a n t e r h a d a p o b j e k y a n g p e r m u k a a n n y a s e k e r a s m u n g k i n . M i s a l n y a t e r h a d a p l a n d a s a n t e m p a t p a n d a i b e s i , a t a u t e r h a d a p b l o k a l a m y a n g h o m o g e n , k e r a s , d a n b e r a t d e n g a n p e r m u k a a n y a n g s u d a h d i g e r i n d a t e r l e b i h d a h u l u .

P e n g u j i a n c e p a t r a m b a t a t a u d i k e n a l d e n g a n Portable Ultrasomc D i g i t a l Jndicating Test ( P U N D I T ) m e r u p a k a n p e n g u j i a n t i d a k m e r u s a k y a n g b e r t u j u a n u n t u k m e m p e r k i r a k a n h o m o g e n i t a s b e t o n p a d a k o m p o n e n s t r u k t u r . M e t o d e p e n g u j i a n m e n g a c u p a d a S N I 0 3 - 4 8 0 2 - 1 9 9 8 ( B S N I 9 9 8 a ) . P r i n s i p k e r j a p e n g u j i a n d e n g a n P U N D I T a d a l a h m e n g u b a h e n e r g i g e l o m b a n g l i s t r i k y a n g d i b a n g k i t k a n o l e h p e m b a n g k i t p u l s a transducer p e n g i r i m / transmiiter ( T ) m e n j a d i e n e r g i g e l o m b a n g m e k a n i k y a n g s e l a n j u t n y a m e r a m b a t p a d a b e t o n . S e t e l a h s a m p a i p a d a transducer p e n e r i m a / receiver ( R ) e n e r g i g e l o m b a n g t a d i 2 8

Tinjauan Hasil Uji Mutu Beton Jembatan dengan Alat Palu Beton dan Pundit (N. RePw Seriali)

d i u b a h k e m b a l i m e n j a d i e n e r g i g e l o m b a n g l i s t r i k y a n g s e l a n j u t n y a m e l e w a t i p e n g u a t d a n a k h i r n y a d i h i t u n g / d i t a m p i l k a n d a l a m s a t u a n w a k t u t e m p u h . P e n g u k u r a n k e c e p a t a n r a m b a t g e l o m b a n g ultrasonic p a d a b e t o n d i n y a t a k a n d e n g a n p e r s a m a a n :

v = ± ( 2 )

r K e t e r a n g a n :

v = k e c e p a t a n r a m b a t g e l o m b a n g ultrasonic ( k m / d e t i k )

L = j a r a k t e m p u h ( m m )

T = w a k t u t e m p u h g e l o m b a n g ultrasonic ( d e t i k )

P e n g u j i a n n i l a i k u a t t e k a n b e t o n s e l a i n d e n g a n a l a t p a l u b e t o n d a n P U N D I T , d a p a t j u g a d i l a k u k a n d e n g a n m e n g g u n a k a n a l a t

Windsor Probe. A l a t i n i m e r u p a k a n s e b u a h a l a t t e m b a k y a n g d i d e s a i n k h u s u s u n t u k m e n e m b a k k a n s e b u a h b a t a n g b e s i {probe) s a m p a i m e n e m b u s k e d a l a m b e t o n . K e d a l a m a n p e n e t r a s i d a r i b a t a n g b e s i t e r s e b u t m e n g i n d i k a s i k a n n i l a i k e k u a t a n b e t o n y a n g d i u j i . M e t o d e i n i h a m p i r s a m a d e n g a n hammer test, y a n g m e m b e d a k a n a d a l a h g a y a impaet ( t u m b u k a n ) probe t e r h a d a p b e t o n l e b i h b e s a r d a r i p a d a phmger p a d a hammer test.

( h t t p : / / e p r i n t s . u n d i p . a c . i d / 3 4 3 4 5 / 7 / 2 1 7 8 _ C H A P T E R _ l l I . p d f , T u g a s A k h i r " P e r e n c a n a a n D e r m a g a B o n g k a r B a t u b a r a P L T U C i l a c a p " ) .

