Txheej txheem cej luam ntawm Self-Leveling Compound

Self-leveling compound, cov ntaub ntawv tseem ceeb nyob rau hauv niaj hnub kev tsim kho flooring engineering, feem ntau yog tsim los ntawm Portland cement, nplua aggregates, functional polymers, thiab tshwj xeeb additives. Lawv qhov tshwj xeeb ntawm tus kheej-leveling cov cuab yeej tshwm sim los ntawm high-fluidity slurry tsim tom qab sib tov, uas tuaj yeem ua tiav qib hauv qab nqus los tsim cov hauv paus du nrog tuab ntawm 3mm txog 50mm.

Cov ntawv thov muaj xws li cov nroj tsuag muaj kev lag luam (xws li, cov plag tsev siab hauv cov chaw tsim khoom siv tsheb), cov chaw lag luam (piv txwv li, thaj chaw loj hauv cov chaw hnav-tiv taus hauv cov khw muag khoom), thiab cov phiaj xwm hauv tsev siab (xws li cov txheej txheej rau cov cua sov hauv qab).

Kev tsim kho kom zoo

Piv nrog rau cov txheej txheem mortar leveling, tus kheej-leveling tebchaw txhim kho kev tsim kho los ntawm 40% -60%. Lawv txoj kev kho sai sai ua rau lub sijhawm ua haujlwm luv luv, ua rau lawv zoo tagnrho rau "kev tsim kho hmo ntuj-hnub tom ntej" cov xwm txheej hauv cov haujlwm kho dua tshiab.

Vim li cas thiaj siv HPMC nyob rau hauv Tus Kheej-Leveling Compound? Kev ua tau zoo li cas?

a. Kev tswj xyuas dej

HPMC molecules adsorb dej los ntawm hydrogen bonds, tsim ib tug peb-dimensional network uas ua rau kom mortar dej tuav mus rau ntau tshaj 90% (piv rau 75% tsis muaj HPMC). Nyob rau hauv qhov chaw kub kub (> 30 ° C), xaiv HPMC nrog gelation kub ≥65 ° C ncua dej evaporation, tiv thaiv lub zog poob vim tsis txaus cov cement hydration.

b. Rheological Property Optimization

• Tswj Flow: Tsawg-viscosity HPMC (piv txwv li, 400Mpas) txo cov kev ntxhov siab, ua tiav cov txiaj ntsig thawj zaug ntawm 180-220mm rau nyias txheej tus kheej-leveling (3-5mm); high-viscosity hom (xws li, 15000Mpas) txhim khu thixotropy, tiv thaiv aggregate sedimentation nyob rau hauv tuab-txheej tsim (10-50mm) kom ntseeg tau tias uniform ntom.

• Synergistic Effect: Thaum sib xyaw nrog polycarboxylate dej reducers, HPMC inhibits kev sib cais. Ntawm 0.3% dej reducer thiab 0.12% HPMC, 30-feeb txaus poob ≤10%, ua tau raws li lub sij hawm-dependent flow yuav tsum tau rau tus kheej-leveling.

c. Shrinkage thiab Cracking Inhibition

Los ntawm ncua sij hawm cov cement hydration (ntev lub sij hawm pib lub sij hawm los ntawm 15-30 feeb), HPMC txo qis kev ntxhov siab thaum ntxov los ntawm ntau dua 30%.Hauv kev sim ziab kom qhuav, mortars nrog HPMC nthuav tawm 28-hnub shrinkage tus nqi ntawm 0.018%, txo qis dua 0.035% rau cov qauv tsis-HPMC, txo qis micro-cracking.

Yuav ua li cas xaiv HPMC kom phim qhov sib txawv ntawm Tus Kheej Tus Kheej Cov Txheej Txheem Kev Tsim Kho?

Kev lag luam qib HPMC raug cais los ntawm viscosity ntawm lawv 2% aqueous tov rau hauv qis-viscosity ( 30000Mpas), catering rau ntau yam kev tsim kho.

Kev ntsuas qhov tseem ceebrau kev sib txawvScenario

Formulation Piv txwv (Gypsum-Based Self-leveling):Base Composition: α-hemihydrate gypsum 60%, calcium carbonate 30%, quartz xuab zeb (80-120 mesh) 10%; Additives: HPMC (20000mPa·s, 0.18%), retarder (tartaric acid, 0.05%), dej reducer (melamine-based, 0.3%.(Nov yog rau koj siv xwb) 

Xaus

Raws li ib tug tseem ceeb functional additive nyob rau hauv tus kheej-leveling tebchaw,HPMCcuam ​​tshuam cov khoom ua tau zoo thoob plaws hauv kev npaj, kev tsim kho, thiab kev pabcuam lub neej. Nrog nce kev thov rau flooring precision nyob rau hauv lub tsev industrialization,HPMCkev xaiv thiab kev siv tshuab yuav ua kom zoo dua qub thiab txawj ntse.