Idan dankowar bitumen ya yi girma, juriya na juriya na ruwa na bitumen zai zama babba, gyare-gyaren spurting zai zama ƙarami, kuma za a rage yawan haɗuwa. Domin kawar da wannan matsala, tsarin gaba ɗaya shine ƙara diamita na bututun ƙarfe, amma wannan ba makawa zai rage saurin jet ɗin ruwa, ya raunana tasirin "tasiri-fasa-dare", da kuma sanya layin shiga cikin rashin daidaituwa. Domin inganta ingantaccen halayen fasaha na ginin kwalta, ya kamata a inganta halayen kwalta.

A halin yanzu, akwai wasu motocin bitumen da ke baza manyan motoci a kasuwa waɗanda ke da tasirin ƙetare mara gamsarwa kuma suna iya samun rashin daidaituwa a kwance a cikin ma'aunin ƙura. Halin rashin daidaituwa na gefe shine juzu'i mai jujjuyawa na Layer permeability. A wannan lokacin, ana iya ɗaukar wasu matakai don inganta daidaitattun daidaiton layin kwalta. Gudun babbar motar bitumen mai ba da ƙwalwar hankali tana buƙatar canza shi kawai a cikin kewayon tasiri, wanda ba zai yi tasiri ga daidaiton matakin kwalta na tsaye ba. Domin lokacin da saurin ya yi sauri, adadin kwalta da aka fantsama kowane lokaci naúrar ya zama babba, amma adadin kwalta da aka bazu akan jimillar fage na kamfanin ya kasance baya canzawa. Canje-canje a cikin sauri yana da tasiri mai girma akan daidaituwa na gefe.

Idan tsayin bututun fesa daga ƙasa ya yi yawa, zai rage tasirin tasirin bitumen kuma ya raunana tasirin "tasirin splash-homogenization"; idan tsayin bututun fesa daga ƙasa ya yi ƙasa sosai, zai rage tasirin fesa bitumen. Yakamata a daidaita adadin abin da ya mamaye zanen fan bisa ga ainihin halin da ake ciki don inganta tasirin feshin kwalta.