Dhalaalid iyo meelaha karkaraya asphalt: muxuu u jilciyaa heerkulka sare? ​​

Asphalt, isku dhafan oo isku dhafan oo hydrocarbons, oo ka maqan dhibic dhalaalaya oo fiiqan oo ay sabab u tahay isku xirnaanta heterogenenous. Taabadalkeed, waxay soo bandhigtay tiro jilicsan oo jilicsan (caadiyan 40-60 ° C oo loogu talagalay batroolka aspthalt), oo ka baxsan oo ay ka gudbayaan adag oo dareere viscous ah. Habdhaqankan wuxuu ka soo qaadayaa qaab dhismeedkeeda qaladka ah:

Dhaqdhaqaaqa molikalics: heerkulka sare, jajabka saliida ee dareeraha ah (malaa'iduhu) gudaha digaagga ayaa dheecaan dheeri ah, daciifaya huurada adag ee Asaltenetttenetttene Tani waxay yareynaysaa xoogagga is-dhexgalka, taasoo ka dhigeysa jilcinta.
Dareenka heerkulka: visthals visty-ka ayaa si isku mid ah ugu kulul kuleylka. Tusaale ahaan, at 60 ° C, heerka asphalt-ka ayaa laga yaabaa inuu lumiyo 90% adag, taasoo horseedaysa in lagu dhejiyo xamuulka taraafikada. Mistysts wax laga beddelay (E.G., SBS ama noocyo-modlus-modlus) iska caabiya shabakadaha polymer ee dejiya qaab-dhismeedka illaa 70 ° C ama ka sareeya.
Karkaraya iyo goynta:
Asphalt wuxuu gooyaa ka hor inta uusan gaarin qodobka karkaraya ee dhabta ah (ka hooseeya 470 ° C), sii deynta gaasas sun ah sida benzene. Markaa, barta karkaarka ayaa ka yar ka mid ah barta tooska ah (~ 204 ° C), kaas oo calaamadinaya khatarta inta lagu jiro kuleylka.

Saamaynta la taaban karo:

Fasaxa wadooyinka: Heerkulka xagaaga ee ka badan 50 ° C wuu jilci karaa asthalt, oo sababa isbarbardhiga joogtada ah sida horseed.
Xallinta: Adeegso danaashaha wax laga beddelay (tusaale ahaan, sbs) ama qaboojinta waxyaabaha lagu daro si kor loogu qaado xasilloonida heerkulka.
Marka la soo koobo, asphalt jilicsan oo uumiga sababo la xiriira burburka iyo u nugul kuleylka, taasoo lagama maarmaan u ah wax-cusub-qaadashada ee cimri dhererka.