Amaphuzu ancibilikayo futhi abilayo we-asphalt: Kungani ithambisa emazingeni okushisa aphezulu? ​​

Asphalt, inhlanganisela eyinkimbinkimbi yama-hydrocarbons, ayinawo indawo ebukhali yokuncibilika ngenxa yokwakheka kwayo okune-heterogeneous. Esikhundleni salokho, kukhombisa uhla lwendawo yokuthambisa (imvamisa engama-40-60 ° C ye-petroleum asphalt), ngaphezu kwalokho okuguqukayo kusuka kokuqinile ku-viscous uketshezi. Lokhu kuziphatha kuvela esakhiweni sayo se-colloidal:

Ama-Molecular Dynamics: emazingeni okushisa aphezulu, ingxenyenamba yamafutha e-liquid (ama-maltenes) ngaphakathi kwe-asphalt iba uketshezi oluningi, yenza buthaka i-matrix eqinile e-asphaltene. Lokhu kunciphisa amabutho we-intermolecular, kubangele ukuthambisa.
Ukuzwela okushisa Isibonelo, ngo-60 ° C, asphalt ajwayelekile angalahlekelwa yi-90% yokuqina kwawo, okuholela ekutheni kube ngaphansi kwemithwalo yethrafikhi. Ama-asphalts aguquliwe (isb.
Ukubilisa nokubola:
I-Asphalt ibola ngaphambi kokufinyelela iphuzu leqiniso elibilayo (ngaphansi kwe-470 ° C), likhipha amagesi anobuthi afana ne-benzene. Ngakho-ke, iphuzu elibilayo lingafaneleki kangako kunephuzu le-flash (~ 204 ° C), elimaka ubungozi bokuqina ngesikhathi sokushisa.

Imiphumela Esebenzayo:

Ukwehluleka kwe-Pasement: Amazinga okushisa ehlobo adlula ama-50 ° C angathambisa i-asphalt, ebangela ukuguquguquka okungapheli okufana nokwehla.
Izixazululo: Sebenzisa ama-Binders aguquliwe (E.G., SBS) noma izithasiselo zokupholisa ukuthuthukisa ukuqina okushisa okuphezulu.
Ngamafuphi, i-asphalt ithambisa ngenxa yokuqhekeka kwe-colloidal kanye nokuncipha okushisayo, okudinga ukuqina kwezinto ezibonakalayo zokuqina.