qhia
Qhuav-sib tov mortar yog ib qho sib xyaw ntawm cov cement, xuab zeb, thiab lwm yam khoom siv ntxiv rau cov vuas luaj, sau qhov khoob, thiab qhov chaw du. Kev sib xyaw ua ke ntawm cov khoom xyaw yog qhov tseem ceeb rau kev ua cov mortars nrog kev sib raug zoo, lub zog thiab kav ntev. Cov neeg tsim khoom yog li siv hydroxypropyl methylcellulose (HPMC) ua cov khoom tseem ceeb hauv cov tshuaj khib nyiab qhuav. HPMC yog cellulose-derived polymer uas yog soluble nyob rau hauv dej thiab dav siv nyob rau hauv kev tsim kho kev lag luam vim nws tshwj xeeb rheological zog.
HPMC qib xeem
Muaj ntau hom HPMC qib nyob rau hauv kev ua lag luam, txhua tus muaj cov khoom tshwj xeeb thiab muaj peev xwm uas cuam tshuam rau kev ua haujlwm ntawm cov khoom kawg. Yog li ntawd, cov chaw tsim khoom qhuav-mix mortar yuav tsum tau kuaj ntau qib HPMC los xaiv qhov uas tsim nyog rau lawv cov khoom tsim.
Cov hauv qab no yog cov yam ntxwv tseem ceeb uas cov tuam txhab tshuaj ntsuam xyuas thaum kuaj HPMC qib hauv cov tshuaj khib nyiab qhuav:
1. Kev tuav dej
Kev tuav dej yog lub peev xwm ntawm HPMC los tuav dej thiab tiv thaiv evaporation thaum lub sijhawm kho. Kev tuav cov dej ntawm koj cov mortar thiab xyuas kom nws kho kom zoo yog qhov tseem ceeb, tshwj xeeb tshaj yog nyob rau hauv huab cua kub, qhuav. Kev tuav dej ntau dua ua rau lub sijhawm kho ntev dua, uas ua rau qis qis dua. Cov neeg tsim khoom yog li ntawd nrhiav kev tawm tsam qhov sib npaug ntawm cov dej tuav thiab kho lub sijhawm thaum xaiv HPMC qib.
2. Thickening zog
Lub peev xwm thickening ntawm HPMC yog ib qho kev ntsuas ntawm nws lub peev xwm los ua kom cov viscosity ntawm mortar. High viscosity mortars muaj kev sib raug zoo thiab kev sib raug zoo, ua rau lawv zoo tagnrho rau kev tsim kho. Txawm li cas los xij, dhau qhov thickening tuaj yeem ua rau cov khoom tawg, uas ua rau sib xyaw thiab sib kis nyuaj. Cov neeg tsim khoom yog li ntawd yuav tsum tau kuaj HPMC qib ntau kom ntseeg tau tias qhov zoo tshaj plaws thickening zog nrog sib npaug viscosity thiab yooj yim ntawm kev siv.
3. Teem lub sijhawm
Lub sijhawm teem sijhawm ntawm cov khoom sib xyaw qhuav yog qhov tseem ceeb cuam tshuam rau kev tsim khoom thiab qhov zoo ntawm cov khoom kawg. Lub sij hawm teem sij hawm ntev ua rau cov khoom lag luam qis dua, cov nqi zog ntau dua, thiab cov neeg siv khoom txaus siab qis dua. Yog li ntawd, cov tuam ntxhab yuav tsum xaiv cov qib HPMC uas yuav muab lub sijhawm teem sijhawm zoo tshaj plaws thaum ua kom ntseeg tau tias cov khoom raug kho kom zoo.
4. Zaj duab xis tsim
Cov cuab yeej ua yeeb yaj kiab yog lub peev xwm ntawm HPMC los tsim cov txheej txheem tiv thaiv ntawm qhov chaw kho cov tshuaj khib nyiab. Cov txheej no muab kev tiv thaiv ntau yam ib puag ncig xws li cua, nag thiab av noo thiab pab kom ntev lub neej ntawm cov khoom kawg. Cov neeg tsim khoom yog li ntawd tsom mus xaiv cov qib HPMC uas muab cov yeeb yaj kiab siab ua kom muaj kev cuam tshuam me me xws li fading, discoloration lossis tev.
5. Compatibility nrog lwm cov nplaum
Dry-mix mortars siv kev sib txuas ntawm cov binders kom ua tiav qhov kev ua tau zoo. Txawm li cas los xij, tsis yog tag nrho cov nplaum nplaum tau sib haum nrog HPMC, uas tuaj yeem ua rau txo qis kev sib koom ua ke, adhesion thiab kev sib raug zoo. Yog li ntawd, cov tuam ntxhab sim HPMC cov qhab nia feem ntau los txiav txim siab lawv cov kev sib raug zoo nrog lwm cov nplaum thiab xaiv qhov uas muab cov txiaj ntsig zoo tshaj plaws.
HPMC yog cov khoom tseem ceeb hauv cov tshuaj khib nyiab qhuav, cuam tshuam rau nws cov kev ua tau zoo thiab kav ntev. Yog li ntawd, cov tuam txhab tsim khoom yuav tsum ntsuas ntau qib HPMC los xaiv ib qho uas muab cov dej tuav zoo tshaj plaws, lub zog hnyav, lub sijhawm teem sijhawm, tsim cov yeeb yaj kiab, thiab sib haum nrog lwm cov nplaum. Kev ntsuam xyuas HPMC cov qhab nia yog ib kauj ruam tseem ceeb hauv kev tsim kom muaj kev ua tau zoo ntawm cov khoom sib xyaw qhuav uas xa cov kev ua tau zoo ntev, cov neeg siv khoom txaus siab thiab muaj txiaj ntsig ntau ntxiv. Nrog rau kev sib xyaw ua ke ntawm HPMC qib thiab cov khoom xyaw, cov khoom sib xyaw qhuav tuaj yeem muab cov txiaj ntsig zoo, ua haujlwm ntev thiab siv tau yooj yim, ua rau lawv zoo tagnrho rau ntau yam kev tsim kho.
Post lub sij hawm: Aug-11-2023