Raws li kev lag luam kev tsim kho txuas ntxiv nthuav dav thiab txhim kho, muaj kev xav tau ntau ntxiv rau cov khoom siv ua vaj tse uas ua tau zoo thiab ruaj khov, thiab cov hmoov sib xyaw qhuav tau dhau los ua qhov kev xaiv nrov rau ntau yam kev siv. Hydroxypropylmethylcellulose (HPMC) yog ib qho khoom siv tseem ceeb uas txhim kho qhov zoo, cov yam ntxwv thiab kev ua tau zoo ntawm cov hmoov no. Hauv tsab xov xwm no peb tham txog qhov zoo ntawm kev siv HPMC hauv cov hmoov sib xyaw qhuav.
1. Txhim kho kev ua haujlwm thiab kev sib koom ua ke
Ib qho ntawm cov txiaj ntsig tseem ceeb tshaj plaws ntawm HPMC hauv cov mortars qhuav yog nws lub peev xwm los txhim kho kev ua haujlwm thiab kev sib koom ua ke. HPMC ua haujlwm ua tus thickener, ua rau cov mortar viscosity nce ntxiv, ua rau nws yooj yim rau kev nthuav dav thiab siv. Nws kuj tseem ua rau kev sib txuas thiab kev sib koom ua ke ntawm cov txheej sib txawv ntawm mortar, tiv thaiv kev tawg, shrinkage thiab kev sib cais. Tsis tas li ntawd, HPMC txo cov dej poob thaum lub sijhawm kho, txhim kho qhov sib xws ntawm cov mortar thiab ua rau qhov chaw du thiab sib xws dua.
2. Ua kom cov dej khaws cia ntau ntxiv
Lwm qhov zoo ntawm HPMC hauv cov mortars qhuav yog nws lub peev xwm khaws dej tau zoo. HPMC tuaj yeem nqus thiab khaws dej ntau, uas ua rau qeeb qeeb rau cov txheej txheem ziab thiab kho ntawm cov mortar. Qhov no tso cai rau lub sijhawm txaus rau cov mortar kom khov, sib txuas thiab teeb tsa, txo qhov kev pheej hmoo ntawm kev tawg, kev tawg thiab tsis sib xws. Tsis tas li ntawd, HPMC pab tswj qhov sib npaug ntawm cov dej noo ntawm cov mortar, uas txo qhov muaj feem ntawm huab cua thiab ua rau lub zog thiab lub neej ntev ntawm cov qauv.
3. Txhim kho qhov yooj ywm thiab lub zog
Hauv cov mortar qhuav sib xyaw, HPMC kuj tseem tuaj yeem txhim kho qhov yooj ywm thiab lub zog ntawm cov mortar. Ua ib qho plasticizer, HPMC txhim kho qhov elasticity thiab kev ywj pheej ntawm cov mortar, ua rau nws tiv taus kev hloov pauv, kev co thiab kev cuam tshuam. Qhov no txo qhov kev pheej hmoo ntawm kev tawg, tawg thiab kev ua tsis tiav, tshwj xeeb tshaj yog nyob rau hauv thaj chaw muaj kev ntxhov siab xws li cov ces kaum, cov seams thiab ntug. Tsis tas li ntawd, HPMC txhawb nqa cov mortar los ntawm kev nce nws lub zog tensile thiab compressive, yog li txhim kho lub peev xwm thauj khoom thiab kev ruaj khov ntawm cov qauv.
4. Tshuaj lom neeg thiab huab cua zoo dua
Ntxiv HPMC rau cov mortars qhuav kuj ua rau lawv cov tshuaj lom neeg thiab huab cua tsis kam. HPMC ua haujlwm ua ib qho kev thaiv kom txo qhov permeability ntawm mortar thiab tiv thaiv kev nkag mus ntawm dej, roj thiab cov tshuaj lom neeg xws li ntsev, kua qaub thiab alkali. Qhov no tiv thaiv cov qauv los ntawm kev xeb, leaching thiab kev puas tsuaj, tshwj xeeb tshaj yog nyob rau hauv qhov chaw nyuaj thiab hnyav. Tsis tas li ntawd, HPMC txhim kho qhov UV tsis kam, thermal stability thiab khov-thaw tsis kam ntawm mortar, yog li txo qhov kev pheej hmoo ntawm fading, discoloration thiab tawg vim qhov kub hloov pauv.
5. Kev tiv thaiv kev lag luam thiab ib puag ncig
Lwm qhov zoo ntawm HPMC hauv cov mortar qhuav yog nws cov nqi tsim nyog thiab kev phooj ywg ib puag ncig. HPMC yog cov khoom siv rov ua dua tshiab thiab biodegradable uas tuaj yeem hloov cov khoom siv hluavtaws thiab cov khoom siv tsis zoo hauv mortar, txo qhov cuam tshuam rau ib puag ncig ntawm kev lag luam kev tsim kho. Tsis tas li ntawd, HPMC muaj txiaj ntsig zoo thiab tsuas yog xav tau me ntsis ntawm cov khoom ntxiv kom ua tiav cov khoom xav tau thiab cov khoom ntawm mortar, txo cov nqi thiab pov tseg hauv cov txheej txheem ntau lawm.
xaus lus
Hauv kev xaus, HPMC yog ib qho tseem ceeb thiab muaj txiaj ntsig ntxiv rau hauv cov mortars qhuav vim nws txhim kho kev ua haujlwm tau zoo, kev sib koom ua ke, kev khaws dej, kev ywj pheej, lub zog, kev tiv thaiv tshuaj lom neeg thiab kev txuag nyiaj ntawm cov mortar. Kev siv HPMC hauv cov mortars qhuav pab txhawb rau kev tsim kho zoo thiab ruaj khov uas ruaj khov, muaj kev nyab xeeb thiab zoo nkauj. Yog li ntawd, nws raug pom zoo kom xav txog HPMC ua ib qho khoom xyaw tseem ceeb hauv cov qauv mortar qhuav thiab xaiv tus neeg muag khoom ntseeg siab thiab muaj koob npe nrov uas tuaj yeem muab cov khoom lag luam thiab cov kev pabcuam zoo sib xws thiab txhim khu kev qha.
Lub sijhawm tshaj tawm: Lub Yim Hli-09-2023