M E T O D O L O G I

M e t o d o l o g i y a n g d i l a k u k a n d a l a m p e n g u j i a n k u a t t e k a n d e n g a n c a r a n o n d e s t r u k t i f (Schmidt H a m m e r Test) i n i h a r u s m e m p e r h a t i k a n k e t e n t u a n - k e t e n t u a n d a n c a r a u j i y a n g b e n a r , p e n g u k u r a n n i l a i l e n t i n g d e n g a n a l a t p a l u b e t o n , d a n p e r k i r a a n b e s a r n y a k u a t t e k a n b e t o n p a d a s t r u k t u r b e r d a s a r k a n b e n d a u j i k u b u s a t a u s i l i n d e r . L a n g k a h - l a n g k a h p e r s i a p a n p e n g u j i a n y a n g h a r u s d i l a k u k a n a d a l a h :

1 . M e n e n t u k a n l o k a s i b i d a n g u j i p a d a e l e m e n s t r u k t u r y a n g a k a n d i p e r i k s a d a n d i b e r i t a n d a b a t a s y a n g j e l a s .

2 . M e m b e r s i h k a n p e r m u k a a n b i d a n g u j i d a r i p l e s t e r a n a t a u p e l a p i s p e l i n d u n g l a i n n y a . 3 . M e r a t a k a n p e r m u k a a n b i d a n g u j i d e n g a n

g e r i n d a .

A r a h p u k u l a n p a d a s a t u l o k a s i b i d a n g u j i h a r u s s a m a . P a d a p e n g u j i a n d e n g a n a r a h p u k u l a n t i d a k h o r i s o n t a l , n i l a i l e n t i n g r a t a - r a t a h a r u s d i k o r e k s i d e n g a n n i l a i i n k l i n a s i s e s u a i d e n g a n p e t u n j u k p e n g g u n a a n a l a t p a l u u j i y a n g b e r s a n g k u t a n . K u a t t e k a n d i p e r k i r a k a n b e r d a s a r k a n n i l a i l e n t i n g a n y a n g d i p e r o l e h a t a u y a n g t e l a h d i k o r e k s i n i l a i i n k l i n a s i n y a d e n g a n m e n g g u n a k a n t a b e l a t a u k u r v a k o r e l a s i p a d a p e t u n j u k p e n g g u n a a n a l a t p a l u b e t o n y a n g d i p a k a i m e n g u j i .

M e t o d e u j i d e n g a n P U N D I T p a d a p r i n s i p n y a m e m a n f a a t k a n r a m b a t a n g e l o m b a n g p a d a m e d i u m t e r t e n t u ( d a l a m h a l i n i e l e m e n b e t o n ) . J i k a Schmidt H a m m e r b e r b a s i s a n a l o g d a n m e n g a n d a l k a n k i n e r j a m e k a n i s ( p a n t u l a n m a s s a ) , m a k a P U N D I T m e r u p a k a n p e r a l a t a n e l e k t r o n i s . C a r a k e r j a p e r a l a t a n i n i a d a l a h d e n g a n m e n e m p e l k a n u n i t s e n s o r k e p e r m u k a a n b e t o n , y a n g a k a n m e m a n c a r k a n g e l o m b a n g d a r i transmitter m e n u j u k e receiver. S a a t u n i t s e n s o r d i t e m p e l k a n k e p e r m u k a a n b e t o n , h a r u s t e r j a d i k o n t a k y a n g s e m p u r n a a n t a r a k e d u a n y a a g a r g e l o m b a n g b i s a m e r a m b a t s e m p u r n a . K a r e n a b e t o n d a n u n i t s e n s o r s a m a - s a m a b e r s i f a t p a d a t / k e r a s , m a k a k e m u n g k i n a n a k a n t e r d a p a t c e l a h / r o n g g a a n t a r a k e d u a n y a . O l e h s e b a b i t u d i g u n a k a n m e d i u m g e l ( m i s a l m e m a k a i grease/vasclin) y a n g n a n t i n y a m e n j a d i p e r a n t a r a d a n m e m a s t i k a n b a h w a t e r j a d i k o n t a k s e m p u r n a a n t a r a k e d u a b i d a n g p e r m u k a a n ( b e t o n d a n u n i t s e n s o r ) . S e d a n g k a n s i l i n d e r m e t a l / b e s i d i g u n a k a n u n t u k k a l i b r a s i a l a t s e b e l u m d i g u n a k a n d e n g a n m e m p e r t i m b a n g k a n s i f a t b e s i y a n g c e n d e r u n g h o m o g e n m a t e r i a l n y a .

