Qhov kev tshuaj xyuas dav dav no tshuaj xyuas ntau lub luag haujlwm ntawm hydroxypropyl methylcellulose (HPMC) hauv kev txhim kho cov khoom sib txuas thiab plastering mortars.HPMC yog ib qho cellulose derivative uas tau txais kev saib xyuas thoob plaws hauv kev tsim kho kev lag luam vim nws cov khoom tshwj xeeb xws li dej tuav, thickening, thiab txhim kho kev ua haujlwm.
qhia:
1.1 Keeb kwm:
Kev tsim kho kev lag luam txuas ntxiv mus nrhiav cov kev daws teeb meem tshiab los txhim kho kev ua haujlwm ntawm cov khoom siv hauv tsev.HPMC, muab los ntawm cellulose, tau tshwm sim los ua ib qho kev cog lus ntxiv los txhim kho cov khoom ntawm kev sib txuas thiab plastering mortars.Tshooj lus no qhia txog cov ntsiab lus ntawm cov kev cov nyom uas tau ntsib los ntawm cov pa mortars thiab nthuav qhia lub peev xwm ntawm HPMC los daws cov teeb meem no.
1.2 Lub Hom Phiaj:
Lub hom phiaj tseem ceeb ntawm qhov kev tshuaj xyuas no yog txhawm rau txheeb xyuas cov khoom siv tshuaj lom neeg ntawm HPMC, kawm txog nws cov kev cuam tshuam nrog cov tshuaj khib nyiab, thiab ntsuas nws cov txiaj ntsig ntawm ntau yam khoom ntawm kev sib txuas thiab plastering mortars.Txoj kev tshawb no tseem tsom mus tshawb nrhiav cov kev siv tau zoo thiab cov teeb meem ntawm kev sib koom ua ke HPMC hauv cov tshuaj mortar.
Tshuaj muaj pes tsawg leeg thiab cov khoom ntawm HPMC:
2.1 Molecular qauv:
Tshooj lus no tshawb txog cov qauv molecular ntawm HPMC, tsom mus rau cov pab pawg tseem ceeb uas txiav txim siab nws cov khoom tshwj xeeb.Kev nkag siab txog cov tshuaj muaj pes tsawg leeg yog qhov tseem ceeb rau kev kwv yees seb HPMC yuav cuam tshuam li cas nrog cov tshuaj khib nyiab.
2.2 Rheological zog:
HPMC muaj cov khoom tseem ceeb rheological, uas cuam tshuam rau kev ua haujlwm thiab sib xws ntawm mortar.Kev txheeb xyuas qhov tob ntawm cov khoom no tuaj yeem muab kev nkag siab rau lub luag haujlwm ntawm HPMC hauv cov tshuaj mortar.
Kev sib cuam tshuam ntawm HPMC nrog cov khoom khib nyiab:
3.1 Cov khoom siv cementitious:
Kev sib cuam tshuam ntawm HPMC thiab cov khoom siv cementitious yog qhov tseem ceeb hauv kev txiav txim siab lub zog thiab kev sib koom ua ke ntawm mortar.Tshooj lus no delves rau hauv cov txheej txheem tom qab qhov kev cuam tshuam no thiab nws qhov cuam tshuam rau tag nrho kev ua haujlwm ntawm cov tshuaj khib.
3.2 Aggregates thiab fillers:
HPMC kuj cuam tshuam nrog kev sib sau ua ke thiab cov khoom ntim, cuam tshuam rau cov khoom siv ntawm cov tshuaj khib nyiab.Qhov kev tshuaj xyuas no tshuaj xyuas cov txiaj ntsig ntawm HPMC ntawm kev faib tawm ntawm cov khoom no thiab nws qhov kev pab cuam rau lub zog mortar.
Qhov cuam tshuam rau kev ua haujlwm mortar:
4.1 Adhesion thiab cohesion:
Qhov adhesion thiab cohesion ntawm kev sib txuas thiab plastering mortars yog qhov tseem ceeb rau kev tsim kho kom ntev thiab txhim khu kev qha.Tshooj lus no ntsuas qhov cuam tshuam ntawm HPMC ntawm cov khoom no thiab sib tham txog cov txheej txheem uas pab txhawb kev txhim kho adhesion.
4.2 Constructability:
Kev ua haujlwm yog qhov tseem ceeb hauv kev siv tshuaj khib nyiab.Cov txiaj ntsig ntawm HPMC ntawm kev ua haujlwm ntawm mortars yog tshawb nrhiav, suav nrog nws qhov cuam tshuam rau kev yooj yim ntawm daim ntawv thov thiab ua tiav.
4.3 Mechanical zog:
Lub luag hauj lwm ntawm HPMC hauv kev txhim kho cov neeg kho tshuab lub zog ntawm mortar tau tshawb xyuas txog nws cov nyhuv ntawm compressive, tensile thiab flexural zog.Kev tshuaj xyuas kuj tseem tham txog qhov kev noj zaub mov zoo ntawm HPMC kom ua tiav qhov kev xav tau siv.
Durability thiab Resistance:
5.1 Durability:
Lub durability ntawm mortar yog ib qho tseem ceeb los tiv thaiv ib puag ncig yam tseem ceeb thiab ua kom muaj kev ncaj ncees nyob rau lub sijhawm ntev.Tshooj lus no soj ntsuam seb HPMC tuaj yeem txhim kho lub zog ntawm kev sib txuas thiab plastering mortars li cas.
5.2 Resistance rau lwm yam:
HPMC tau sib tham los txhim kho lub mortar lub peev xwm los tiv thaiv tej yam xws li dej nkag mus, raug tshuaj lom neeg, thiab kub hloov.Qhov kev tshuaj xyuas no tshawb xyuas cov txheej txheem uas HPMC yog tus neeg sawv cev tiv thaiv zoo.
Daim Ntawv Qhia Txog Kev Siv thiab Kev Tsim Qauv:
6.1 Kev siv tswv yim:
Cov kev siv tswv yim ntawm HPMC hauv kev sib txuas thiab plastering mortars yog tshawb nrhiav, qhia txog cov ntaub ntawv kawm tiav thiab ua kom pom qhov ua tau ntawm kev koom nrog HPMC hauv kev tsim kho.
6.2 Kev txhim kho cov txheej txheem:
Cov lus qhia rau kev tsim cov mortars nrog HPMC yog muab, coj mus rau hauv tus account yam xws li ntau npaum li cas, compatibility nrog lwm yam additives, thiab manufacturing txheej txheem.Cov lus pom zoo rau kev ua tiav cov txiaj ntsig zoo tau tham txog.
Cov kev sib tw thiab kev cia siab yav tom ntej:
7.1 Cov kev sib tw:
Tshooj lus no tham txog cov teeb meem cuam tshuam nrog kev siv HPMC hauv mortars, suav nrog cov kev tsis zoo thiab kev txwv.Cov tswv yim los daws cov teeb meem no tham txog cov teeb meem.
7.2 Yav Tom Ntej Outlook:
Kev tshuaj xyuas xaus los ntawm kev tshawb nrhiav cov peev txheej yav tom ntej hauv kev siv HPMC hauv kev sib txuas thiab plastering mortars.Cov cheeb tsam rau kev tshawb fawb ntxiv thiab kev tsim kho tshiab raug txheeb xyuas los txhawb kev nce qib ntawm cov khoom siv tsim kho.
Post lub sij hawm: Jan-11-2024