Asph alt pob zeb yog cov khoom siv sib xyaw uas feem ntau siv rau hauv txoj kev, chaw nres tsheb, tshav dav hlau, thiab lub hauv paus ntawm embankment dams. Kev sib xyaw asph alt tau siv rau hauv kev tsim kho av txij thaum pib ntawm lub xyoo pua nees nkaum.
txhais li cas los ntawm asph altic pob zeb?
Asph alt pob zeb yog cov khoom siv feem ntau siv hauv kev tsim kho xws li txoj kev chaw, chaw nres tsheb, thiab tshav dav hlauAsph alt pob zeb muaj asph alt tov nrog cov ntxhia sib xyaw thiab tom qab ntawd muab tso rau hauv txheej thiab compacted. … Nws yog feem ntau hu ua yooj yim asph alt lossis blacktop.
Dab tsi yog qhov txawv ntawm asph alt pob zeb thiab asph alt?
Qhov tseem ceeb, asph alt muaj cov hnav ris tsho zoo nkauj ua los ntawm cov hauv paus thiab cov kev kawm subbase. Cov kev kawm no feem ntau yog pob zeb lossis pob zeb, thiab lawv so raws li kev cog lus subgrade (uas yog cov av compacted). Hloov pauv, cov pavement nruj yog tsim nrog Portland cement pob zeb.
YYog bituminous qhob asph alt?
Bituminous kho aggregate puag yog ib hom txias mix Asph alt Qhob. Nws tuaj yeem muaj cov txheej txheem gravel; crushed pob zeb; los yog sib tov ntawm pob zeb, xuab zeb, thiab cov khoom siv pob zeb crushed - txhua qhov ruaj khov nrog ib feem pua ntawm asph alt.
Dab tsi yog bituminous premix?
A premix ntawm bitumen thiab xuab zeb (nrog lossis tsis muaj qhov muab tub lim) thiab tsis tsawg dua 30% los ntawm qhov hnyav ntawm cov ntxhia aggregate ntawm qhov loj dua cov xuab zeb, sib xyaw thiab tso rau ntawm qhov kub thiab txias nyob ib ncig ntawm 35 degree Fahrenheit thiab yuav tsum tau hnyav binder feem ntau yog 50-60, 60-70, 70-80, 85-100.
