Txhawm rau txhim kho kev ua haujlwm thiab kev ua kom zoo hauv tsev mortars, Hydroxypropyl Methyl Cellulose (HPMC) yog ib qho tseem ceeb ntxiv. HPMC plays ntau lub luag hauj lwm hauv mortar xws li thickening, dej tuav, thiab txhim kho kev sib raug zoo. Los ntawm kev ua kom zoo dua ntawm kev siv HPMC thiab lwm yam kev ntsuas, kev ua haujlwm ntawm cov mortar tuaj yeem txhim kho tau zoo.
1. Kev cuam tshuam ntawm HPMC ntawm kev ua haujlwm ntawm mortar
Kev tuav dej
Ib qho ntawm lub luag haujlwm tseem ceeb ntawm HPMC yog txhawm rau txhim kho cov dej tuav ntawm mortar. Lub mortar yuav tsum tau khaws cia kom noo nyob rau lub sijhawm ntev thaum lub sijhawm tsim kho kom nws tuaj yeem ua haujlwm, kho thiab kis tusyees ntawm lub hauv paus nto rau lub sijhawm ntev. Yog hais tias lub mortar poob dej sai heev, nws yuav ua rau tsis txaus lub zog thaum ntxov, nyuaj rau kev tsim kho, thiab cuam tshuam rau qhov kawg adhesion nyhuv. Cov pab pawg hydrophilic hauv HPMC molecule tuaj yeem txhim kho cov dej tuav lub peev xwm ntawm cov mortar thiab tiv thaiv cov dej los ntawm evaporating sai heev, yog li ncua lub sijhawm ua haujlwm ntawm cov mortar thiab txhim kho kev tsim kho kom yooj yim.
Thickening
Cov nyhuv thickening ntawm HPMC pab txhim kho cov viscosity ntawm cov mortar, ua rau nws tsis tshua muaj sag thaum lub sij hawm tsim kho, ua kom yooj yim rau paving thiab kho ntawm phab ntsa lossis hauv pem teb. Qhov no yog qhov tshwj xeeb tshaj yog rau plastering ntsug nto. Cov khoom rheological ntawm cov mortar raug kho los ntawm HPMC, ua kom yooj yim rau kev khiav lag luam thaum lub sij hawm plastering thiab paving, yog li txhim kho kev tsim kho.
Uniformity thiab cais tsis kam
HPMC tuaj yeem sib cais cov cement, xuab zeb thiab lwm yam khoom siv hauv mortar, txo qhov sib cais ntawm cov ntaub ntawv, thiab txhim kho tag nrho cov khoom sib xws ntawm mortar. Qhov no yuav pab txo cov teeb meem tshwm sim thaum lub sij hawm tsim kho xws li cov kab nrib pleb thiab npuas, ua kom lub ntsej muag du ntawm cov mortar thaum ua kom nws lub zog thiab kav ntev.
2. Qhov cuam tshuam ntawm HPMC ntawm cov tshuaj khib nyiab
Txhim kho adhesion
HPMC plays lub luag haujlwm tseem ceeb hauv kev txhim kho cov adhesion ntawm cov tshuaj khib rau ntawm qhov chaw substrate. Vim nws cov dej tuav tau zoo thiab cov nyhuv thickening, HPMC tuaj yeem txhawb nqa tag nrho cov tshuaj tiv thaiv hydration ntawm cov cement los ua lub cev nruj dua, yog li txhim kho lub zog sib txuas ntawm cov mortar thiab cov txheej txheem. Qhov no yog qhov tseem ceeb heev los xyuas kom meej tias lub mortar tsis poob, tawg, thiab ua kom ruaj khov.
Txhim kho compatibility nrog ntau yam substrates
Hauv kev tsim kho, mortar feem ntau tuaj rau hauv kev sib cuag nrog ntau yam substrates (xws li pob zeb, cib, pob zeb, thiab lwm yam). Cov khoom sib txawv muaj cov khoom sib txawv. Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov mortar thiab qhov chaw ntawm cov substrates sib txawv, kom ntseeg tau tias cov mortar tseem muaj peev xwm ua tau zoo hauv kev tsim kho ib puag ncig. HPMC tuaj yeem tsim cov txheej txheem zoo ib yam rau ntawm qhov chaw ntawm lub substrate los txhim kho qhov adhesion ntawm mortar.
Txhim kho kev tawg tsis kam
Los ntawm kev sib xyaw ua ke ntawm cov dej tuav thiab thickening, HPMC muaj peev xwm txo qis cov kab nrib pleb uas tshwm sim thaum lub sij hawm ziab ntawm cov tshuaj khib nyiab. Cov kab nrib pleb no feem ntau ua rau tsis muaj zog adhesion ntawm mortar, ua rau nws tev lossis tawg thaum siv. Kev siv HPMC tuaj yeem cuam tshuam qhov tshwm sim ntawm cov kab nrib pleb no, yog li ua kom muaj kev sib raug zoo ntev ntawm cov tshuaj khib nyiab.
