K H O A H O C - C O N G N G H t ^
Lfng dung lop phu mat duang Micro surfacing trong cong tac bao tri duong bo
• ThS. LAM HUfU QUANG;ThS. VO V A N T H A N G Vien Khoa hoc va Cong nghe Giao thdng van tdl
TOM TAT. Bai bao trinh bay ve uu diem cua lop phu m^t duong Micro surfacing trong cong tac b^o tn duong bp va danh gia ket qua thd nghiem Micro surfacing tren 3 doan quoc Id ducc tnen khai theo cong nghe cua Cong ty Elsamex Wamtenance Services Limited, India
TL; KHOA: Ldp phu mSf duong Micro surfacing, nhu tuong, do nham, sue khang truert, b^o tri.
ABSTRACT: This paper presents advantages of Micro Surfacing wearing course in Road maintenance and evaluates Results of Micro surfacing Tnai Application on Three Tnal sections under National Highway carried out byElsamex Maintenance Services Limited, India company KEYWORDS: Micro Surfacing wearing course, emulsion, roughness, skid resistance, maintenance
I.DATVANDE
^ He thdng qudc Id, dudng cao tdc Viet Nam cd tdng chieu dai 18.744km cd ket cau mat dUdng be tdng nhaa, bao gdm 104 tuyen qudc Id, 5 doan tuyen cao tdc. Trong tUong lai, he thdng dudng cap cao nudc ta se phat trien manh ban nhim dap dng nhu cau van chuyen hang hda, hanh khach
^ De duy tri v l keo dli tuoi thp cua tuyen dadng, can thiet phai cd ehien luoc cung nha edng nghe blo tri mat dudng. Viec ap dung kip thdi cle phaong phap bao tri, sda chda mdt each lien tuc edthe duy tri mit dUdng trong tinh tr?ng tdtva loai trd viec phai xlydUng tai dudng dan den tdn kem ban nhieu so vdi kinh phi dau tu cho cdng tic blo tri.
Tren the gidi, cdng tac b l o tri, sda chda mat dudng d td rat duoc chu trong, nhat la cdng tac blo tri phdng ngda Theo ket qui nghien cdu ciia Ngan hang the gidl, vdl cung mdt giai phap bao tri, nhung d thdi diem bao tri khac nhau cho thay, khi thac hien cdng tac bao tri trong gjai doan blo tri phdng ngCra thi chi ton chi phi khoing 01 USD, nhung neu trien khai cdng tac bao tri d giai doan sau nay, khi mat dadng gilm chat laong dang ke thi chi phi phli tdn den td 4 - 5 USD hoac Idn han
Nhung cdng nghe blo tri phdng ngda daac nghien
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cdu ap dung phd bien tren the gidl cd hieu qu^ hien nay cd the ke d^n la: Phun nhUa (Fog seals); vda nhoa (Slurry seals); vda nhUa polymer (Micro surfacing), trong do Idp phu mdng Micro surfacing cd Uu diem han hin.
2. C O N G N G H E M I C R O SURFACING T R O N G BAO TRlDUdNGBO
Micro surfacing la hdn hap bao gdm: Cdt lieu, nhO tuong nhua dadng polymer goc axit phan tach sdm, nadc, bdt khoing va cac chat phu gia duoc phdi trdn vdi nhau theo tyle thiet ke.
Micro surfacing daoc thl cdng blng he thdng thi^t bi chuyen dung hidn dal, t u hanh. Vat lieu (da dam, bdt khoang, nhu tuong, chat phu gia) duoc tU ddng cln dong theo dung ty le thiet ke, duac trdn vdi nhau trong thung trpn v l duac rli tr§n mat dadng b^ tdng nhda cu vdi chieu day thich hop qua tdc dd di chuy&n cua thiet bi chuyen dung.
Chieu dly Idp Micro surfacing thudng td 3,6mm - 10,8 mm. Cd the cho phep thdng xe ngay sau 2 gid sau khi rai Micro surfacing.
