Hydroxypropyl methylcellulose (HPMC) yog ntau yam polymer siv dav hauv cov khoom siv, tshwj xeeb hauv tshuab-blasted mortar. Nws cov khoom tshwj xeeb txhim kho kev ua haujlwm thiab kev ua haujlwm ntawm mortars, ua rau nws muaj txiaj ntsig hauv ntau yam kev siv.
Chemical Properties thiab Functional Benefits of HPMC
HPMC yog ib qho uas tsis yog-ionic cellulose ether muab los ntawm ntuj cellulose los ntawm ntau cov tshuaj tiv thaiv. Nws nthuav tawm ntau yam khoom muaj txiaj ntsig, suav nrog:
Kev tuav dej: HPMC tuaj yeem khaws cov dej kom zoo, uas yog qhov tseem ceeb hauv mortars los tiv thaiv kom qhuav ntxov ntxov thiab ua kom muaj dej txaus ntawm cov khoom cementitious.
Rheology Hloov Kho: Nws ua raws li tus neeg sawv cev thickening, txhim kho cov viscosity thiab sib xws ntawm cov tshuaj khib sib tov.
Adhesion: HPMC txhim kho cov khoom nplaum ntawm cov tshuaj khib nyiab, pab hauv daim ntawv thov ntawm ntsug thiab saum taub hau.
Kev ua haujlwm tau zoo: Cov polymer txhim kho qhov yooj yim ntawm daim ntawv thov thiab sib kis ntawm mortar.
Sag Resistance: Nws muab sag kuj zoo heev, tiv thaiv lub mortar los ntawm slumping los yog sagging thaum lub sij hawm thov.
Huab cua nkag: HPMC tuaj yeem nkag tau cua hauv cov tshuaj khib nyiab, txhim kho nws cov Frost tsis kam thiab txo qhov ntom ntom.
Kev siv hauv tshuab-Blasted mortar
Tshuab-blasted mortar, siv dav rau kev ua thiab plastering loj qhov chaw, muaj txiaj ntsig zoo los ntawm kev suav nrog HPMC. Nov yog cov ntawv thov tseem ceeb:
1. Txau Plaster thiab Render
HPMC txhim khu kev ua tau zoo ntawm cov plasterable plasters thiab renders, uas yog siv los siv cov tshuab txau kom muaj txiaj ntsig zoo ntawm thaj chaw loj. Nws lub luag haujlwm tseem ceeb suav nrog:
Txhim kho Pumpability: HPMC ua kom cov mortar tuaj yeem nqus tau los ntawm lub tshuab tshuaj tsuag yam tsis muaj clogging lossis hnav ntau dhau ntawm cov khoom siv.
Daim ntawv thov Uniform: Nws pab ua kom tiav lub tsho loj, qhov tseem ceeb rau kev zoo nkauj tiav thiab kev tiv thaiv zoo ib yam.
Txo Rebound Loss: Los ntawm kev txhim kho adhesion thiab txo cov rebound, HPMC xyuas kom meej cov khoom nyob rau ntawm phab ntsa, txo cov khib nyiab.
2. Tus kheej-Leveling Compounds
Nyob rau hauv tus kheej-leveling mortars, uas yog tsim los ntws thiab nyob rau hauv lub tiaj tus, du nto yam tsis xav tau troweling, HPMC plays lub luag hauj lwm tseem ceeb los ntawm:
Txhim kho Fluidity: Nws hloov kho cov rheology, xyuas kom cov mortar ntws kom zoo thiab ua rau qhov khoob thiab kev nyuaj siab.
Tswj Lub Sijhawm Teeb Meem: HPMC pab tswj lub sijhawm teem sijhawm, muab sijhawm ua haujlwm txaus thaum ua kom lub sijhawm tawv tawv.
Tiv thaiv kev sib cais: Nws xyuas kom meej tias cov khoom ntawm cov khoom sib xyaw ua ke nyob sib npaug, tiv thaiv kev sib cais sib cais.
