Ukukhetha izixhobo ezifanelekileyo zokunyibilikisa i-asphalt kufuna ukuqwalaselwa kweemfuno zemveliso.

Okokuqala, qwalasela indlela yokufudumala yezixhobo, ezifana nokufudumeza kombane, ioli ye-thermal okanye i-steam, njl., Ukuqinisekisa ukusabalalisa ukushisa okufanayo kunye nobomi benkonzo ende;
Okwesibini, ingqwalasela kufuneka ihlawulwe ukuba amandla okunyibilika angakwazi ukuhlangabezana neemfuno zemveliso enkulu;
Okwesithathu, qwalasela iqondo lokuzenzekelayo kunye nokuba inkqubo yokulawula inokuphucula ngokufanelekileyo umgangatho wemveliso;
Ngokuqinisekileyo, ingqwalasela kufuneka ihlawulwe kuyilo lwesakhiwo somatshini ukukhusela ukuvuza kwezinto kunye nokuqinisekisa ukusebenza okukhuselekileyo.
Kuyacetyiswa ukuba wenze ukhetho olufanelekileyo olusekwe kwimeko yokwenyani yemveliso xa uthenga ukuhlangabezana neemfuno zakho zemveliso kunye nomgangatho.