Qhov zoo ntawm asphalt pavement tsuas yog nyob ntawm qhov zoo ntawm asphalt thiab nws paving. Lub ntsiab cai ua haujlwm ntawm batched asphalt sib tov cog yog tias tom qab lub hauv paus tswj chav teeb meem pib qhov kev hais kom ua, qhov sib sau ua ke ntawm cov khaub thuas txias yuav poob rau hauv cov txhab kub. Txhua qhov sib xyaw ua ke thiab hmoov yog ntsuas los ntawm hluav taws xob nplai hauv qhov ntsuas qhov hnyav, tom qab ntawd muab tso rau hauv qhov sib tov, thiab qhov hnyav hnyav kub asphalt txau rau hauv lub tov khoom. Tom qab cov khoom siv ntau tau do, cov cov khoom tiav tiav raug tsim thiab xa tawm mus rau lub plhaw. Thaum kawg, cov khoom tiav tiav tau muab tso rau hauv lub thoob khib nyiab hla lub qhov rooj tawm paug. Kev sib koom ua ke ntawm kev thauj mus los, kev ziab, tshuaj ntsuam, hmoov thiab kev thauj mus los asphalt yog cov tswj tau thiab nqa tawm hauv kev voj voog.
Kev ua tau zoo ntawm kev tsim khoom zoo ntawm asphalt pob zeb ua kev sib xyaw cog yog qhov tseem ceeb hauv nws qhov ntsuas-kev nyob ruaj khov thiab tus nqi ntws, thiab tus nqi ruaj khov thiab ntws tus yam ntxwv lub qhov ruaj khov thiab tiv thaiv kev cuam tshuam cov peev xwm ntawm qhov sib xyaw ntawm qhov kub, thiab qhov tseeb xav txog cov khoom siv. ntawm asphalt pob zeb ua Kev taw qhia ntawm lub zog thiab deformability ntawm ib qho khoom siv tom qab nws tsim. Yog li, peb yuav tsum tswj cov khoom sib xyaw kom zoo los ntawm kev ua hauv qab no.
I.Kev sib xyaws
Cov txheej txheem sib tsoo yog cov pob zeb tawg nrog qhov loj me ntawm 2.36-25mm, uas yuav tsum tau sib cuam tshuam los ntawm cov khoom sib xyaw ntawm cov pob zeb saum npoo av kom muaj kev ruaj khov thiab tiv taus kev txav los ntawm kev txhuam. Qhov no yuav tsum tau hais tias nws cov khoom siv kho tshuab yuav tsum ua tau raws li cov cuab yeej kev xav tau ntawm asphalt pob zeb, thiab muaj qee yam duab (cov duab cuam tshuam rau pob zeb ua kev ntom ntom ntom ntom ntab, kev kub siab ruaj khov thiab pua kev teeb tsa lub zog). Cov txheej txheem ntxhib yuav tsum ua rau lub voos xwm txheej nrog qhov chaw ntxhib thiab pob kws tom qab tsoo. Tus pin flake cov ntsiab lus yog tsawg, thiab muaj kev sib txhuam ntau dua ntawm nruab nrab ntawm aggregates.
II.Fine cov tso sib xyaws
Cov Khoom Sib Sau Zoo yog hais txog cov pob zeb tawg nrog qhov loj me me ntawm 0.075～2.36 hli. Cov ore ballast thiab cov hmoov ntxhia yuav tsum yog huv thiab tsis muaj av nplaum thiab lwm yam khoom muaj teeb meem. Yuav tsum muaj cov npoo thiab cov fab kom nce ntxiv thiab txo cov txiaj ntsig sib cuam tshuam ntawm cov khoom hais. Porosity ntawm aggregates nce qhov ruaj khov ntawm kev sib tov.
III.Asphalt
Ua ntej siv, tshawb xyuas seb qhov ntsuas ntau ntawm asphalt ua tau raws li cov kev xav tau ntawm kev tsav tsheb roj av asphalt, suav nrog nkag, muaj zog, muag taw tes, flash point, melting degree, ntsiab lus siv quav ciab, thiab zaj duab xis cub cua sov ntsuas qhov ntsuas.
Daim paib asphalt yuav tsum tau xaiv raws li huab cua hauv cheeb tsam. Qhov siab dua daim ntawv lo rau asphalt, ntau dua qhov kev nkag mus thiab qhov qis dua qhov sib thooj. Kev ntsuas kub tsawg dua, qhov zoo dua qhov qis-tawg kub tawg tsis kam ntawm txoj kev tsim txoj hauv kev no, tab sis tsis zoo rau qhov siab-siab qhov kev nyab xeeb. Feem ntau, ntau hom asphalt raug xaiv raws li cov txheej sib txawv, thiab txheej txheej saum npoo yuav tsum yog nyias kom txhim kho qhov tawg tsis kam ntawm cov txheej saum npoo. Cov kab hauv nruab nrab thiab qis dua siv thicker asphalt los txhim kho lawv cov rutting tsis kam.
IV.Mixing ratio tswj
Qhov tsim qauv ntawm lub hom phiaj sib tov sib xyaw yuav tsum tau xaiv los ntawm kev ntsuas ib zaug. Tom qab qhov ntau ntawm txhua qib tau txiav txim siab, kev tshuaj ntsuam Marshall yog nqa tawm los txiav txim siab seb kev noj tshuaj asphalt zoo tshaj plaws, yog li txiav txim siab qhov kev faib ua feem ntawm txhua qhov kev qhia tshwj xeeb.
V.Kev tswj qhov kub thiab txias
Nquag, cov cua sov asphalt yog tswj los ntawm 150 ～ 170 ℃, qhov kub ntawm cov ntxhia pob zeb yog 10 ～ 20 ℃ siab tshaj qhov ntawm asphalt, thiabkev asphaltsib tov yog 140 ～ 155 ℃. Qhov kub ntawm cov hmoov tiav tas nrog kev cuam tshuam ncaj qha rau qhov zoo ntawm paving thiab dov. Thaum thauj mus rau paver, qhov kub thiab txias yuav tsum tau tswj ntawm 135 ～ 150 ℃, qhov pib dov lub ntsuas kub yuav tsum tsis txhob qis dua 135 ℃, qhov kub kawg yuav tsum tsis kub tsawg dua 110 ℃, thiab qhov qhib kev lag luam yuav tsum tsis txhob siab dua 60 ℃. Txheeb xyuas qhov ntsuas kub ntawm cov khoom tiav nyob rau txhua lub sijhawm, thiab cov lus rov tuaj rau lub chav ua haujlwm kom tswj tau qhov kub.
