Asphalt yog qhov sib xyaw tsaus nti-xim av muaj cov sib xyaw ntawm hydrocarbons ntawm ntau qhov hnyav molecular thiab lawv cov hlau me me tsis sib xws. Nws yog hom kev ua kua rau cov kua. Nws yog kua, muaj cov npoo dub, thiab yog soluble hauv cov pa roj carbon disulfide. Siv ntawm asphalt: lub ntsiab siv yog raws li cov ntaub ntawv infrastructure, cov ntaub ntawv raw thiab roj. Nws daim ntawv thov kev thauj (txoj kev tsheb, kev tsheb nqaj hlau, kev lag luam, kev lag luam (kev lag luam (lab), thiab lwm yam. Department.

Hom Asphalt:
1. Cov pob zeb pob zeb, ntim cov pob zeb yog ib qho los ntawm kev khoov, uas yog, cov khoom noj dub nyob rau hauv lub lauj kaub distillation tom qab tar distillation. Nws tsuas yog sib txawv los ntawm cov khoom ua kom zoo hauv cov khoom siv lub cev, thiab tsis muaj tseeb ciam. Txoj kev qhia dav dav yog los saib xyuas cov ntawd nrog cov qauv muag muag qis dua 26.7 ° C (Cubic Education) yog saum toj, thiab cov saum toj no 26.7 ° C yog asphalt. Courlar Tar yog muaj cov tshuaj tiv thaiv kab, pyrene, thiab vim cov khoom sib txawv ntawm cov khoom sib txawv, thiab vim cov khoom sib txawv ntawm cov khoom sib txawv, thiab vim cov khoom sib txawv ntawm cov khoom sib txawv kuj sib txawv. Kev hloov pauv hauv qhov kub muaj qhov cuam tshuam zoo ntawm cov av nplaum. Nws yog nquag rau brittleness nyob rau lub caij ntuj no thiab softening nyob rau hauv lub caij ntuj sov. Nws muaj ntxhiab tsw tshwj xeeb thaum ua kom sov; Tom qab 5 teev ntawm cov cua kub rau 260 ° C, qhov kev xav, Phenangracene, Pyrene thiab lwm yam muaj nyob hauv nws yuav nres.

2. Petroleum asphalt. Petroleum asphalt yog cov seem tom qab distillation ntawm cov roj crudill. Ua raws li cov degree ntawm refining, nws ua kua, ib nrab khoom lossis khoom ntawm chav tsev kub. Petroleum asphalt yog xim dub thiab ci thiab muaj qhov kub siab tshaj plaws. Txij li thaum nws tau distilled kom kub siab tshaj 400 ° C thaum lub sij hawm cov khoom siv ntau heev, tab sis kuj muaj kev phom sij ntau lossis tsawg dua rau tib neeg kev noj qab haus huv.

3. Ntuj asphalt. Ntuj asphalt yog khaws cia hauv av, thiab qee qhov ua tiav ntxhia tso nyiaj los yog ua rau saum npoo ntawm lub ntiaj teb crust. Feem ntau ntawm cov asphalt tau hla ntuj evaporation thiab oxidation, thiab feem ntau tsis muaj cov co toxins. Asphalt cov ntaub ntawv faib ua ob pawg: av asphalt thiab tar asphalt. Av asphalt yog muab faib ua ntuj asphalt thiab roj av asphalt. Ntuj asphalt yog qhov seem tom qab kev raug mob ntev ntev thiab cov roj evaponing tawm hauv av; Petroleum asphalt yog cov khoom tau los ntawm kev kho cov roj uas seem los ntawm ua kom zoo thiab ua tiav cov roj av los ntawm cov txheej txheem tsim nyog. Cov. Tar suab yog cov khoom reprocessed ntawm tar tau los ntawm cov pa roj carbonation ntawm cov thee, ntoo thiab lwm yam organic.

Feem ntau ntawm asphalt siv nyob rau hauv engineering yog petroleum asphalt, uas yog kev sib xyaw ntawm hydrocarbons thiab lawv cov hlau tsis sib xws. Feem ntau yog flash zaum ntawm asphalt yog ntawm 240 ℃, thiab illage point, yog li kev tsim kho qhov kub yuav tsum tau tswj hwm hauv qab flash point.