Hydroxypropyl methyl cellulose (HPMC) yog ib qho khoom siv feem ntau siv hauv cov cement-based mortars los txhim kho lawv cov kev tsis sib haum xeeb. Thaum ntxiv rau hauv cov tshuaj khib nyiab, HPMC tsim cov txheej txheem tiv thaiv ib puag ncig cov cement, uas tiv thaiv lawv los ntawm kev sib xyaw ua ke thiab tsim cov agglomerates. Qhov no ua rau muaj kev sib faib ntau dua ntawm cov cement hais thoob plaws hauv cov tshuaj khib nyiab, uas ua rau nws txoj kev ua tau zoo tag nrho.
Lub dispersion tsis kam ntawm cement-based mortars yog qhov tseem ceeb vim tias nws cuam tshuam rau kev ua haujlwm thiab lub zog ntawm cov khoom kawg. Thaum cov cement particles clump ua ke, lawv tsim voids nyob rau hauv mortar mix, uas yuav ua rau cov qauv tsis muaj zog thiab txo nws cov durability. Tsis tas li ntawd, clumping tuaj yeem ua rau lub mortar nyuaj rau kev ua haujlwm nrog, uas tuaj yeem ua rau muaj teeb meem thaum tsim kho.
HPMC daws cov teeb meem no los ntawm kev txhim kho cov dej ntws thiab kev ua haujlwm ntawm cov tshuaj khib nyiab. Los ntawm kev tsim cov txheej txheem tiv thaiv ib puag ncig cov khoom cement, HPMC txo cov dej uas xav tau kom ua tiav cov haujlwm sib xws, uas ua rau txo qis kev pheej hmoo ntawm kev sib cais thiab los ntshav. Qhov no ua rau muaj ntau homogenous thiab cohesive sib tov, uas yooj yim rau kev thov thiab ua tiav.
Zuag qhia tag nrho, qhov sib ntxiv ntawm HPMC rau cov cement-based mortars tuaj yeem txhim kho lawv cov kev ua tau zoo los ntawm kev txhim kho lawv cov kev tsis sib haum xeeb, kev ua haujlwm, thiab ua haujlwm ntev.
Post lub sij hawm: Apr-23-2023