P e n e m p a t a n u n i t s e n s o r b e r d a s a r k a n G a m b a r 2 t e r d i r i d a r i :

a. D i r e c t ( u n i t s e n s o r p a d a p e r m u k a a n y a n g s a l i n g b e r l a w a n a n .

Jumat Transportasi J a l a n . V o l u m e 0 1 N o . 1 J u n i 2 0 1 4 , 2 5 3 5 2 9

b . Semi-direct ( u n i t transmiter d a n receiver s a l i n g t e g a k l u r u s ) .

c. I n d i r e c t ( s e n s o r p a d a p e r m u k a a n y a n g s a m a ) .

v --c

C » - " i ^•y' V :

• v - ^ ' i * - • > ? G a m b a r 2 . P e n e m p a t a n u n i t sensor

M e t o d e direct a d a l a h y a n g p a l i n g a k u r a t , - s e d a n g k a n m e t o d e l a i n a k a n m e m b u t u h k a n k o r e k s i .

D e n g a n m e n g e t a h u i j a r a k a n t a r a d u a u n i t s e n s o r t e r s e b u t ( y a n g m e m e n u h i b a t a s a n m i n i m u m ) d a n w a k t u r a m b a t g e l o m b a n g ( d a r i b a c a a n display), b i s a d i p e r o l e h k e c e p a t a n r a m b a t g e l o m b a n g p a d a b e t o n y a n g d i u j i / d i a m a t i .

P e m a n f a a t a n d a t a k e c e p a t a n r a m b a t g e l o m b a n g i n i b i s a b e r v a r i a s i . T u n t u t a n y a n g p a l i n g d i i n g i n k a n a d a l a h k o r e l a s i d e n g a n k e k u a t a n b e t o n ( n i l a i k u a t t e k a n ) . H a l l a i n , m a t e r i a l b e t o n b e r s i f a t h e t e r o g e n d a l a m s u d u t p a n d a n g m e d i u m p e r a m b a t a n , k a r e n a t e r d i r i d a r i k e r i k i l / a g r e g a t ( b i s a b e r v a r i a s i m a c a m d a n u k u r a n n y a ) d a n p a s t a s e m e n , s e l a i n i t u j u g a t e r g a n t u n g d a r i c a m p u r a n n y a . C a m p u r a n b e t o n y a n g s a t u d e n g a n l a i n n y a ( w a l a u p u n d e n g a n k u a t t e k a n r e l a t i f s a m a ) b e l u m t e n t u d a p a t

m e n g h a s i l k a n b a c a a n y a n g s a m a , a p a l a g i j i k a m e m p e r t i m b a n g k a n f a k t o r k o n d i s i l i n g k u n g a n d a n u m u r b e t o n d i l a p a n g a n . F a k t o r l a i n a d a l a h a d a n y a p e n g a r u h t u l a n g a n ( m e d i u m r a m b a t a n g e l o m b a n g m e n j a d i b e r u b a h ) d a n a d a n y a r e t a k a n .

P a d a d a e r a h r e t a k a n g e l o m b a n g a k a n m e r a m b a t m e l a l u i u d a r a ( m e d i u m b e r b e d a ) , y a n g a k a n m e n g a k i b a t k a n p e r u b a h a n w a k t u t e m p u h d a n a k h i r n y a m e n g h a s i l k a n k e c e p a t a n r a m b a t y a n g b e r b e d a . D e n g a n m e m b a n d i n g k a n d e n g a n k e c e p a t a n r a m b a t d i l o k a s i t a n p a r e t a k a n , m a k a b i s a d i l o k a l i s i r t e m p a t y a n g

d i d u g a t e r d a p a t r e t a k a n , t e r m a s u k p u l a p e r k i r a a n k e d a l a m a n r e t a k a n .

