Saamaynta xarunta isku dhafka asphalt lama dhayalsan karo. Waxa kale oo ay saameyn weyn ku leedahay waxtarka kuleylka ee tuubada gudbinta asphalt. Tani waa sababta oo ah tilmaamayaasha waxqabadka muhiimka ah ee asphalt, sida viscosity iyo sulfur content, waxay si dhow ula xiriiraan saldhigga isku dhafka asphalt. Guud ahaan, marka uu bato viscosity-ku, ayaa ka sii daraya saamaynta atomization, taas oo si toos ah u saameeya waxtarka shaqada iyo isticmaalka shidaalka. Marka uu heerkulku kordho, cufnaanta saliidda culus ayaa si tartiib tartiib ah hoos ugu dhacda, markaa saliidda viscosity-ga sare waa in lagu kululeeyaa si habsami leh iyo atomization.

Sidaa darteed, marka lagu daro fahamka tilmaamayaasha caadiga ah markaad dooranayso, waa inaad sidoo kale kasbato qalooca viscosity-heerkulka si aad u hubiso in kuleylku uu ka dhigi karo daamurku inuu gaaro viscosity uu u baahan yahay gubi ka hor atomization. Markii la kormeeray nidaamka wareegga asphalt-ka, waxaa la ogaaday in daamurka dhuumaha dhuumaha ku jira uu adkaaday sababtoo ah heerkulka dhuumaha gaadiidka asphalt ma buuxin shuruudaha.
Sababaha marka la falanqeeyo, sababaha ugu waaweyn waa kuwan soo socda.
1. Taangiga saliidda ee heerka sare ee saliidda kulaylka ayaa aad u hooseeya, taasoo keentay wareegga liidata ee saliidda kulaylka;
2. Tuubbada gudaha ee tuubada laba-lakabka ah waa eccentric;
3. Dhuumaha saliidda wareejinta kulaylka aad bay u dheer tahay;
4. Dhuumaha saliida kulaylka wareejinta si fiican looma ilaaliyo. Tallaabooyinka daboolka habboon, iwm, kuwani waa arrimaha ugu muhiimsan ee saameeya saameynta kuleylka.