3. Cov tswv yim los txhim kho kev ua haujlwm thiab kev ua haujlwm ntawm HPMC mortar
Kev xaiv tsim nyog ntawm HPMC ntau yam thiab ntau npaum li cas
Mortars rau kev siv sib txawv muaj cov kev xav tau sib txawv rau HPMC. Feem ntau, tus nqi ntawm HPMC siv nyob rau hauv kev tsim mortars yog li ntawm 0.1% mus rau 0.5%. Los ntawm kev sim kho tus nqi thiab qib viscosity ntawm HPMC, rheology thiab adhesion ntawm mortar tuaj yeem ua kom zoo dua. Tsis tas li ntawd, high-viscosity HPMC tuaj yeem txhim kho cov dej tuav thiab cov nyhuv ntawm cov tshuaj khib nyiab, thaum cov viscosity tsawg HPMC tuaj yeem pab txhim kho cov kua dej ntawm cov mortar. Yog li ntawd, nyob rau hauv cov xwm txheej sib txawv, hom HPMC yuav tsum raug xaiv tsim nyog raws li qhov xav tau tiag tiag.
Synergy nrog lwm yam additives
HPMC feem ntau yog siv nrog rau lwm yam additives, xws li latex hmoov, cellulose ether, thiab lwm yam. Latex hmoov tuaj yeem txhim kho qhov yooj thiab adhesion ntawm mortar, thiab tshwj xeeb tshaj yog tsim rau cov ntawv thov uas xav tau adhesion siab, xws li cov nplais nplaum. Cov khoom siv ntxiv xws li cellulose ethers tuaj yeem ua ke nrog HPMC txhawm rau txhim kho kev sib tsoo thiab dej tuav ntawm cov mortar. Yog li ntawd, los ntawm cov nyhuv synergistic ntawm ntau yam additives, tag nrho cov kev ua tau zoo ntawm mortar tuaj yeem txhim kho tau zoo.
Optimize lub formulation tsim ntawm mortar
Txhawm rau muab kev ua si tag nrho rau lub luag haujlwm ntawm HPMC, kev tsim qauv ntawm cov tshuaj khib kuj tseem ceeb heev. Qhov tsim nyog dej-cement piv, xaiv cov mortar aggregates, thiab qhov feem ntawm cov cement thiab lwm cov ntaub ntawv cementitious yuav cuam tshuam rau kev ua haujlwm ntawm mortar. Los ntawm kev ua kom zoo tag nrho cov mis ntawm mortar kom ntseeg tau tias muaj kev sib cais thiab txaus cov tshuaj tiv thaiv ntawm cov ntaub ntawv, kev txhim kho cov nyhuv ntawm HPMC ntawm cov khoom ntawm mortar tuaj yeem txhim kho ntxiv.
Txhim kho kev tsim kho tshuab
Kev ua haujlwm thiab adhesion ntawm mortar tsis yog tsuas yog cuam tshuam nrog kev tsim qauv, tab sis kuj tseem cuam tshuam nrog kev tsim kho tshuab. Piv txwv li, lub paving thickness thaum lub sij hawm tsim kho, kev kho mob ntawm lub hauv paus nto, lub sij hawm kho ntawm lub mortar, thiab lwm yam yuav tag nrho cov muaj feem xyuam rau qhov kawg adhesion nyhuv. Kev tsim kho tshuab tsim nyog tuaj yeem ua kom paub tseeb tias HPMC ua tau zoo hauv mortar thiab zam qhov tsis zoo los ntawm teeb meem kev tsim kho.
Raws li ib qho tseem ceeb ntxiv nyob rau hauv lub tsev mortar, HPMC tuaj yeem txhim kho kev ua haujlwm thiab kev ua haujlwm ntawm mortar los ntawm nws txoj haujlwm ntawm dej tuav, thickening, thiab kev sib koom ua ke. Los ntawm kev xaiv hom thiab ntau npaum li cas ntawm HPMC, siv nws hauv kev sib koom ua ke nrog lwm cov khoom siv ntxiv, ua kom zoo rau cov tshuaj khib nyiab, thiab txhim kho cov txheej txheem tsim kho, kev ua haujlwm ntawm cov mortar tuaj yeem ua kom tiav thiab qhov zoo thiab ua haujlwm ntawm lub tsev tsim kho tuaj yeem ua kom ntseeg tau.
Post lub sij hawm: Oct-16-2024