HydroxyPropyyl methylulose yog dej-soluble polymer compound, tseem hu ua dej-soluble cob lossis dej-soluble polymer. Nws tuab tuab qhov sib xyaw los ntawm nce lub viscosity ntawm cov dej sib tov. Nws yog cov khoom siv hydrophilic polymer. Nws tuaj yeem yog yaj hauv dej los ua kev daws teeb meem lossis kev tawg. Kev sim qhia tias thaum cov nqi ntawm Naphthalce-based superplasticizer nce, qhov txuam nrog superplasticizer yuav txo cov kev sib xyaw ua ke tshiab. Qhov no yog vim tias Naphthalene Superplastictizer yog lub surfactant. Thaum tus neeg sawv cev dej txo rau lub tshuaj khib nyiab ntxiv, cov dej txo tus neeg sawv cev, kom lub npoo ntawm cov hloov pauv tib yam. Qhov hluav taws xob hluav taws xob disintter raws cov qauv flocculation tsim los ntawm Caas hais tawm, thiab cov dej qhwv hauv cov qauv yog tso tawm, uas yog ib feem ntawm qhov ploj ntawm cov cement. Nyob rau tib lub sijhawm, nws tau pom tias nrog kev nce HPMC cov ntsiab lus, cov dispersion tsis kam ntawm tshiab cement zoo dua thiab zoo dua.
Lub zog cov khoom ntawm cov ua vaj tse:
HPMC Underwater Qhob Admixture yog siv nyob rau hauv High Choj Foundwation Engineering, thiab tus qauv tsim muaj zog yog C25. Raws li qhov ntsuas yooj yim, qhov ntau ntawm cov ntseeg yog 400kg, tus nqi ntawm HPMC yog li ntawm HPMC yog 0.42, cov xuab zeb piv yog 40%, Thiab cov zis ntawm naphyyl superplasticizer yog 8% ntawm cov nyiaj xis mas. , Cov pob zeb ua vaj tse nyob rau hauv cov huab cua rau 28 hnub muaj lub zog nruab nrab ntawm 42.6MPA, thiab cov pob zeb ua haujlwm hauv 60 hli muaj lub zog nruab nrab ntawm 36.4 MPA.
1. Qhov kev sib ntxiv ntawm HPMC tau pom tseeb retarding cuam tshuam rau ntawm cug sib tov. Nrog rau kev nce ntawm HPMC cov ntsiab lus, lub sijhawm teem sijhawm cug maj. Raws li tib HPMC cov ntsiab lus, lub tshuaj khib tsim hauv qab dej yog qhov zoo dua li lub tshuaj khib tsim hauv huab cua. Lub sijhawm ruaj khov ntawm molding yog ntev dua. Cov yam ntxwv no pab txhawb hauv qab dej ua ke twj tso kua mis.
2. Cov xis mas tshiab sib xyaw nrog hydroxypropylencellulose muaj kev ua tau zoo thiab ntshav siab.
3. Cov ntsiab lus ntawm HPMC thiab cov dej xav tau ntawm kab cort tsawg zuj zus ua ntej thiab tom qab ntawd nce ntau.
4. Qhov txuam nrog tus neeg sawv cev dej kom zoo dua qhov teeb meem ntawm cov tshuaj khib, tab sis nws yuav tsum tau tswj cov tshuaj khib, tab sis nws yuav tsum tau tswj cov dej cug, nws yuav tsum tau tswj kav dej txau ntawm freshly sib xyaw ua ke.
5. Muaj me ntsis sib txawv hauv cov qauv ntawm cov cement cov hnoos qeev sib xyaw nrog cov qauv HPMC thiab qhov sib txawv ntawm cov cement cov hnoos qeev hauv pouring dej thiab huab cua. Tus qauv tsim tom qab 28 hnub Unlewater yog me ntsis xoob. Qhov laj thawj tseem ceeb yog qhov ntxiv ntawm HPMC ntau ntau txo qhov poob thiab dispersion ntawm cov nqaij ntsuab thaum lub sij hawm nchuav rau hauv dej sib xyaw ntawm cov xis zeb pob zeb. Hauv txoj haujlwm, tus nqi HPMC yuav tsum raug txo kom ntau li ntau tau thaum ua rau cov nyhuv tsis-dispersion hauv qab dej.
6. Kev sib xyaw ntawm HPMC Underwater Qhob admixture, kev tswj hwm tus nqi yog pab rau kev txhim kho lub zog. Cov haujlwm sim tau qhia tias cov pob zeb tsim hauv dej muaj lub zog piv ntawm 84.8% ntawm cov uas tsim hauv huab cua, thiab cov nyhuv tseem ceeb dua.
Lub Sijhawm Post: Jun-16-2023