Nws yog hom asphalt tiv taus deformation, haum rau txoj kev nrog cov tsheb hnyav. Nws tau siv nyob rau hauv tshav dav hlau cov phiaj xwm nyob rau xyoo tas los no. Pob zeb Masthast Asphalt (SMA) yog kub asphalt sib xyaw muaj muaj 70-80% coars aggregate, 20-30% siab bitumen. Nws tau tsim nyob hauv lub teb chaws Yelemees nyob rau xyoo 1960 thiab tau ua thawj zaug hauv Kiel, Lub teb chaws Yelemees.

Vim yog cov coarse aggregate tau ntom hauv qhov sib tov, cov khoob tshwm sim ntawm cov aggregates. Cov khoob no tau sau nrog txoj kev cai tshuaj cug

Cov xwm txheej ntawm kev tsim khoom
Bitumen thiab Mineral ua kev ua ke yuav tsum tau muab rhaub ntawm qhov tsawg kawg ntawm 175 ° C (degrees) thiab ntau tshaj ntawm 190 ° C (degrees).
Cog: Nws yuav tsum muaj cov khoom siv kom txiav tawm pub cov fiber ntau ntxiv thiab cov khoom siv tub lim rau ntawm qhov hnyav.
Cov kev npaj kub sib xyaw yuav tsum muab khaws cia rau hauv cov kub asphalt flunt nrog cua sov thiab rwb thaiv tsev.
Tuav ntawm qhov sib xyaw hauv cov kub asphalt bunker yuav tsum nyob rau hauv ib lub sijhawm.
Thaum cov kub sib tov yog xa mus rau lub paver, huab cua kub yuav tsum yog tsawg kawg 10 ° C thiab sib tov qhov kub yuav tsum yog tsawg kawg 170 ° C.
Vim tias cov ntxhib ntau dua ntawm cov coincate (seem ntawm No.4 Screen) hauv kev tsim qauv zoo dua li kev sib cuag ntawm lub pob zeb nrog lub pob zeb tau nce.
Feem ntau, basalt lossis aggregates nrog cov ntsiab lus silica siab sillica yog siv, thiaj li ua tsis taus yog siab.
Kev tshawb fawb pom tias SMA yog qhov ua tiav ntau dua li bituminous asphalt ntawm cov lus ntawm kev ntxhib los mos thiab swb tsis kam.
Vim tias nws muaj ntau dua hloov kho bitumen dua betuminous asphalt, nws yog tiv taus ntau dua rau cua sov.
Ib yam li ntawd, nws tau tshaj tawm tsam qaug zog nkees.
Nws muab quieter thiab muaj kev yooj yim dua tsav vim nws yog tus qauv qub.

Fiber ntau ntxiv rau cov khoom lag luam zeb mastic asphalt
Cov nroj tsuag Asphalt muaj zog yog tsim rau pob zeb macast Asphalt ntau lawm thiab peb tsis tsuas yog cov neeg ua haujlwm cellulose, tab sis kuj tom qab muag kev ua haujlwm pab txhawb nqa thiab kev kawm ua haujlwm.