M a k a l a h i n i a d a l a h t i n j a u a n h a s i l p e n g u j i a n k e k u a t a n b e t o n d e n g a n a l a t p a l u b e t o n (Schmidt Hammer) d a n a l a t k e c e p a t a n p u l s a ( P U N D I T ) . P e n g u j i a n k u a t t e k a n d i l a k u k a n p a d a s t r u k t u r p i l a r j e m b a t a n d a n k e p a l a j e m b a t a n . D a l a m p e n g u j i a n k u a t t e k a n d e n g a n m e n g g u n a k a n a l a t Schmidt H a m m e r d i a m b i l s e b a n y a k 3 0 t i t i k y a n g d i a n g g a p d a p a t m e w a k i l i k e k u a t a n p a d a p i l a r m a u p u n k e p a l a j e m b a t a n . H a s i l t e r s e b u t k e m u d i a n d i b a n d i n g k a n d e n g a n p e n g u j i a n k u a t t e k a n y a n g m e n g g u n a k a n a l a t k e c e p a t a n p u l s a ( P U N D I T ) . P e n g u j i a n k u a t t e k a n d e n g a n a l a t k e c e p a t a n p u l s a ( P U N D I T ) i n i d i a m b i l s e b a n y a k 2 0 t i t i k y a n g d i a n g g a p d a p a t m e w a k i l i p a d a s t r u k t u r y a n g a k a n d i u j i ( p i l a r d a n k e p a l a j e m b a t a n ) .

G a m b a r 3. Pengujian m u t u beton dengan alat k e c e p a t a n p u l s a ( P U N D I T )

H A S I L D A N A N A L I S I S

H a s i l p e n g u j i a n k u a t t e k a n d e n g a n m e n g g u n a k a n a l a t Schmidt H a m m e r d a n k e c e p a t a n p u l s a p a d a s t r u k t u r p i l a r d a n k e p a l a j e m b a t a n d a p a t d i l i h a t d a l a m T a b e l 3 s a m p a i

d e n g a n T a b e l 6 .

A n a l i s i s p e r h i t u n g a n u n t u k p e n g u j i a n k u a t t e k a n d e n g a n a l a t Schmidt H a m m e r p a d a s t r u k t u r p i l a r t e r d i r i d a r i b e b e r a p a t a h a p a n s e b a g a i b e r i k u t :

L S e t e l a h d i p e r o l e h d a t a h a s i l l i m a k a l i t u m b u k a n p a d a m a s i n g - m a s i n g t i t i k d i h i t u n g l a h n i l a i r a t a - r a t a n y a ( / ? - ) , d e n g a n r u m u s :

30

Tinjauan Hasil Uji.Mutu Beton Jembatan dengan Alat Palu Beton dan Pundit (N. Retno Seriali)

R - = • ( 3 ) K e t e r a n g a n :

R. = n i l a i r a t a - r a t a a n g k a p a n t u l u n t u k s e t i a p t i t i k

Y^R ⁼ j u m l a h a n g k a p a n t u l u n t u k s e t i a p t i t i k

2 . U n t u k a r a h t u m b u k a n d e n g a n s u d u t o = 0°

( a r a h h o r i z o n t a l ) u n t u k m a s i n g - m a s i n g t i t i k a k a n d i p e r o l e h n i l a i f a k t o r k o r e k s i = 1 s e h i n g g a n i l a i p a n t u l y a n g d i a m b i l ( R ) u n t u k s e t i a p t i t i k a d a l a h n i l a i p a n t u l r a t a - r a t a n y a .

3 . B i l a n i l a i p a n t u l ( R ) y a n g d i p e r o l e h d a r i t a h a p a n 2 t e r s e b u t d i k o n v e r s i k a n k e d a l a m k u a t t e k a n k u b u s ( T a b e l 1 ) m a k a a k a n d i d a p a t m a s i n g - m a s i n g n i l a i k u a t t e k a n ( c i^b) u n t u k s e t i a p t i t i k .

4 . H i t u n g n i l a i r a t a - r a t a k u a t t e k a n ( a^{b n ]}) u n t u k s e m u a t i t i k d e n g a n r u m u s s e b a g a i b e r i k u t :

2 > .

