Nyob rau hauv txoj kev paving tej yaam num, kom raug tswj tus nqi ntawm asphalt yog ib tug tseem ceeb prerequisite kom paub tseeb tias tsis tu ncua paving zoo thiab efficiency. Asphalt, raws li ib feem tseem ceeb ntawm cov sib tov, ncaj qha cuam tshuam lub zog thiab durability ntawm txoj kev nto. Kev cuam tshuam ntawm kev xa khoom tuaj yeem ua rau poob qis hauv qhov kub ntawm qhov sib tov, txo qis kev sib xyaw kom zoo thiab tawm hauv qab cov teeb meem xws li cov kab nrib pleb thiab xoob ntawm txoj kev, ua rau muaj kev cuam tshuam loj rau txoj kev ua neej.
Kev kwv yees ntawm asphalt kom muaj nuj nqis yog nyob ntawm cov ntsiab lus tseem ceeb thiab cov qauv qauv. Qhov tseem ceeb tsis muaj xws li tsim thickness (centimeters), paving cheeb tsam (square meters), sib tov ceev (ib txwm ntau 2.35-2.45 tons / cubic meter), thiab asphalt ntsiab lus (4% -6% ntawm qhov sib tov hnyav). Piv txwv li, nyob rau hauv ib tug raug project: paving txoj kev 1 km ntev, 7 meters dav, thiab 5 centimeters tuab, tag nrho cov nqi ntawm cov sib tov yog xam raws li 1000 meters × 7 meters × 0.05 meters × 2.4 tons / cubic meter=840 tons. Raws li cov ntsiab lus asphalt 5%, qhov xav tau asphalt kom muaj nuj nqis yog 840 tons × 5%=42 tons. Cov txheej txheem kwv yees tus qauv muab cov ntaub ntawv raug rau kev npaj cov khoom siv, zam kev tsis txaus lossis pov tseg.
Ua kom muaj kev sib txuas ntxiv ntawm asphalt los ntawm cov saw hlau thoob ntiaj teb yog lwm qhov kev txhawb nqa tseem ceeb rau kev paving txuas ntxiv. Cov qauv kev lag luam tau teev tseg tias kev cuam tshuam ntawm asphalt yuav tsum txwv tsis pub dhau 30-40 feeb; Tshaj qhov ntau yam no yuav cuam tshuam rau kev tsim kho kom zoo. Yuav kom ua tau raws li qhov yuav tsum tau ua, nws yog ib qho tseem ceeb uas yuav tsum tau siv ntau lub tso tsheb hlau luam lossis tsim kom muaj cov saw hlau ruaj khov, tshwj xeeb tshaj yog nyob rau thaj tsam ntawm cov kob xws li Indonesia thiab Philippines, qhov chaw tsheb thauj mus los thiab kev txwv ib puag ncig yuav tsum tau ua tib zoo xav, thiab muab cov khoom siv ntxiv ntxiv. Ib txhij, nws yog ib qho tsim nyog los npaj "cov ntaub ntawv ntws" ua ntej, xav txog kev tsim kho lub sijhawm, kev tsim khoom, thiab kev hloov pauv huab cua, kom ntseeg tau tias asphalt cov khoom tau zoo sib xws nrog kev tsim kho thiab zam kev cuam tshuam los ntawm huab cua huab cua lossis kev hloov pauv ntau lawm.
Hauv cov ntsiab lus, txoj kev vam meej ntawm txoj kev txuas mus ntxiv yuav tsum tau ua ke nrog kev kwv yees asphalt kom muaj nuj nqis nrog kev tswj cov saw hlau nruj. Kev kwv yees txoj hauv kev muab cov ntaub ntawv txhawb nqa rau kev npaj cov khoom siv, thiab cov txheej txheem ntawm cov khoom siv saw hlau tiv thaiv cov khoom txuas ntxiv. Ua ke, lawv tsim lub hauv paus lav ntawm kev ua tau zoo thiab kev ua haujlwm ntawm txoj kev paving tej yaam num.