Kev tiv thaiv kev tawg yog ib qho tseem ceeb ntawm kev ntsuas kev ntsuas los ntsuas qhov zoo ntawm cov tshuaj tiv thaiv kev tawg.Hydroxypropyl methyl celluloseyog ib qho tshuaj polymer uas yaj tau hauv dej, tseem hu ua cov resin uas yaj tau hauv dej lossis cov polymer uas yaj tau hauv dej. Nws ua rau kom muaj qhov sib xws ntawm cov khoom sib tov los ntawm kev ua kom cov viscosity ntawm cov dej sib tov. Nws yog ib hom khoom siv hydrophilic polymer, uas tuaj yeem yaj hauv dej thiab tsim cov kua lossis cov kua uas yaj tau. Cov kev sim qhia tau tias thaum cov tshuaj naphthalene system superplasticizer ntau ntxiv, qhov ntxiv ntawm superplasticizer yuav txo qhov tsis kam ntawm cov cement mortar tshiab. Qhov no yog vim tias naphthalene series cov neeg ua haujlwm txo dej zoo yog cov neeg sawv cev ntawm qhov chaw ua haujlwm, thaum cov neeg sawv cev txo dej ntxiv rau hauv mortar, cov neeg sawv cev txo dej hauv cov cement particle nto ntawm cov cement particles nrog tib lub nqi, cov qauv hluav taws xob repulsion flocculation ntawm cov cement particles tsim los ntawm kev faib, qhwv hauv cov qauv ntawm kev tso dej, yuav ua rau poob ntawm ib feem ntawm cov cement. Tib lub sijhawm, nws pom tias nrog kev nce ntawm HPMC cov ntsiab lus, qhov tiv thaiv kev tawg ntawm cov cement mortar tshiab zoo dua thiab zoo dua.
Cov yam ntxwv ntawm lub zog ntawm cov pob zeb ua vaj tse:
Cov tshuaj sib xyaw ua ke hauv qab dej HPMC uas tsis tawg tau siv rau hauv kev tsim kho choj ntawm txoj kev loj, thiab qib tsim lub zog yog C25. Tom qab kev sim yooj yim, cov tshuaj cement yog 400kg, cov tshuaj sib xyaw silica fume 25kg / m3,HPMCQhov zoo tshaj plaws yog 0.6% ntawm cov tshuaj cement, qhov sib piv ntawm dej thiab cement yog 0.42, qhov sib piv ntawm xuab zeb yog 40%, qhov ua tau zoo ntawm naphthalene high-efficiency dej txo cov tshuaj yog 8% ntawm cov tshuaj cement, cov qauv pob zeb hauv huab cua yog 28d, qhov nruab nrab lub zog yog 42.6MPa, Qhov nruab nrab lub zog ntawm cov pob zeb hauv qab dej uas poob siab ntawm 60mm hauv dej yog 36.4mpa rau 28 hnub, thiab qhov sib piv ntawm lub zog ntawm cov pob zeb hauv dej thiab cov pob zeb hauv huab cua yog 84.8%, qhia txog qhov cuam tshuam tseem ceeb.
1. Kev ntxiv HPMC muaj qhov cuam tshuam pom tseeb rau cov khoom sib xyaw ua ke. Nrog rau kev nce ntxiv ntawm HPMC koob tshuaj, lub sijhawm teeb tsa ntawm cov khoom sib xyaw tau ntev zuj zus. Nyob rau hauv tib qho xwm txheej ntawm HPMC koob tshuaj, lub sijhawm teeb tsa ntawm cov khoom sib xyaw hauv qab dej ntev dua li ntawm huab cua. Qhov no yog qhov zoo rau kev siv cov pob zeb hauv qab dej.
2, sib xyaw nrog hydroxypropyl methyl cellulose ntawm cov cement mortar tshiab muaj kev sib koom ua ke zoo, yuav luag tsis muaj qhov tshwm sim los ntshav.
3, HPMC koob tshuaj thiab cov dej siv rau hauv av ua ntej txo qis thiab tom qab ntawd nce ntxiv ntau.
4. Kev siv cov dej txo qhov teeb meem ntawm kev xav tau dej ntau ntxiv rau cov mortar, tab sis nws yuav tsum tau tswj hwm kom zoo, txwv tsis pub nws qee zaum yuav txo qhov kev tiv thaiv dej hauv qab ntawm cov cement mortar tshiab.
5. Muaj qhov sib txawv me ntsis ntawm cov qauv ntawm HPMC sib xyaw ua ke cov cement net slurry thiab cov qauv dawb paug, thiab muaj qhov sib txawv me ntsis ntawm cov qauv thiab kev sib xyaw ntawm cov qauv cement nchuav dej thiab cov qauv cement nchuav cua. Cov qauv molding hauv qab dej 28d yog xoob me ntsis. Qhov laj thawj tseem ceeb yog tias kev ntxiv HPMC txo qhov poob thiab kev sib kis ntawm cov cement thaum lub sijhawm nchuav dej, tab sis kuj txo qhov degree ntawm kev sib xyaw ntawm cov cement. Hauv qhov project, nyob rau hauv qhov xwm txheej ntawm kev ua kom ntseeg tau tias cov nyhuv tsis sib kis hauv qab dej, qhov sib xyaw ntawm HPMC raug txo kom tsawg li ntau tau.
6, ntxivHPMChauv qab dej tsis tawg cov khoom sib xyaw ua ke, tswj qhov ntau ntawm lub zog zoo, qhov project pilot qhia tau hais tias qhov sib piv ntawm lub zog ntawm kev tsim cov pob zeb hauv dej thiab kev tsim hauv huab cua yog 84.8%, qhov cuam tshuam tseem ceeb dua.
Lub sijhawm tshaj tawm: Plaub Hlis-25-2024