Yog hais tias cov bitumen viscosity siab, cov kua dej sib txhuam ntawm cov bitumen yuav loj, lub spurting molding yuav me me, thiab tus naj npawb ntawm overlaps yuav raug txo. Txhawm rau kom tshem tau cov teeb meem no, txoj kev dav dav yog nce txoj kab uas hla ntawm lub nozzle, tab sis qhov no yuav ua rau muaj cov khoom siv hluav taws xob tsis muaj zog ntxiv, thiab ua rau cov txheej txheem nkag tsis sib xws. Txhawm rau txhim kho cov yam ntxwv ntawm kev tsim kho asphalt zoo dua, cov yam ntxwv ntawm asphalt yuav tsum tau txhim kho.

Tam sim no, muaj qee qhov kev sib kis ntawm cov tsheb thauj khoom ntawm kev ua lag luam uas muaj kev cuam tshuam tsis zoo permeability thiab tej zaum yuav muaj kab rov tav tsis sib xws hauv txheej txheej permeability. Ib tug raug lateral unevenness yog transverse qauv ntawm cov permeability txheej. Lub sijhawm no, qee qhov kev ntsuas tuaj yeem raug coj los ua kom zoo dua qub ntawm asphalt txheej. Kev ceev ntawm lub siab ntse bitumen kis tau tus mob tsuas yog yuav tsum tau hloov nyob rau hauv qhov kev ua tau zoo, uas yuav tsis muaj kev cuam tshuam rau ntsug uniformity ntawm asphalt txheej. Vim hais tias thaum lub ceev ceev, tus nqi ntawm asphalt splashed ib chav tsev lub sij hawm yuav loj, tab sis tus nqi ntawm asphalt kis rau tag nrho cov cheeb tsam ntawm lub enterprise tseem unchanged. Cov kev hloov hauv kev nrawm muaj qhov cuam tshuam zoo rau kev sib luag ntawm sab nraud.

Yog tias qhov siab ntawm cov yeeb nkab tshuaj tsuag los ntawm hauv av siab dhau lawm, nws yuav txo qhov cuam tshuam quab yuam ntawm bitumen txau thiab ua rau tsis muaj zog ntawm "kev cuam tshuam txaws-homogenization" nyhuv; yog tias qhov siab ntawm cov yeeb nkab tshuaj tsuag los ntawm hauv av tsawg dhau, nws yuav txo qhov cuam tshuam ntawm bitumen txau. Tus lej sib tshooj ntawm cov kiv cua painting yuav tsum tau kho raws li qhov teeb meem tiag tiag los txhim kho cov nyhuv asphalt txau.