N a d a l a h j u m l a h t i t i k

5 . H i t u n g s t a n d a r d e v i a s i ( s ) d e n g a n r u m u s s e b a g a i b e r i k u t :

s = ( 5 )

( 4 )

tt-1

6 . U n t u k j u m l a h t i t i k n a d a l a h 3 0 , f a k t o r k o r e k s i ( r ) t e r h a d a p s t a n d a r d e v i a s i ( s ) a d a l a h s a t u ( 1 ) s e h i n g g a d i p e r o l e h n i l a i k u a t t e k a n k a r a k t e r i s t i k b e t o n ( < r^bk ) s e b a g a i b e r i k u t :

Obk = o^{b m}- ( r ) ( l , 6 4 ) ( s ) ( 6 )

U n t u k f a k t o r k o r e k s i ( r ) d i a m b i l = 1

a^bk = r j^{b m}- ( l , 6 4 ) ( s ) ( 7 )

7 . N i l a i k u a t t e k a n k a r a k t e r i s t i k b e t o n ( a^{b k}) y a n g d i d a p a t d a r i t a h a p a n 6 t e r s e b u t k e m u d i a n d i b a n d i n g k a n t e r h a d a p n i l a i p e n g u j i a n k u a t t e k a n y a n g m e n g g u n a k a n a l a t k e c e p a t a n p u l s a ( P U N D I T ) .

S e s u a i d a t a D i a g r a m n i l a i k u a t t e k a n b e t o n d e n g a n a l a t p a l u b e t o n p a d a s t r u k t u r p i l a r j e m b a t a n p a d a T a b e l 3 d i s a j i k a n j u g a d a l a m b e n t u k d i a g r a m , y a i t u s e p e r t i d i s a j i k a n p a d a G a m b a r 4 .

K e t e r a n g a n :

O b m a d a l a h n i l a i r a t a - r a t a k u a t t e k a n b e t o n JVA a d a l a h j u m l a h n i l a i k u a t t e k a n

T a b e l 3 . H a s i l p e n g u j i a n p i l a r j e m b a t a n d e n g a n a l a t Schmidt Hammer

T V o . 1

A n R k 2

a P a n t u l

3 4 5 — r a t a - r a ( H f » M u r

k < i r f k s i

N i l a i

P a n U i l ° b

k e / c m² k e / c m¹

< O f e - < W >^J

1 3 8 3 8 3 8 3 8 3 8 3 B . ( M l 1 3 8 . 0 0 3 7 7 . 0 0 3 . 2 6 1 4 1 . 6 3

2 4 f t 3 9 4 0 3 9 3 9 3 9 . 4 0 1 3 9 . 4 0 3 9 9 . 7 7 2 6 . 0 3 6 7 7 . 7 1

3 3 6 4 0 4 0 3 8 4 0 3 8 . 8 0 ^] 3 S . K O 3 8 9 . 0 2 1 5 . 2 8 2 3 3 . 3 8

4 3 6 3 6 3!» 3 6 3 7 3 6 . 8 0 1 3 6 - 8 0 3 5 3 . 6 1 - 2 0 . 1 3 4 0 5 . 1 3

S 3 6 3 4 3 4 3 8 3 6 3 5 . 6 O 1 3 5 . 6 0 3 3 2 . 7 3 - 4 1 . m 1 6 8 1 . 9 2

6 3 8 3 8 4 0 4 0 4 0 3 9 . 2 0 1 3 9 . 2 0 3 9 6 . 1 8 2 2 . 4 4 5 0 3 . 5 9

7 3 6 3 8 3 7 3 7 3 6 3 6 . S O 1 3 6 . H O 3 5 3 . 6 1 - 2 0 . 1 3 4 0 5 . 1 3

8 4 0 3 8 3 6 3 8 4 0 3 8 . 4 » 1 3 8 . 4 0 3 8 1 . 8 8 8 . 1 4 6 6 . 2 5

9 3 6 3 6 3 6 3 8 4 0 3 7 . 2 0 1 3 7 . 2 0 3 6 0 . 6 4 - 1 3 . 1 0 1 7 1 . 7 3

l O 3 6 3 K 3 8 3 6 3 8 3 7 . 2 0 1 3 7 . 2 0 3 6 0 . 6 4 - 1 3 . 1 O 1 7 1 . 7 3