3. Adhesive mortars
HPMC yog siv nyob rau hauv nplaum mortars rau cov vuas thiab rwb thaiv tsev boards, muab:
Txhim kho Adhesion: Nws ua kom muaj zog ntawm daim ntawv cog lus ntawm cov tshuaj khib thiab cov substrate lossis pobzeb.
Slump Resistance: Xyuas kom cov vuas nyob rau hauv qhov chaw tsis txhob ntog thaum lub sij hawm kho.
Kev Ua Haujlwm thiab Lub Sijhawm Qhib: Txuas lub sijhawm qhib (lub sijhawm uas cov vuas tuaj yeem hloov kho tom qab thov), ua rau cov txheej txheem thov kev zam txim ntau dua thiab hloov tau.
4. Thermal rwb thaiv tsev mortars
Rau mortars siv nyob rau hauv thermal rwb thaiv tsev systems, HPMC pab txhawb los ntawm:
Daim Ntawv Thov Kev Pab: Ua kom yooj yim rau kev siv cov rwb thaiv tsev los yog cov txheej txheem sib npaug.
Txhim kho Cohesion: Ua kom ntseeg tau tias cov khoom siv insulating adheres zoo rau qhov chaw thiab muab ib txheej insulating zoo ib yam.
Dej Retention: Txhim kho kev kho thiab txo qhov kev pheej hmoo ntawm cov kab nrib pleb vim dej poob sai.
5. Kho mortars
Hauv mortars siv los kho cov vaj tse pob zeb, HPMC pab los ntawm:
Txhim kho kev ua haujlwm: Ua kom cov mortar kho tuaj yeem siv tau yooj yim thiab raug, sau cov kab nrib pleb thiab voids zoo.
Enhanced Adhesion: Muab kev sib txuas ruaj khov rau cov pob zeb uas twb muaj lawm, uas yog qhov tseem ceeb rau kev kho kom ruaj khov.
Shrinkage txo: Txo qis qis thaum kho, yog li txo qhov kev pheej hmoo ntawm kev tawg.
Kev xav txog tswv yim
Thaum siv HPMC hauv tshuab-blasted mortar, qee qhov kev xav tau yuav tsum tau khaws cia hauv siab:
Dosage: Tus nqi tsim nyog ntawm HPMC yuav tsum tau siv los ua kom tiav cov khoom xav tau yam tsis muaj kev cuam tshuam lub zog thiab kev ncaj ncees ntawm cov mortar.
Compatibility: Nws yog ib qho tseem ceeb los xyuas kom meej tias HPMC yog sib xws nrog lwm yam additives thiab cov khoom nyob rau hauv lub mortar mix.
Kev Sib xyaw: Cov txheej txheem sib xyaw kom raug yuav tsum tau ua raws li kom ua kom HPMC tag nrho thiab faib nws mus rau hauv ib qho kev sib tov.
HPMC lub luag hauj lwm nyob rau hauv tshuab-blasted mortar yog multifaceted, txhim khu kev ua tau zoo thiab daim ntawv thov cov khoom ntawm ntau hom mortars. Txawm hais tias yuav ua kom tiav, plastering, self-leveling, lossis kho, HPMC xyuas kom meej tias cov mortar tuaj yeem siv tau zoo thiab ua tau zoo, muab cov txiaj ntsig ntev thiab zoo. Nws lub peev xwm los txhim kho cov dej tuav, kev ua haujlwm, kev nplaum, thiab rheology ua rau nws yog ib qho tseem ceeb ntxiv rau hauv kev tsim kho niaj hnub no, kom ntseeg tau tias cov ntawv thov loj tuaj yeem ua tiav sai thiab rau tus qauv siab. Raws li kev tsim kho thev naus laus zis hloov zuj zus, kev siv HPMC zoo li yuav nthuav dav ntxiv, tau tsav los ntawm kev tshawb fawb thiab kev txhim kho txuas ntxiv mus rau nws lub peev xwm thiab cov txiaj ntsig.
Post lub sij hawm: Jun-07-2024