Micro surfacing duac sd dung rdng rai d cic nadc trong cdng tac b^o tri mat dudng nhim muc dich sau:
- Sda chda khuyet tat b l mat nhu bong bat, chly nhua; nang cao sdc khang trugt mat dudng; cli thien dd go ghe v l hin lun cua mat dudng, \hm cham qua trJnh 6 xy hda va gla hda mit dudng; ngan nUdc xam nhip vio ket cau mat dadng.
De dam blo chat laong Idp phd mdng Micro surfacing, vat lieu (dl dam, bdt khoing, nhij tUOng polymer) phli duoc tuyen chon cd chat luong tdt, vi|c thiet ke hon hop Micro surfacing phli theo dung quy djnh.
Cd 2 phuang phlp thiet ke hdn hop Micro surfacing duoc ap dung pho bien tren the gidi II phaang ph^p cua ISSA (Hiep hdi Vda nhua quoe te) v l phaong ph^p cua ASTM (ASTM D6372) Cac phuang phap n^y da dUa ra cac tieu chuin vat lieu cho Micro surfacing, hUdng din cleh thiet k^ hdn hop Micro surfacing vdi cic chl tieu thi nghiem tUOng Ung.
Hai phaong ph^p thiet ke hdn hop Micro surfacing nly nhin chung khdng cd su khac nhau nhieu, trong dd phaong phlp cua ISSA duac ap dung rdng rai ban
Ldp phu mSt dudng Micro surfacing chl dapc rli tren ket cau ao dudng ed du cudng do taang dng vdi lOu laong xe v^ t l i trong truc xe da thiet ke, mat dudng trade khl ral hdn hap Micro surfacing phli a i m blo be rdng vlt not khdng qu5 6mm.
ounam Vien Khoa hpc va Cong nghe Giao thong van tai So 8/2016
3 . T l N H H ) N H T R I ^ N K H A I MICRO SURFACING TAI C A C O O A N T H U f N G H i e M
Theo c h i d a o eua Bd GTVT tai van ban so 10985/
BGTVT-KHCN ngay J9/8/2015 eua B d G T V T v e viec chap t h u a n h d so t h d n g h i e m c d n g n g h e Micro surfacing t r o n g c o n g tac b a o tri d u d n g b o va tai van b i n sd 13023/
BGTVT-KHCN ngay 30/9/2015 cua Bd GTVT ve viec chap t h u i n b d s u n g dia d i e m thCf n g h i e m c d n g n g h e M i c r o surfacing t r o n g c d n g tac bao tri d u d n g b d , cac d o a n t h i cdng t h i r n g h i e m c d n g n g h e Micro surfacing bao g d m 3 doan t h d n g h i e m :
- D o a n 1 -Tlf K m 4 5 5 + 0 0 0 - Km455+850, t h u d c d u d n g Hd Chl M i n h d o a n q u a t i n h Hda Binh.
- D o a n 2- Tir K m 2 I 3 + 9 5 0 - K m 2 I 4 + 4 5 0 , t h u d c Q L l doan qua t i n h Ha Nam
- D o a n 3: Tif K m 2 5 7 + 0 0 0 - Km257+500, t h u d c Q L l doan qua t i n h N m h Binh.
Cdng tac t h i c d n g t h i d i e m tai 3 d o a n d o Cdng t y Elsamex M a i n t e n a n c e Services L i m i t e d , India va d d i tac thuc hien t h e o cdng n g h e cua C d n g t y Elsamex, d a d i s u glam sat cua Vien Khoa hpc va C d n g n g h e GTVT va s u chdng kien cua cac ben hen q u a n v d i he t h d n g t h i e t bj chuyen d u n g va t h i e t bi d l sd d u n g .