1 1 4 0 3 8 3 8 4 0 4 8 4 0 . K O 1 4 0 . 8 0 4 2 5 . 0 9 5 1 . 3 5 2 6 3 7 . 1 3

1 2 3 6 3 8 3 6 3 6 4 < l 3 7 . 2 0 1 3 7 . 2 0 3 6 0 . 6 4 - 1 3 . 1 0 1 7 1 . 7 3

1 3 3 5 3 5 3 5 3 6 3 8 3 5 . 8 < l • 3 5 . 8 0 3 3 6 . 1 9 - 3 7 . 5 5 1 4 1 0 . 0 3

1 4 3 7 3 8 4 0 3 6 3 8 3 7 . 8 0 1 3 7 . 8 0 3 7 1 . 2 3 - 2 . 5 1 6 . 3 2

1 5 3 7 3 6 3 7 3 R 4 0 3 7 . 6 0 1 3 7 . 6 0 3 6 7 . 6 9 - 6 . 0 5 3 6 . 6 3

I 6 3 6 3 7 4 0 4 2 3 6 3 8 . 2 0 I 3 8 . 2 0 3 7 8 . 3 2 4 . 5 8 2 0 . 9 9

1 7 3 8 3 8 3 9 4 2 3 9 3 9 . 2 0 1 3 9 . 2 0 3 9 6 . 1 8 2 2 . 4 4 5 0 3 . 5 9

1 8 4 0 4 1 3 8 3 8 3 6 3 8 . 6 0 1 3 S . G O 3 8 5 . 4 4 1 1 . 7 1 1 1 3 7 . 0 0

1 9 3 6 3 6 3 8 4 1 4 0 3 8 . 2 0 1 3 8 . 2 0 3 7 8 . 3 2 4 . 5 8 2 0 . 9 9

2 0 3 8 3*» 3 9 4 2 3 9 3 9 . 4 0 1 3 9 . 4 1 ) 3 9 9 . 7 7 2 6 . 0 3 6 7 7 . 7 1

2 1 4 2 3 8 4 0 3 6 3 6 3 8 . 4 0 1 3 8 . 4 0 3 8 1 . 8 8 8 . 1 4 6 6 . 2 5

2 2 3 6 3 6 4 1 4 0 3 8 3 S . 2 0 1 3 8 . 2 1 ) 3 7 8 . 3 2 4 . 5 8 2 0 . 9 9

2 . 1 3 6 3 6 3 8 4 0 3 9 3 7 . 8 0 1 3 7 - S O 3 7 1 . 2 3 - 2 . 5 1 6 . 3 2

2 4 3 9 3*» 3 6 3 6 4 0 3 H . O O 1 3 K . I I » 3 7 7 . 0 0 3 . 2 6 1 0 . 6 3

2 5 3 6 3 7 3 6 3 S 4 0 3 6 . 8 0 1 3 6 . 8 0 3 5 3 . 6 1 - 2 0 . 1 3 4 < 1 5 . 1 3

2 6 3 6 3 6 4 0 3 6 3 9 3 7 . 4 0 ^] 3 7 . 4 0 3 6 4 . 1 6 - 9 . S S 9 1 . 8 2

2 7 3 9 4 0 4 0 3 9 4 0 3 9 . 6 0 1 3 9 . 6 0 4 0 3 . 3 7 2 9 . 6 3 S 7 R . 0 1

2 8 4 0 4 0 3 6 3 6 3 9 3 8 . 2 0 1 3 8 . 2 0 3 7 8 . 3 2 4 . 5 8 2 0 . 9 9

2 9 3 6 3 6 3 6 3 8 3 8 3 6 . 8 0 1 3 6 . 8 0 3 5 3 . 6 1 - 2 0 . 1 3 4 0 5 . 1 3

3 0 3 6 3 6 3 6 3 6 3 8 3 6 . 4 0 1 3 6 . 4 n 3 4 6 . 6 2 - 2 7 . 1 2 7 3 5 . 5 2

• l u m l a h 1 1 2 1 2 . 0 6 1 2 5 9 0 . 1 4

J u r n a l Transportasi J a l a n . V o l u m e 0 1 N o . 1 J u n i 2 0 1 4 , 2 5 - 3 5

