Mechanism ntawm Cellulose Ethers hauv Cement Mortar

Cov txheej txheem ntawm cellulose ethers nyob rau hauv cov cement mortar muaj ntau yam kev sib cuam tshuam thiab cov txheej txheem uas pab txhawb rau tag nrho cov kev ua tau zoo thiab cov khoom ntawm cov mortar. Ntawm no yog lub ntsiab lus ntawm cov mechanisms koom nrog:

1. Kev tuav dej: Cellulose ethers muaj cov pab pawg hydrophilic uas yooj yim nqus thiab khaws cov dej hauv cov tshuaj khib nyiab. Qhov kev tuav dej ntev ntev no pab ua kom cov mortar ua haujlwm tau ntev, tiv thaiv kom qhuav ntxov ntxov thiab ua kom cov dej tsis sib xws ntawm cov cement.
2. Kev Tswj Dej: Cellulose ethers tuaj yeem ncua lub hydration ntawm cov cement hais los ntawm kev tsim cov yeeb yaj kiab tiv thaiv ib puag ncig lawv. Qhov kev ncua sij hawm hydration txuas ntxiv lub sijhawm qhib ntawm lub mortar, tso cai rau lub sijhawm txaus rau daim ntawv thov, hloov kho, thiab ua tiav.
3. Txhim kho Dispersion: Cellulose ethers ua raws li dispersants, txhawb kev sib cais ntawm cov cement hais nyob rau hauv mortar mix. Qhov no txhim kho tag nrho homogeneity thiab sib xws ntawm mortar, uas ua rau muaj kev ua haujlwm zoo dua thiab ua haujlwm zoo.
4. Enhanced Adhesion: Cellulose ethers txhim kho qhov adhesion ntawm cov cement mortar rau substrate nto los ntawm kev tsim ib co cohesive bond ntawm mortar hais thiab substrate. Qhov no pab tiv thaiv kev ua tsis tiav ntawm daim ntawv cog lus thiab ua kom muaj kev ruaj ntseg adhesion, txawm tias nyob rau hauv cov xwm txheej nyuaj.
5. Thickening thiab Binding: Cellulose ethers ua cov thickeners thiab binders hauv cement mortar, ua rau nws viscosity thiab cohesion. Qhov no ua rau muaj kev ua haujlwm zoo dua thiab txo qhov kev pheej hmoo ntawm sagging los yog slumping thaum lub sij hawm thov, tshwj xeeb tshaj yog nyob rau hauv ntsug thiab overhead installations.
6. Kev Tiv Thaiv Kev Txhaum Cai: Los ntawm kev txhim kho cov cohesiveness thiab saj zawg zog ntawm cov mortar, cellulose ethers pab faib cov kev ntxhov siab ntau tusyees thoob plaws hauv matrix, txo qhov yuav ua rau shrinkage tawg thiab defects. Qhov no txhim khu lub zuag qhia tag nrho durability thiab kev ua tau zoo ntawm lub mortar.
7. Huab cua nkag: Cellulose ethers tuaj yeem pab tswj huab cua nkag hauv cov cement mortar, ua rau kev txhim kho khov-thaw tsis kam, txo dej nqus, thiab txhim khu kev ruaj ntseg. Cov npuas cua nkag los ua ib qho tsis tiv thaiv kev hloov pauv hauv lub siab, txo qhov kev pheej hmoo ntawm kev puas tsuaj vim yog lub voj voog khov-thaw.
8. Compatibility nrog Additives: Cellulose ethers yog sib xws nrog ntau yam additives feem ntau siv nyob rau hauv cement mortar formulations, xws li ntxhia muab tub lim, plasticizers, thiab air-entraining agents. Lawv tuaj yeem yooj yim muab tso rau hauv cov khoom sib tov kom ua tiav cov kev ua haujlwm tshwj xeeb yam tsis muaj kev cuam tshuam rau lwm yam khoom.

Cov txheej txheem ntawm cellulose ethers nyob rau hauv cov cement mortar muaj kev sib xyaw ua ke ntawm dej tuav, tswj dej, txhim kho kev tawg, txhim kho adhesion, thickening thiab khi, tiv thaiv tawg, huab cua nkag, thiab compatibility nrog additives. Cov txheej txheem no ua haujlwm sib koom ua ke los txhim kho kev ua haujlwm, kev ua haujlwm, thiab ua haujlwm ntev ntawm cov cement mortar hauv ntau daim ntawv thov kev tsim kho.