Cdng n g h e b l o tri d u d n g b p s d d u n g Idp p h u Micro surfacing da d u a c dUa vao t h d n g h i e m d V e t Nam tir t h i n g 12/2015. Viee n g h i e n edu d a n h gia hieu q u i cua cdng n g h e nay la can t h i e t d e phuc v u c d n g tac b l o tri d u d n g b d m d t each cd hieu qua
4 . K ^ T Q U A T H ( N G H i e M 4 . 1 . K e t q u ^ t h i n g h i e m t r o n g p h o n g 4 1.1. Vdtlieusddung
- Da d a m ' Sd d u n g 01 loai da 0 - 7 m m lay t u m d Sunway - Hda n i a c h - Qude Oai - Ha Ndi:
- Bdt k h o a n g : Bdt k h o a n g sd d u n g la xi m a n g Nghi San PCB40;
- N h u t u a n g : L l n h u t u o n g nhUa d u d n g goc axit phan tach sdm d u a c c l i tien t h e m p o l y m e r (CQS - 1 hP) do Cdng t y Elsamex M a i n t e n a n c e Services Limited, India phdi h p p v d l C d n g t y Transmeco san xuat;
- Phu gia' D o C d n g t y Elsamex Maintenance Services Limited. An D d c u n g cap.
4.1.2. Yeu cau ddl vdi hon hap Micro surfacing Hon h o p Micro surfacing c d t h a n h phan cap phdi va p h a m VI a p d u n g duoe q u y d m h tai Bdng 4 1.
Bing 4.1. Cap phdi han hop cdt lieu Micro surfacing
Bif>g 4.2. Ijfong sudung cua hon hap Micro surfacmg
Lutmg aung tm-ig bmh cua cot I.e-j c trang tha, kho ilig/m3) ^ {khong cc n u i x fl 1 - 16 3 Ham [^ong r-hwi . ^ cot lieu g trang thai khoi 5 , 5 - 1 0 J
Hon h o p Micro surfacing c d c i c chi t i e u ky t h u a t t h e o q u y d i n h tai Bdng 4.3.
^Bang 4.3. Cic chi tieu quy dinh aia hon hop Micro surfacing
N h u t a o n g n h u a d a d n g s d d u n g c h o h o n h a p M i c r o surfacing I I loai n h u t u a n g nhua d a d n g p o l y m e r g d c axit phan tach sdm (CQS-lhP) d o Cdng t y Elsamex M a i n t e n a n c e Services L i m i t e d , A n D d p h o i h o p v d i C d n g t y Transmeco san x u l t c u n g cap cd cac chi t i e u ky t h u a t t h e o q u y d i n h tal Bdng 4.4
Bang4.4. Cac chi^ oiu quy dinh cda nhu tuong nhua duong
Cdt lieu da d u n g c h o h o n h o p Micro surfacing d u o c iay t d m d Sunway - Hda Thach - Quoc Oai - H I Ndi ed cac chl tieu CO ly cua cdt lieu duoc d u n g t r o n g h d n h o p M i c r o surfacing phai t h o a m a n cac yeu cau q u y d i n h tai Bdng4.5
Bang 4.S. Cac chl deu co ly quy dinh cho cot lieu
^ Bot khoang d u n g t r o n g hdn h o p Micro surfacing la xi m a n g Nghi Son PCB40 ed cac ehi tieu quy d i n h tai fldrig^ 6
Bang 4.6. Cac chi biu coly quy Oinh cho xi ming
Lieu l u o n g sd d u n g cua h d n h o p Mic d a o c dua ra tai Bdng 4.2.
I surfacing
KHOA H O C - C O N G NGHE
4 . 2 . Ket q u a thiet ke h d n htfp Micro surfacing t f o n g p h o n g
4.2.1. Muc dich thiet ke
Tim ra t y le p h d i h o p cua cac Ioai vat lieu (da d a m , eat, b d t khoang, n h u t u o n g nhua d U d n g , p h u gia va nudc) de thda m a n c i c chf tieu ky t h u a t yeu cau cua h o n h o p Micro surfacmgtheo q u y d m h .
4.2.2. Trinh tU thiet kehdn hap Micro surfacing - T h i n g h i e m x i c d i n h cac chi t i e u c a l y c u a v l t lieu s d d u n g de thiet ke hon h o p Micro surfacing;
- Phdi trdn t y le cap p h d i : Sd d u n g 01 loai da d a m 0 - 7 m m d e lam cap p h d i h o n h a p Micro surfacmg (Loai III);
- T i n h t o a n h a m l a o n g t d i Uu ciia nUdc, b d t k h o a n g va chat p h u gia;
-Tinh t o a n h a m lUong t d i Uu cua n h u tUong.
