Hloov kho bitumen hais txog kev sib xyaw asphalt nrog kev sib ntxiv ntawm roj hmab, cob, siab molecular polymer, finely av roj hmab hmoov thiab lwm yam kev hloov kho, los yog kev siv me me oxidation ua ntawm bitumen los txhim kho cov kev ua tau zoo ntawm bitumen. Cov pavement paving nrog nws muaj zoo durability thiab abrasion tsis kam, thiab tsis soften nyob rau hauv high kub los yog tawg ntawm tsawg kub.

Qhov kev ua tau zoo ntawm kev hloov kho bitumen los ntawm kev hloov kho ntxiv rau nws. Qhov kev hloov pauv no tuaj yeem tsis tsuas yog sib koom ua ke nrog ib leeg nyob rau hauv qhov kev txiav txim ntawm qhov kub thiab txias, tab sis kuj hnov ​​​​mob nrog bitumen, yog li txhim kho cov khoom siv ntawm bitumen zoo heev. ib yam li ntxiv steel tuav rau pob zeb. Txhawm rau tiv thaiv kev sib cais uas yuav tshwm sim hauv kev hloov kho bitumen, cov txheej txheem hloov kho bitumen tau ua tiav hauv cov khoom siv tshwj xeeb mobile. Cov kua sib tov uas muaj bitumen thiab hloov pauv tau dhau los ntawm lub tshuab colloid tag nrho ntawm grooves. Nyob rau hauv qhov kev txiav txim ntawm high-speed rotating colloid zeb, cov molecules ntawm lub modifier yog tawg los tsim ib tug tshiab qauv thiab ces lased mus rau lub sib tsoo phab ntsa thiab ces bounce rov qab, sib npaug zos rau hauv bitumen. Lub voj voog no rov ua dua, uas tsis yog tsuas yog ua rau abitumen thiab qhov kev hloov kho ua tiav homogenization, thiab cov saw hlau molecular ntawm cov hloov pauv tau rub ua ke thiab muab faib rau hauv ib lub network, uas txhim kho lub zog ntawm qhov sib tov thiab txhim kho kev qaug zog. Thaum lub log hla dhau qhov hloov kho bitumen, txheej bitumen undergoes sib xws me ntsis deformation. Thaum lub log hla dhau, vim yog lub zog sib txuas ntawm cov hloov bitumen mus rau qhov sib sau ua ke thiab zoo elastic rov qab, qhov squeezed sai sai rov qab mus rau flatness. tus yam ntxwv.
Hloov kho bitumen tuaj yeem txhim kho lub peev xwm ntawm txoj kev pavement, txo cov pavement qaug zog los ntawm overloading, thiab exponentially txuas lub neej kev pab cuam ntawm pavement. Yog li ntawd, nws tuaj yeem siv dav hauv paving ntawm high-grade highways, tshav dav hlau khiav, thiab txuas hniav. Xyoo 1996, kev hloov kho bitumen tau siv los ua txoj hauv kev rau sab hnub tuaj ntawm Peev Tshav Dav Hlau, thiab txoj kev ntog tseem nyob rau niaj hnub no. Kev siv cov hloov kho bitumen nyob rau hauv permeable pavements kuj tau nyiam heev. Lub void tus nqi ntawm permeable pavement tuaj yeem ncav cuag 20%, thiab nws txuas nrog sab hauv. Cov dej nag tuaj yeem ntws tawm sai sai ntawm txoj kev taug kev rau hnub los nag kom tsis txhob plam thiab txaws thaum tsav tsheb. Tshwj xeeb, kev siv cov hloov kho bitumen tuaj yeem txo cov suab nrov. Ntawm txoj kev uas muaj cov tsheb loj loj, cov qauv no qhia nws qhov zoo.
Vim muaj tej yam xws li qhov kub thiab txias sib txawv thiab vibrations, ntau tus choj decks yuav hloov thiab tawg sai sai tom qab siv. Kev siv cov hloov kho bitumen tuaj yeem daws qhov teeb meem no zoo. Hloov kho bitumen yog ib qho khoom siv zoo tshaj plaws rau kev ua haujlwm siab thiab cov tshav dav hlau khiav. Nrog rau kev loj hlob ntawm kev hloov kho bitumen thev naus laus zis, kev siv cov hloov kho bitumen tau dhau los ua kev pom zoo ntawm cov teb chaws thoob ntiaj teb.