Hauv ntau thaj teb sib txawv, cov cai rau kev tiv thaiv ib puag ncig yog nruj heev tam sim no. Yuav ua li cas thiaj tuaj yeem sib xyaw ua ke sib tw tau raws li kev tiv thaiv ib puag ncig ib puag ncig? Qhov no tau dhau los ua kev txhawj xeeb rau ntau lub tuam txhab chaw nres tsheb sib tov. Yog tias cov tuam txhab tsim khoom xws li asphalt sib xyaw ua ke rau kev tiv thaiv ib puag ncig, nws yuav tsis tsuas yog txo qhov kev cuam tshuam ntawm kev muaj kuab paug ib puag ncig. Yog li, ib puag ncig kev tiv thaiv kev tiv thaiv tau dhau los ua ib qho ntawm cov haujlwm tseem ceeb ntawm kev sib xyaw.

Tam sim no, ntau lub tuam txhab tseem ceeb tshaj plaws rau lub zog txuag thiab tau txo thiab tsim khoom ntsuab. Rau qhov tam sim no asphalt ntau lawm, sib xyaw ua ke tau dhau los ua qhov txuas tseem ceeb. Thaum cov chaw nres tsheb sib tov ua rau cov khoom siv raw, muaj ntau yam kev ua paug txawv. Rau cov teeb meem no, nws yuav cuam tshuam rau kev tsim khoom ib txwm muaj thiab tsim khoom, yog li nws yog ib qho tsim nyog los ua kom zoo rau qhov chaw ib puag ncig. Ntawm lawv, suab nrov, dej ua qias tuaj thiab cov hmoov av tsis huv
Tom qab nrhiav lub ntsiab ntawm cov pa phem ib puag ncig, peb tuaj yeem hloov pauv thiab txhim kho cov teeb meem tshwj xeeb. Ntawm lawv, lub suab ua qias tuaj yog qhov teeb meem nyuaj rau kev cuam tshuam nrog, yog li peb yuav tsum xaiv cov phiaj xwm txhim kho tau zoo los ua kev hloov pauv thiab tswj lub suab nrov hauv qhov loj dua. Qhov no yuav zoo txo ​​lub suab nrov tsim los ntawm cov cuab yeej siv ntau lawm. Nyob rau tib lub sijhawm, cov kav dej phwj thiab pov tseg kev kho thiab khoom siv tseem ceeb yog cov haujlwm tseem ceeb, yog li ua tau zoo lav rau kev tsim kho tshiab.