4.2 3. Dudng cong cdp phoi thiet ke hon hap Micro surfacing sau khi phdi tron
Hinh 4.1: Duong cong cap phoi thiet kehSn hap Micro surfacing 4.2.4. Ket qud Ida chon hdm luang xi mdng, nudc. phu gia vd nhu tuang toi Uu
- Xl m a n g : 1,0% theo khoi l u o n g cdt lieu - Nudc. 10,0% t h e o khdi l a o n g cdt lieu.
- Phu gia' 1,2% t h e o khdi l a o n g c d t lieu.
- N h u t a o n g : 10,0% t h e o k h d i l a a n g cdt lieu.
4.2.5 Ket qud thinghiem cdc chi tieu ca ly cua hon hap Micro surfacing duac dUa ra tai Bdng 4.7.
Bing 4 7. Ket qui thlnghiim cac chl tieu col^
Clia hon hpp Micro surfacing
Nhdn xet. Hdn h o p Micro surfacing ed e l c chi tieu t h i nghiem thda m a n t h e o q u y dinb YCKT
4.3. Ket q u a thiJf n g h i e m h i e n t r U c m g 4.3.1. Ket qud khdo sdt. thdnghiem tren cdc doan thi diem truoc khi thi cdng
Cdng tac k h i o sat, t h d n g h i e m tren cac d o a n t h i diem trade khi t h i edng bao g d m
- Khao sat hien trang mat d u d n g c u ; khao sat lau luong giao t h d n g ; d o m d - d u n dan hdi bSng can d o v d n g Benkelman, d o d o bang p h i n g b a n g t h u d c 3 m e t ; d o nham xae d m h b l n g p h u a n g p h a p r i e cat; sdc khang t r u o t xae d m h bang con lac A n h ; d o vet h i n lun banh xe bang thude thep
62
K f t qua k h i o sat thCr n g h i e m c h o thay: Cac dia d i e m t h d n g h i e m d i p d n g d u cac q u y d i n h t h e o d e c U o n g thCf n g h i e m da d a o c p h e d u y e t d e t i e n h a n h t h d n g h i e m .
4.3.2. Ket qud kiem tra trong qud trinh thi cong Cdng tac chuan b i , t h i c d n g d o a n t h i d i e m nhin c h u n g da t u a n t h e o c h i d a n ky t h u a t va dUdi sU g i l m s i t , h u d n g dan true t i e p cua cac c h u y e n gia cua C d n g ty Elsamex Maintenance Services L i m i t e d , A n D d .
4.3.3. Ketqua thinghiem. kiem tra sau khi thi cong Cdng tac t h l n g h i e m , k i e m tra d a n h gia sau khl thl c d n g (0 - 72 g i d , 1 t h a n g , 3 t h a n g , 6 t h a n g ) b a o g d m cae ndi d u n g sau:
- Nhan xet, d a n h gia t i n h t r a n g e h u n g m a t dUdng;
d o d d b l n g p h i n g b l n g t h a d c 3 m e t , d o n h a m xac dinh b l n g p h u a n g p h l p rac cat; sdc k h i n g trUat xac d i n h b l n g con lac A n h ; d o v e t h i n l u n b a n h xe b l n g t h u d c thep.
4.3.4. Tmh trang chung matdudng sau khi rdi hon hap Micro surfacing
- M a t d u d n g b l n g p h i n g , k h d n g cd h i e n t a o n g nCit v d h u h d n g ;
- C l i t h i e n kha n a n g b a o v e m a t d u d n g cfl ngan n u d c x a m n h a p vao ket cau m a t d u d n g ;
- Be m a t dUdng n h a m h a n so v d i m a t d u d n g trade khl r l i h o n h a p Micro surfacing.
