Txhawm rau daws qhov teeb meem ntawm kev tsis sib haum xeeb ntawm cov khoom sib xyaw thiab cov cement, kev tsom mus rau kev tiv thaiv, kev xaiv cov khoom siv thiab kev tshawb nrhiav cov khoom tuaj.Lub adaptability ntawm admixtures thiab cement yog ib qho teeb meem nyuaj, thiab qhov teeb meem ntawm incompatibility ntawm admixtures thiab cement tshwm sim.Cov neeg tsim khoom siv pob zeb siv sijhawm ntsuas: raws li qhov xwm txheej, raws li kev sim, tshuaj xyuas thiab nrhiav cov laj thawj, kho qhov sib xyaw ua ke, thiab txhim kho lub Hoobkas.slump, txo slump poob.Nws yog feem ntau yuav tsum tau kho tus nqi ntawm ya tshauv, nce tus nqi ntawm admixtures, nce cov kua theem residue ntawm lub admixture nyob rau hauv lub pob zeb, khaws cov dej-cement.
piv tsis hloov, thiab nce tus nqi ntawm cov cement, uas undoubtedly nce nqi tsev.Los yog lwm txoj kev sib ntxiv tuaj yeem txais yuav, uas yog, qhov poob ntawm lub Hoobkas yog tswj ntawm 80-100, thiab cov tshuaj sib xyaw ua ke yog sib zog sib zog rau li 2 feeb los kho rau 140 ua ntej siv ntawm qhov chaw tsim kho, uas yog kev lag luam ntau dua. thiab siv tau.Cov tuam txhab ua vaj tse feem ntau xav tau cov khoom siv ntxiv los hloov cov cement vim yog cov khoom lag luam loj ntawm cov cement, uas yog, cov neeg tsim khoom sib xyaw yuav tsum tau kho cov qauv, raws li cov cement siv los ntawm cov pob zeb ua lag luam los kho cov hom thiab cov nqi ntawm cov dej reducers thiab retarders. nyob rau hauv cov additives, los yog nce tus nqi ntawm Plasticizer, huab cua-entraining neeg sawv cev uas tsis muaj npuas, thiab lwm yam.
Kev txiav txim siab ntawm qhov sib xyaw ua ke kuj tseem yuav tsum tau coj mus rau hauv tus account lub sijhawm coagulation ntawm cov pob zeb, cov khoom sib xyaw muaj cov khoom xyaw retarding, qhov kub thiab txias poob dheev ntawm qhov kub siab dua, cov khoom siv hauv cov pob zeb ntau dhau, thiab cov mis tsis hloov. nyob rau hauv lub sij hawm, ua rau lub sij hawm ntev tsis ua hauj lwm ntawm cov pob zeb.Condensation yuav cuam tshuam rau lub zog ntawm pob zeb.Nyob rau lub caij ntuj sov, kev tsim kho yuav tsum zam lub sijhawm tav su ntawm qhov kub thiab txias, thiab txias cov khoom siv raw.Kev txiav txim siab ntawm cov xuab zeb sib piv hauv kev tsim vaj tsev sib xyaw ua ke yuav tsum tau hloov kho raws li qhov loj ntawm cov xuab zeb fineness thiab porosity ntawm coarse aggregate.Yog li, qhov teeb meem ntawm incompatibility ntawm cement thiab admixture tuaj yeem daws tau qee yam, thiab qhov poob yuav raug txo.
Post lub sij hawm: Lub Xya hli ntuj-25-2022