Okokuqala, ukukhethwa kwempompo yokuhambisa kwisikhululo sokuxuba i-asphalt kufuneka kuhlangabezane neemfuno zexesha eliphezulu lokugalela i-asphalt ngexesha leyunithi ngexesha lokwakhiwa, ukuphakama okuphezulu, kunye nomgama othe tyaba othe tyaba. Ngexesha elifanayo, kufuneka kubekho umlinganiselo othile wogcino lobugcisa kunye nokuveliswa kwamandla, kwaye umthamo wokuvelisa ulungelelwaniso lukhethwa ukuba lube ngamaxesha angama-1.2 ukuya ku-1.5.
Okwesibini, iinkqubo ezimbini eziphambili zesikhululo sokuxuba i-asphalt, intshukumo kunye ne-hydraulics, kufuneka ibe yinto eqhelekileyo, kwaye kungabikho isandi esingaqhelekanga kunye nokungcangcazela ukuphepha i-aggregates enkulu kunye namaqhuma ngaphakathi kwesixhobo, ngaphandle koko kulula ukunamathela kwisondlo. izibuko lesikhululo sokuxuba okanye livalwe ngenxa ye-arching. Enye ingongoma kukuba xa isikhululo sokuxuba i-asphalt sikwindawo enye, ayifanelekanga ukusebenzisa iimpompo ezininzi kunye neepompo ezivela kubakhiqizi abaninzi ukuphepha ukuchaphazela ukusebenza kwayo okuqhelekileyo.