31

K u a t T e k a n ( k g f c m 2 ) 4 5 0 . 0 0 T 4 0 0 . 0 0 3 5 0 . 0 0 3 0 0 . 0 0 2 5 0 . 0 0 2 0 0 . 0 0 1 5 0 . 0 0 1 0 0 . 0 0 5 0 . 0 0 0 . 0 0

IIIIIIIIIIIIII IIII i n i

I I I I I I I I I I I I I I I I I I I I h i u in

iiiiiiiiniiiiiiiiiiiiiiiiiii

I i i i i i i i

I I I I I I I I I I

iiiiiiiiiniiiiiiiiiiiiiiiiiii

G a m b a r 4 . D i a g r a m n i l a i k u a t t e k a n b e t o n d e n g a n alat p a l u b e t o n p a d a s t r u k t u r p i l a r j e m b a t a n B e r d a s a r k a n d a t a p a d a T a b e l 3 d a n

m e n g g u n a k a n P e r s a m a a n 4 d i p e r o l e h n i l a i O b . m s e b e s a r 3 7 3 , 7 4 k g / c m², s t a n d a r d e v i a s i ( s ) s e s u a i P e r s a m a a n 5 a d a l a h s e b e s a r 2 0 , 8 4 d a n k u a t t e k a n k a r a k t e r i s t i k b e t o n ( a^{b k}) s e s u a i P e r s a m a a n 6 a d a l a h s e b e s a r 3 3 9 , 5 6 k g / c m².

H a s i l p e n g u j i a n d e n g a n m e n g g u n a k a n a l a t P U N D I T d a p a t d i l i h a t p a d a T a b e l 4 . B e r d a s a r k a n T a b e l 4 d i p e r o l e h n i l a i V r =

T a b e l 4 . H a s i l p e m e r i k s a a n k e c e p a t a n r a m b a t d e n g a n a l a t P U N D I T p a d a s t r u k t u r p i l a r j e m b a t a n X N / n , y a i t u s e b e s a r 4 , 1 1 k m / s > 4 k m / s , s e h i n g g a a ^b = ( 3 0 0 - 3 5 0 ) k g / c m²

H a s i l p e n g u j i a n k u a t t e k a n d e n g a n a l a t p a l u b e t o n d a n P U N D I T u n t u k s t r u k t u r k e p a l a j e m b a t a n , d a p a t d i l i h a t p a d a T a b e l 5 d a n

G a m b a r 5 .

N o . T i t i k

J a r a k R a m b a t ( S )

( m m )

W a k t u R a m b a t ( T )

( o s e t )

T i p e C a r a T e s

F a k t o r K o r e k s i

W a k t u r a m b a t s e l e l a h d i k o r e k s i ( T )

( o s e t )

K e c . R a m b a t ( V ) s t e l a h d i k o r e k s i

( K m / S )

1 645.00 156.30 L 1.00 156.30 4.13

2 645.00 158.10 L 1.00 153.10 4.0S

3 645.00 163.40 L 1.00 163.40 3.95

4 645.00 158.10 L 1.00 158.10 4.08

5 645.00 150.50 L 1.00 150.50 4.29

6 645.00 152.50 L 1.00 152.50 4.23

7 645.00 156.50 L 1.00 156.50 4.12

8 645.00 159.20 L 1.00 159.20 4.05

9 645.00 159.40 L 1.00 159.40 4.05

10 645.00 157.80 L 1.00 157.80 4.09

11 1600.00 395.30 L 1.00 395.30 4.05

12 1600.00 393.90 L 1.00 393.90 4.06

13 1600.00 390.70 L 1.00 390.70 4.10

14 1600.00 387.40 L 1.00 387.40 4.13

15 1600.00 384.70 L 1.00 384.70 4.16

16 1600.00 376.20 L 1.00 376.20 4.25

17 1600.00 391.50 L 1.00 391.50 4.09

18 1600.00 387.00 L 1.00 387.00 4.13

19 1600.00 383.20 L 1.00 3S3.20 4.18

20 1600.00 391.30 L 1.00 391.30 4.09

j u m l a h E N = 82.29

K e t e r a n g a n : L a d a l a h cara l a n g s u n g

32

Tinjauan Hasil Uji Mutu Beton Jembatan dengan Alat Palu Beton dan Pundit (N. Reina Seliati)

T a b e l 5 . H a s i l p e n g u j i a n k e p a l a j e m b a t a n d e n g a n a l a t p a l u b e t o n

N o . A n g k a P a n t u l f a k t o r

r a t a - r a t a . , . k o r e k s i

Nilai _{° b} Ob-°bm ( O b - C W >2

N o .

