Masonry yog ib qho tseem ceeb thiab tseem ceeb ntawm kev tsim kho uas tau nyob ib puag ncig rau ntau pua xyoo. Nws suav nrog kev siv cib, pob zeb, thiab lwm yam khoom siv los tsim cov qauv ruaj khov thiab muaj zog. Txhawm rau kom ntseeg tau tias qhov zoo ntawm masonry mortar, ntau yam additives yog siv los ua kom nws lub zog thiab ua haujlwm tau zoo. Ib qho ntxiv yog cellulose ether, uas tau pom tias muaj txiaj ntsig zoo hauv kev sib xyaw ua ke ntawm cov pob zeb sib xyaw. Daim ntawv no tham txog cov khoom thiab qhov zoo ntawm cellulose ether mix aggregate masonry mortar.
Cellulose ethers yog muab los ntawm cov nroj tsuag fibers thiab feem ntau yog siv nyob rau hauv kev tsim kho teb raws li additives rau cement-based cov ntaub ntawv hauv tsev. Nws yog tsim los ntawm ntuj cellulose uas tau hloov kho tshuaj los txhim kho nws cov khoom. Cellulose ether yog cov dej-soluble polymer uas tuaj yeem muab ntxiv rau ntawm cov theem sib txawv ntawm kev npaj mortar los txhim kho kev ua haujlwm ntawm mortar. Muaj ntau hom cellulose ethers, suav nrog methylhydroxyethylcellulose (MHEC), ethylhydroxyethylcellulose (EHEC), thiab hydroxyethylcellulose (HEC), thiab lwm yam.
Kev ua tau zoo ntawm cellulose ether mix aggregate masonry mortar
Txhim kho kev ua haujlwm
Ib qho txiaj ntsig tseem ceeb ntawm kev siv cellulose ethers hauv cov khoom sib xyaw ua ke masonry mortars yog txhim kho kev ua haujlwm. Cellulose ethers ua cov roj nplua nyeem, txo kev sib txhuam ntawm cov tshuaj khib thiab lwm yam ntaub ntawv. Qhov no ua rau cov mortar yooj yim rau kev sib kis, txo cov sij hawm tsim kho thiab ua kom cov khoom tsim tau. Tsis tas li ntawd, cellulose ether tuaj yeem ua kom qhov sib xws ntawm cov khoom sib xyaw ua ke, ua rau cov tshuaj khib nyiab smoother thiab zoo ib yam.
nce dej tuav
Cellulose ether yog hydrophilic, uas txhais tau hais tias nws muaj affinity rau dej. Thaum ntxiv rau cov sib tov sib xyaw masonry mortar, nws tuaj yeem ua rau kom cov dej tuav ntawm lub mortar. Qhov no yuav pab kom cov mortar moist mus ntev, uas yog ib qho tseem ceeb rau txoj kev kho. Kev kho kom zoo kom ntseeg tau tias lub mortar ncav cuag nws lub zog siab tshaj plaws, ua rau nws ruaj khov thiab kav ntev.
txo shrinkage
Lwm qhov txiaj ntsig ntawm kev siv cellulose ethers hauv cov khoom sib xyaw ua ke masonry mortars yog txo qis. Shrinkage tshwm sim thaum mortar dries thiab poob noo noo, ua rau nws shrink. Qhov no tuaj yeem ua rau tawg thiab lwm yam tsis xws luag hauv cov qauv tiav. Cellulose ethers pab txo cov dej uas evaporates hauv mortar, yog li txo qhov shrinkage thiab txhim kho tag nrho qhov zoo ntawm qhov project tiav.
txhim khu adhesion
Zoo adhesion ntawm mortar thiab masonry units yog qhov tseem ceeb rau cov qauv muaj zog thiab ruaj khov. Cellulose ethers txhim kho qhov adhesion ntawm mortar los ntawm kev sib txuas nrog cov cement hais. Qhov no txhim kho cov nplaum nplaum ntawm cov mortar, ua rau muaj zog, txhim khu kev qha ntau dua.
nce yooj
Mixed aggregate masonry structures raug cuam tshuam los ntawm lwm yam xws li kev hloov pauv ntawm qhov kub thiab txias, av noo, thiab lwm yam kev mob ib puag ncig. Cov cellulose ether nyob rau hauv cov sib tov sib xyaw masonry mortar pab txhim kho qhov yooj ntawm mortar. Qhov no ua rau nws tsis tshua muaj kev tawg thiab pab tswj cov txheej txheem kev ncaj ncees ntawm qhov project.
nyob rau hauv xaus
Hauv cov ntsiab lus, muaj ntau yam txiaj ntsig rau kev siv cellulose ethers hauv cov khoom sib xyaw ua ke sib xyaw. Nws txhim kho kev ua haujlwm, txhim kho cov dej tuav, txo qis qis, nce adhesion thiab txhim kho qhov yooj yim. Thaum siv kom raug, cellulose ethers tuaj yeem txhim kho tag nrho qhov zoo thiab ua haujlwm ntev ntawm cov khoom sib xyaw ua ke ntawm cov masonry. Nws yog ib puag ncig tus phooj ywg thiab tus nqi-zoo additive uas yuav siv tau nyob rau hauv ib tug ntau yam ntawm kev tsim kho tej yaam num. Yog li ntawd, cov neeg cog lus thiab cov neeg tsim khoom yuav tsum xav txog kev siv cov cellulose ethers nyob rau hauv cov sib xyaw ua ke masonry mortars.
Post lub sij hawm: Aug-25-2023