Ho ea ka liphuputso tse fetileng le lipatlisiso tsa masimong, tsela ea asphalt e angoa ke ho fetoha, ho monya, oxidation le karabelo ea photochemical ea tsela, 'me karo-karolelano ea asphalt e theoha haholo tlas'a maemo a botsofali a pele, e leng se bakang tsela e brittle le e pshatlehang. Ka khoholeho e eketsehileng ea asphalt, tsela e itekanetseng ea sekontiri e pepesa litaba tsa eona. Sebaka sa asphalt se kena sethaleng sa botsofali ka lebaka la ho rusolla ho tsoelang pele le boemo ba leholimo, moo majoe a pepesehelang likaroloana tse nyenyane holim'a tsela.

Nakong ea ts'ebetso ea botsofali, ho senyeha le matla a sebopeho sa tsela e katiloeng a fokotseha. Qetellong, mahlomola a mangata a litsela a hlaha ka mokhoa oa mapetsong a mela, mapetsong a li-alligator, likoti le ho rutting. Ts'ebetso ena e fokotsa haholo viscosity le brittleness, e eketsa ductility le ho feto-fetoha ha maemo, 'me e etsa hore asphalt e se ke ea senya le ho senyeha.
Ho fapana le likhoele tsa khale tsa litiiso, ts'ebeliso e le 'ngoe ea karolo ea tlhahlobo ea ntlafatso ea asphalt e kenella ka tselaneng ho khutlisa le ho khutlisa sekontiri le sekontiri se lahlehileng ka lebaka la bokaholimo ba oxidation bo tlase haholo ho feta asphalt e sirelelitsoeng. E boetse e tiisa le ho sireletsa tselana ho tloha metsing, mahlaseli a letsatsi le litšila tsa lik'hemik'hale, e ntlafatsa haholo ho tšoarella, bophelo le ho fokotsa ho khahleha ha asphalt. Baetsi ba motsoako oa asphalt ba u hopotsa hore tlhokomelo e nepahetseng ke senotlolo sa ho sireletsa asphalt ho tloha linthong tse ka ntle tse senyang le ho senya.