Asphalt yog ib qho nyuaj, siab - molecular {} Qhov hnyav- qhov hnyav {1} Txoj kev sib xyaw ua ke, cov seem sab laug tom qab ua cov roj av. Nws yog kev sib xyaw ntawm hydrocarbons ntawm sib txawv molecular hnyav thiab lawv cov derivatives. Asphalt yog dav siv hauv kev tsim kho, thiab lwm thaj chaw ua haujlwm, noo {4} {4 4} {{4} corr} corr acid thiab kua qaub thiab alkali tsis kam. Yog li, dab tsi yog cov khoom sib txawv ntawm asphalt?