4.3 5 Do bdng phdng mdt dudng b&ng thudc 3 met D p b l n g p h i n g m a t d u d n g d o b l n g t h u d c 3m t r e n 3 d o a n t h d n g h i e m d a t y e u c a u t h e o Tieu c h u i n TCVN 8 8 6 4 . 2 0 1 1 .
4.3.6. Bo do nhdm bdng phuang phdp rdc cat
illll illli i I Tl I
Hlnh 4.2: Bleu ddso sinh dd nham ric cSt theo thiit ai
.
:. _, JJ Ai^iJ Kpuy put. (V? w^jw uv^fj
60 Film Vien Khoa hoc va Cong nghe Giao thonq van tai
Nhan xet Od nham mat dudng sau khi rai hon hop Micro surfacing do blng phaong phap ric cat cai thien so VOI trade khl rai hon hop Micro surfacing va suy giam khong dang ke theo thdi gian khai thie.
4.3.7 Sdc khdng truat bdng con Idc Anh
Hinh 4.3- Bieu do so sinh sue khing truot theo thdi gian Nhdnx^t:Sdc khang truat mat duong sau khi rai hdn hop Micro surfacing do blng phuang phap eon lie Anh ell thien so vdi trudc khi r^i hon hop Micro surfacing va suy gilm khdng dang ke theo thdi gian khai thac
S.K^TLUAN-KieNNGHj
- Bao tn dadng bd la mpt ehien luoc quan trong nhim kip thdi khic phuc cac hu hdng xuat hien trong qua trinh khai thae, cac hu hdng xuat hien do cac yeu to bat loi eua mdi trudng; duy tri he thdng dudng bd ludn d tinh trang ky thuat tdt; nang cao chat luong khai thac, k^o dai tudi tho eua cdng trinh, tiet kiem chi phi dau tu
- Micro surfacing la mdt edng nghe moi, co nhieu uu diem, tang kha nang khang truert mat dadng nen duoc su dung CO hieu qua trong bao tri mat dudng be tdng nhua - Cdng tac thit nghiem Micro surfacmg buoc dau tai Viet Nam da duac tien hanh nghiem tuc, theo dung de cuong daoc Bd chap thuan, dudi sUhd tro ciia eac chuyen gia den tdTay Ban Nha va An Dd Ket qua cho thay dam blo yeu cau ky thuat, buoc dau da chung mmh duoc hieu qua ky thuat khi sddung hon hop Micro surfacing (1) Cd tac dung keo dai tudi tho ciia mat duong be tdng nhua; (2) cd khl nang ehdng tham nuoc tham nhap vao mat dudng be tdng nhua, (3) cd hieu qua kmh te cao
(neu so sanh kmh te trong ea vdng ddi cua mat dudng cd rli hdn hop Micro surfacing voi mat dudng khdng rai hdn hop Micro surfacing); (4) ngoli ra, viec sir dung hon hpp Micro surfacing cd nhieu lOi ich khae ve khai thac (do khdng phai cam dudng lau, thiet bi thi cdng it, co dpng) va moi trudng.
- Tiep tuc theo ddi danh gia cae doan dudng thd nghiem Micro surfacing de cd co sd tdng ket danh gia hieu qua ciia cdng nghe Micro surfacing trong blo tri dudng bd Viet Nam.
Tai Meu tham khao
[1]. ASTM D6372-05, Standard Practices for Desing, Testing and Construction of Micro surfacing (Tieu ehuan Thiet ke, Thi nghiem v l thi cdng Micro surfacing)
[2]. ISSA A143: 2010, Recommended Performance Guideline For Micro Surfacing (Chi dan ve tfnh nang cho Micro Surfacing).
[3]. Gidl thieu ve cong nghe Micro surfacing cua Cdng ty Elsamex Maintenance Services Limited. An Do
[4]. Bdo cdo ket qud cua Vien Khoa hoc vd Cong nqhe 6/2016 ^ a '
Ngay nhan bii: 12/7/2016 Ngay chap nhan tfang: 20/7/2016 Ngirert phin bien: PGS. TS. Vu Otfc Chinh
TS, Nguyen Quang Phiic
