Raws li kev tsim kho kev lag luam txuas ntxiv nthuav dav thiab txhim kho, muaj kev xav tau ntau ntxiv rau cov khoom siv hauv tsev ua tau zoo thiab ruaj khov, thiab cov khoom siv khib nyiab qhuav tau dhau los ua qhov kev xaiv nrov rau ntau yam kev siv. Hydroxypropylmethylcellulose (HPMC) yog ib qho tseem ceeb additive uas txhim kho qhov zoo, yam ntxwv thiab kev ua tau zoo ntawm cov mortars. Hauv tsab xov xwm no peb tham txog qhov zoo ntawm kev siv HPMC hauv cov tshuaj khib nyiab qhuav.
1. Txhim kho kev ua haujlwm thiab kev sib koom ua ke
Ib qho txiaj ntsig tseem ceeb tshaj plaws ntawm HPMC hauv cov tshuaj khib nyiab qhuav yog nws lub peev xwm los txhim kho kev ua haujlwm thiab kev sib koom ua ke. HPMC ua raws li cov thickener, ua kom cov viscosity ntawm cov mortar, ua kom yooj yim rau kev sib kis thiab siv. Nws kuj tseem txhim kho qhov adhesion thiab cohesion ntawm cov txheej txheem sib txawv ntawm mortar, tiv thaiv kev tawg, shrinkage thiab sib cais. Tsis tas li ntawd, HPMC txo cov dej poob thaum kho, txhim kho qhov sib xws ntawm cov mortar thiab ua kom lub ntsej muag smoother thiab zoo ib yam.
2. Ua kom cov dej khaws cia
Lwm qhov txiaj ntsig tseem ceeb ntawm HPMC hauv cov khib nyiab qhuav yog nws lub peev xwm khaws dej siab. HPMC tuaj yeem nqus tau thiab khaws cov dej ntau, uas ua rau kom qhuav thiab kho cov txheej txheem ntawm mortar. Qhov no tso cai rau lub sij hawm txaus rau lub mortar los daws, daim ntawv cog lus thiab teeb tsa, txo qhov kev pheej hmoo ntawm kev tawg, scaling thiab unevenness. Tsis tas li ntawd, HPMC pab tswj cov dej noo ntawm cov mortar, uas txo qhov muaj feem ntawm huab cua thiab ua rau kom muaj zog thiab ua haujlwm ntev ntawm cov qauv.
3. Txhim kho qhov yooj thiab lub zog
Hauv cov tshuaj khib nyiab qhuav, HPMC tuaj yeem txhim kho qhov yooj yim thiab lub zog ntawm cov tshuaj khib. Raws li ib tug plasticizer, HPMC txhim kho elasticity thiab yooj ntawm lub mortar, ua rau nws ntau resistant rau deformation, kev co thiab cuam tshuam. Qhov no txo qis kev pheej hmoo ntawm cov kab nrib pleb, tawg thiab ua tsis tiav, tshwj xeeb tshaj yog nyob rau hauv cov chaw muaj kev ntxhov siab xws li cov fab, seams thiab npoo. Tsis tas li ntawd, HPMC ntxiv dag zog rau cov mortar los ntawm kev ua kom nws lub zog tensile thiab compressive zog, yog li kev txhim kho lub peev xwm load-bearing thiab stability ntawm cov qauv.
4. Cov tshuaj zoo dua qub thiab huab cua tsis kam
Ntxiv HPMC rau qhuav-siv mortars kuj ua rau lawv cov tshuaj lom neeg thiab huab cua tsis kam. HPMC ua raws li kev thaiv kom txo tau cov permeability ntawm mortar thiab tiv thaiv kev nkag mus ntawm dej, roj thiab cov khoom tsis zoo xws li ntsev, kua qaub thiab alkali. Qhov no tiv thaiv cov qauv ntawm corrosion, leaching thiab degradation, tshwj xeeb tshaj yog nyob rau hauv hnyav thiab huab ib puag ncig. Tsis tas li ntawd, HPMC txhim kho UV tsis kam, thermal stability thiab khov-thaw tsis kam ntawm cov tshuaj khib, yog li txo qhov kev pheej hmoo ntawm fading, discoloration thiab tawg vim qhov kub thiab txias hloov.
5. Kev tiv thaiv kev lag luam thiab ib puag ncig
Lwm qhov zoo dua ntawm HPMC hauv cov tshuaj khib nyiab qhuav yog nws cov nqi-zoo thiab kev phooj ywg ib puag ncig. HPMC yog cov khoom siv txuas ntxiv dua tshiab thiab biodegradable uas tuaj yeem hloov cov khoom siv hluavtaws thiab tsim kev puas tsuaj rau hauv mortar, txo qhov cuam tshuam ib puag ncig ntawm kev tsim kho kev lag luam. Tsis tas li ntawd, HPMC muaj txiaj ntsig zoo thiab tsuas yog xav tau me me ntawm cov khoom ntxiv kom ua tiav cov khoom xav tau thiab cov khoom ntawm cov tshuaj khib nyiab, txo nqi thiab pov tseg hauv cov txheej txheem tsim khoom.
nyob rau hauv xaus
Nyob rau hauv cov ntsiab lus, HPMC yog ib qho tseem ceeb thiab muaj txiaj ntsig additive nyob rau hauv qhuav-sib tov mortars vim nws txhim kho kev ua hauj lwm, cohesion, dej tuav, yooj, lub zog, tshuaj tiv thaiv thiab kev lag luam ntawm mortar. Kev siv HPMC nyob rau hauv qhuav-sib tov mortars pab txhawb kev tsim kho kom zoo thiab ruaj khov, ruaj khov thiab ua kom zoo nkauj. Yog li, nws raug nquahu kom xav txog HPMC ua ib qho tseem ceeb hauv cov tshuaj khib nyiab qhuav thiab xaiv tus neeg muag khoom uas muaj kev ntseeg siab thiab muaj koob npe uas tuaj yeem muab cov khoom lag luam thiab cov kev pabcuam zoo sib xws.
Post lub sij hawm: Aug-09-2023