1 2 3 4 5

f a k t o r r a t a - r a t a . , .

k o r e k s i P a n t u l k g / c m² k g / c m²

1 34 37 31 30 34 33.2 1 33.20 291.88 -30.49 929.66 2 36 38 39 32 37 36.4

1

^{36.40 346.62 24.25 588.04}

3 30 34 36 38 38 35.2

1

^{35.20 325.83 3.46 11.99}

4 44 35 40 41 38 39.6

1

^{39.60 403.37 81.00 6561.19}

5 44 38 39 38 38 39.4 1 39.40 399.77 77.40 5991.19 6 40 40 38 39 39 39.2

1

^{39.20 396.18 73.81 5448.05}

7 36 34 33 34 35 34.4 1 34.40 312.14 -10.23 104.60 S 39 38 32 30 32 34.2 1 34.20 308.74 -13.63 185.71 9 37 35 32 34 30 33.6 1 33.60 298.60 -23.77 565.18

10

^{36 34 35 36 32} 34.6 1 34.60 315.55 -6.82 46.49

n

^{32 30} 32 37 34 33.0

1

^{33.00 291.00 -3137 984.08}

12 35 33 36 34 35 34.6

1

^{34.60 315.55 -6.82 46.49}

13

^{34 33} 34 32 33 33.2 1 33.20 291.88 -30.49 929.66 14 32 34 35 32 35 33.6 1 33.60 298.60 -23.77 565.18 15 34 36 37 36 35 35.6 1 35.60 332.73 1036 10730 16 30 32 34 30 32 31.6

1

^{31.60 265.42 -56.95 3243.76}

17 36 39 36 36 34 36.2 1 36.20 343.13 20.76 431.18 18 36 34 30 30 30 32.0 1 32.00 274.00 -4837 2339.66 19 30 32 34 34 32 32.4 1 32.40 278.56 -43.81 1918.89 20 34 34 34 36 36 34.8 1 34.80 318.97 -3.40 11.56 21 40 40 40 38 30 37.6 1 37.60 367.69 4532 2053.72 22 36 38 36 36 30 35.2 1 35.20 325.83 3.46 11.99 23 38 35 34 36 36 35.8 1 35.80 336.19 13.82 190.97 24 30 32 33 33 34 32.4 1 32.40 278.56 ^»3.81 1918.89 25 38 34 32 32 36 34.4

1

^{34.40 312.14 -10.23 104.60}

26 34 35 34 36 35 34.8 1 34.80 318.97 -3.40 11.56 27 30 32 34 37 36 33.8 1 33.80 301.97 -20.40 416.20 28 41 40 44 39 39 40.6 1 40.60 421.46 99.09 9818.31 29 32 32 34 33 34 33.0 1 33.00 291.00 -31.37 984.08 30 32 33 33 38 38 34.2 1 34.20 308.74 -13.63 185.71

Jumlah 9671.09 46705.88

Kuat Tekan (kgfcmZ)

4 5 0 . 0 0 4 0 0 . 0 0 3 5 0 . 0 0 3 0 0 . 0 0 2 5 0 . 0 0 2 0 0 . 0 0 1 5 0 . 0 0 1 0 0 . 0 0 5 0 . 0 0 0 . 0 0

iiiiiiiiinninniiiiniim

IIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIII

iiiimmiiiiiiimimimii

IIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIII

G a m b a r 5 . D i a g r a m n i l a i k u a t t e k a n b e t o n d e n g a n a l a t p a l u b e t o n p a d a s t r u k t u r k e p a l a j e m b a t a n

J u r n a l Transportasi J a l a n . V o l u m e 0 1 N o . I J u n i 2 0 1 4 , 2 5 - 3 5