Anti-dispersion yog ib qho tseem ceeb kev ntsuas ntsuas los ntsuas qhov zoo ntawm tus neeg sawv cev tiv thaiv dispersion.Hydroxypropyl methylcellulose yog cov dej-soluble polymer compound, tseem hu ua dej-soluble resin lossis dej-soluble polymer.Nws nce qhov sib xws ntawm qhov sib tov los ntawm kev ua kom cov viscosity ntawm cov dej sib tov.Nws yog cov khoom siv hydrophilic polymer.Nws tuaj yeem yaj hauv dej los tsim kev daws teeb meem lossis dispersion.Cov kev sim qhia tau hais tias thaum tus nqi ntawm naphthalene-based high-efficiency superplasticizer nce, qhov sib ntxiv ntawm superplasticizer yuav txo tau cov dispersion tsis kam ntawm freshly mixed cement mortar.Qhov no yog vim hais tias cov naphthalene-raws li high-efficiency dej reducer yog surfactant.Thaum cov dej reducer ntxiv rau hauv cov mortar, cov dej reducer yuav tau taw qhia rau ntawm cov cement hais kom ua rau cov cement seem muaj cov nqi tib yam.Qhov hluav taws xob repulsion no ua rau cov cement particles tsim Cov qauv flocculation ntawm cov cement yog dismantled, thiab cov dej qhwv hauv cov qauv raug tso tawm, uas yuav ua rau poob ntawm ib feem ntawm cov cement.Nyob rau tib lub sijhawm, nws pom tau hais tias nrog kev nce ntawm HPMC cov ntsiab lus, qhov kev tsis sib haum xeeb ntawm cov cement mortar tshiab tau zoo dua thiab zoo dua.
01. Qhov sib ntxiv ntawm HPMC muaj qhov cuam tshuam pom tseeb ntawm cov tshuaj khib nyiab sib tov.Nrog rau qhov nce ntawm HPMC cov ntsiab lus, lub sijhawm teeb tsa ntawm mortar txuas ntxiv txuas ntxiv mus.Raws li tib cov ntsiab lus HPMC, cov mortar tsim nyob rau hauv dej yog sai dua li nyob rau hauv huab cua Moulding yuav siv sij hawm ntev dua.Cov yam ntxwv no muaj txiaj ntsig zoo rau kev siv dej hauv qab dej.
02. Qhov sib ntxiv ntawm cov dej txo tus neeg sawv cev pab txhim kho qhov teeb meem ntawm cov dej xav tau ntau dua rau cov tshuaj khib nyiab, tab sis nws cov tshuaj yuav tsum tau tswj kom tsim nyog, txwv tsis pub cov dej tsis sib haum ntawm cov dej sib xyaw ntawm cov cement mortar tshiab yuav qee zaum raug txo.
03. Tsis tshua muaj qhov sib txawv ntawm cov qauv ntawm cov cement paste specimen tov nrog HPMC thiab cov qauv dawb paug, thiab muaj qhov sib txawv me ntsis ntawm cov qauv thiab qhov ntom ntawm cov cement paste specimen poured hauv dej thiab hauv huab cua.Cov qauv tsim hauv qab dej rau 28 hnub yog me ntsis nkig.Qhov laj thawj tseem ceeb yog qhov sib ntxiv ntawm HPMC zoo heev txo qhov poob thiab tawg ntawm cov cement thaum nchuav hauv dej, tab sis kuj txo cov compactness ntawm cement pob zeb.Nyob rau hauv qhov project, nyob rau hauv cov xwm txheej ntawm kev ua kom cov nyhuv ntawm tsis-dispersion nyob rau hauv dej, qhov ntau npaum ntawm HPMC yuav tsum tau txo kom ntau li ntau tau.
HPMC underwater non-dispersible qhob admixture yog siv nyob rau hauv tus choj foundation engineering ntawm txoj kev nthuav dav, thiab cov qauv tsim lub zog yog C25.Raws li qhov kev sim yooj yim, tus nqi ntawm cov cement yog 400kg, cov silica fume compounded yog 25kg / m3, qhov zoo ntawm HPMC yog 0.6% ntawm cov cement, cov dej-cement piv yog 0.42, xuab zeb tus nqi yog 40%. thiab cov zis ntawm naphthalene-raws li high-efficiency dej reducer yog Cov cement ntau yog 8%, cov qauv ua vaj tse nyob hauv huab cua rau 28 hnub, qhov nruab nrab lub zog yog 42.6MPa, cov pob zeb hauv qab dej nrog qhov poob siab ntawm 60mm rau 28 hnub. , qhov nruab nrab lub zog yog 36.4MPa, lub zog piv ntawm cov dej-tsim pob zeb thiab cov huab cua tsim ua vaj tse 84.8%, cov nyhuv tseem ceeb dua.
Post lub sij hawm: Apr-24-2023