Okokuqala, sebenzisa i-28 xa uphahla lulinganisa i-35mm ubukhulu besamente.

Gcoba umaleko wokuqala wethayile ye-asphalt, i-adhesive ijonge phezulu, kwaye uyigcabe ngokuthe ngqo eluphahleni ecaleni komthambeka wophahla. Kwelinye icala le-cornice engcanjini yodonga, umaleko wokuqala wethayile ye-asphalt udlula i-5 ukuya kwi-10 mm. Lungisa umhlaba ngesikhonkwane esingama-50.8 mm ukusuka ezantsi kweziphelo zombini kunye ne-25.4 mm ukusuka ecaleni, uze uyibeke ngokulinganayo kwicala elithe tye phakathi kwezikhonkwane ezimbini. Beka izikhonkwane ezi-2 uze ubambe umgca othe tye.

Beka umaleko wokuqala wethayile ye-asphalt, sula i-167mm yomaleko wokuqala wethayile ye-asphalt, uze ubeke yonke ithayile ye-asphalt. Lungelelanisa isitena sokuqala se-asphalt esiphelweni sodonga kunye nomphetho womaleko wokuqala wesitena se-asphalt ecaleni kwe-cornice. Lungisa ngezikhonkwane kwi-60.8mm ukusuka kwiziphelo zombini ukuya ezantsi kunye ne-35.4mm ukusuka ecaleni, uze ufake ezinye izikhonkwane ezimbini kwicala elithe tye lezikhonkwane ezimbini uze uqhawule umgca othe tye.

Beka umaleko wesibini wethayile ye-asphalt. Icala lomaleko wokuqala wesitena esijongene ne-asphalt yomaleko wesibini lijikeleziswa sisiqingatha segqabi kwicala lomaleko wokuqala wesitena esijongene ne-asphalt. Umzantsi womaleko wesibini wethayile ye-asphalt uthambile kunye nomphezulu wejoyinti yokuhombisa yomaleko wokuqala wethayile ye-asphalt. Sebenzisa umgca othe tye otyumkileyo kumaleko wokuqala wethayile ye-asphalt ukwenza umzantsi womaleko wesibini wethayile ye-asphalt uhambelane ne-cornice, kwaye ulungise umaleko wesibini wethayile ye-asphalt ngezikhonkwane.

Beka umaleko wesithathu wethayile ye-asphalt, usike lonke ibala lomaleko wokuqala wethayile ye-asphalt yomaleko wesithathu wethayile ye-asphalt, uyidibanise nomaleko wokuqala wethayile ye-asphalt yomaleko wesibini wethayile ye-asphalt, yenza umphetho ongezantsi womaleko wesithathu wethayile ye-asphalt ugutyungelwe phezulu kwekhonkco lokuhombisa lomaleko wesibini wethayile ye-asphalt, uze uyibeke kwaye uyilungise ngokulandelelana ngomaleko wesithathu wonke wethayile ye-asphalt.

Gquma iithayile ze-asphalt kumjelo. Iithayile ze-asphalt zophahla oludibanayo mazibekwe kumjelo ngaxeshanye, okanye icala ngalinye lizakhiwe ngokwahlukeneyo, kwaye mazibekwe kwi-75mm ukusuka kumgca osembindini womjelo. Emva koko gquma ithayile ye-asphalt yomjelo phezulu kwelinye lamacango ophahla uze udlule phezu komjelo, ukuze ithayile yokugqibela ye-asphalt yomjelo yomaleko idlulele kuphahla olusecaleni ubuncinane i-300 mm, uze ugqume ithayile ye-asphalt yomjelo ecaleni kwamacango ophahla asecaleni uze udlulele kumjelo kunye nethayile ye-asphalt yomsele wokuhambisa amanzi ebekwe ngaphambili, eza kulukwa kunye. Ithayile ye-asphalt yomsele mayiqiniswe ngokuqinileyo kumsele, kwaye ithayile ye-asphalt yomsele mayiqiniswe ngokuyilungisa nokuyivala umsele.

Xa ubeka iithayile ze-asphalt ezikwi-ridge, qala ulungise kancinci iithayile zokugqibela ze-asphalt ezibekwe phezulu kwiindawo ezimbini eziphezulu zomqolo otyebileyo kunye nomqolo, ukuze iithayile ze-asphalt ezikwi-ridge zigubungele ngokupheleleyo iithayile ze-asphalt eziphezulu, kwaye ububanzi obudibeneyo bee-ridges kumacala omabini omqolo bufane. Emva kokuba isikhonkwane silungisiwe, gcoba ithayile ye-asphalt eveziweyo ngeglue ye-asphalt.