tsev ntawv

Khoom siv tsev yog ntau yam khoom siv hauv cov phiaj xwm tsim kho. Muaj ntau hom khoom siv hauv tsev, uas tuaj yeem muab faib ua: (1) Cov khoom siv hauv, uas suav nrog cov ntaub ntawv hlau (suav nrog cov ntawv hlau thiab cov hlau tsis muaj hlau) thiab cov khoom siv tsis yog hlau (xws li pob zeb ntuj, hlawv lub ntiaj teb) cov khoom lag luam, xis mas, pob zeb thiab cov khoom lag luam silicate) Tos). (2) Cov ntaub ntawv organic, uas suav nrog cov khoom siv cog ntoo, cov ntaub ntawv hluavtaws polymer (suav nrog cov leeg, tshuaj pleev ib ce, cov nplaum) thiab cov ntaub ntawv asphalt. (3) Cov ntaub ntawv khoom siv, suav nrog cov asphalt ua vaj tse, pob zeb ua vaj tse pob zeb, thiab lwm yam, feem ntau yog cov khoom siv hauv cov khoom tsis yog xim hlau thiab cov ntaub ntawv organic.