HPMC (hydroxypropyl methylcellulose) yog ib qho tshuaj ntxiv uas siv dav hauv kev tsim kho, tshwj xeeb tshaj yog ua lub luag haujlwm tseem ceeb hauv mortar. Nws cov khoom tshwj xeeb muab cov mortar tseem ceeb txhim kho nyob rau hauv adhesion thiab bonding zog.
1. Txhim kho kev ua haujlwm ntawm mortar
HPMC tuaj yeem txhim kho kev tsim kho ntawm mortar thiab ua kom lub sijhawm ua haujlwm ntawm mortar. Qhov no yog qhov tseem ceeb rau kev ua haujlwm ntawm cov chaw tsim kho. Vim tias HPMC muaj cov dej tuav tau zoo, nws tuaj yeem ncua cov evaporation ntawm cov dej hauv mortar nyob rau hauv qhov kub thiab txias ib puag ncig, yog li muab cov neeg ua haujlwm tsim kho ntau lub sijhawm los ua haujlwm. Qhov kev tuav dej zoo no tuaj yeem tiv thaiv cov mortar los ntawm kev ziab ntxov ntxov, kom ntseeg tau tias nws tseem muaj adhesion siab thaum lub sij hawm tsim kho, yog li txhim kho nws cov adhesion thiab kev sib txuas lub zog.
2. Txhim kho cov dej khaws cia ntawm mortar
Thaum lub sij hawm curing txheej txheem ntawm mortar, qeeb evaporation ntawm dej yog ib qho tseem ceeb cuam tshuam rau lub zog sib txuas. HPMC muaj cov khoom tuav dej zoo heev. Nws tuaj yeem kaw cov dej noo hauv mortar thiab txo qhov poob ntawm noo noo sai. Qhov muaj dej txaus tuaj yeem ua kom cov cement tau hydrated tag nrho. Cov tshuaj tiv thaiv hydration ntawm cov cement yog cov txheej txheem tseem ceeb hauv kev tsim cov ntawv cog lus muaj zog. Cov dej tuav dej ntawm HPMC no muaj qhov cuam tshuam tseem ceeb ntawm kev txhim kho lub zog sib txuas ntawm mortar. Tsis tas li ntawd, kev tuav dej kuj tuaj yeem txhim kho qhov adhesion ntawm mortar rau ntawm qhov sib txawv substrate thiab tsis txhob poob los yog tawg teeb meem tshwm sim los ntawm cov dej tsis txaus.
3. Txhim kho lub wettability thiab fluidity ntawm mortar
Kev taw qhia ntawm HPMC tuaj yeem txhim kho qhov ntub dej ntawm cov mortar, uas txhais tau hais tias cov mortar tuaj yeem ntub dej ntawm cov substrate zoo dua, yog li txhim kho adhesion. Hauv kev siv tswv yim, qib ntawm ntub dej ntawm cov khoom siv hauv qab los ntawm cov tshuaj khib ncaj qha cuam tshuam rau nws cov txiaj ntsig kev sib raug zoo. HPMC tuaj yeem txo qhov nro ntawm lub mortar, tso cai rau nws los npog cov khoom siv hauv paus kom sib npaug, yog li txhim kho lub zog sib txuas ntawm cov khoom siv hauv paus thiab cov mortar. Nyob rau tib lub sijhawm, HPMC tuaj yeem kho cov rheology ntawm cov mortar kom cov mortar smoother thaum siv, txo qhov khoob thiab qhov tsis sib xws thaum lub sijhawm tsim kho, yog li txhim kho kev sib raug zoo ntxiv.
4. Txo cov mortar shrinkage thiab tawg
HPMC tuaj yeem tswj tau qhov shrinkage thiab deformation ntawm mortar thaum nws cov txheej txheem hardening. Mortar feem ntau shrinks nyob rau hauv ntim thaum kho. Yog tias qhov shrinkage no tsis tswj, nws yuav ua rau txo qis hauv kev sib txuas ntawm cov tshuaj khib thiab cov substrate, lossis txawm tawg. Cov dej tuav ntawm HPMC pab tswj cov txheej txheem hydration hauv cov tshuaj khib nyiab, ua rau nws ua kom muaj zog ntau dua, yog li txo qis qis thiab tawg teeb meem. Qhov no tsis tsuas yog txhim kho lub sijhawm ntev ntawm cov tshuaj khib nyiab, tab sis kuj tseem txhim kho nws cov khoom siv zog thiab adhesion zog.
5. Txhim kho qhov zawv zawg tsis kam ntawm mortar
Nyob rau ntsug lossis inclined siv qhov chaw, mortar nyiam swb vim nws qhov hnyav, tshwj xeeb tshaj yog thaum lub thickness ntawm kev tsim loj. Qhov xwm txheej no yuav ua rau txo qis ntawm kev sib txuas ntawm lub zog ntawm cov tshuaj khib thiab cov khoom siv hauv paus, cuam tshuam rau qhov kawg tshwm sim. HPMC tuaj yeem txhim kho qhov zawv zawg tsis kam ntawm mortar, tso cai rau nws kom tswj tau qhov adhesion zoo ntawm ntsug lossis inclined nto. Los ntawm kev kho cov viscosity thiab dej tuav ntawm lub mortar, HPMC xyuas kom meej tias lub mortar muaj peev xwm tiv taus lub zog ntawm lub ntiajteb txawj nqus hauv lub xeev ntub dej, yog li txhim kho nws lub zog sib txuas hauv qhov chaw tshwj xeeb.
6. Txhim kho qhov khov-thaw tsis kam ntawm mortar
Hauv qee qhov chaw, cov khoom siv hauv tsev yuav tsum tiv taus qhov txias txias thiab nquag khov-thaw mus. Lub zog ntawm daim ntawv cog lus ntawm cov tshuaj khib nyiab yuav txo qis tom qab muaj ntau lub voj voog khov-thaw. HPMC tuaj yeem txhim kho qhov khov-thaw tiv thaiv los ntawm kev txhim kho cov qauv kev ruaj ntseg thiab dej tuav ntawm mortar. Qhov no txhais tau hais tias lub mortar tseem tuaj yeem tuav tau zoo adhesion thiab kev sib khi lub zog nyob rau hauv qhov kub thiab txias ib puag ncig, ncua kev pab cuam lub neej ntawm lub tsev.
7. Compatibility rau txawv substrates
HPMC reinforced mortar exhibits zoo substrate compatibility. Txawm hais tias nws yog ib txwm ua pob zeb, masonry, los yog niaj hnub rwb thaiv tsev board, gypsum board, thiab lwm yam., HPMC mortar tuaj yeem muab cov adhesion zoo thiab kev sib raug zoo. Qhov kev siv dav dav no muab HPMC mortar muaj zog sib tw kom zoo dua hauv kev tsim kho. Tsis tas li ntawd, rau cov substrates nrog cov npoo du lossis cov dej tsis zoo, HPMC tuaj yeem kho cov khoom rheological thiab cov dej tuav ntawm cov mortar kom ntseeg tau tias nws nruj kev koom ua ke nrog cov substrate.
8. Txo cov nplaum nplaum thiab txo cov nqi
HPMC tuaj yeem txo kev siv lwm cov tshuaj binders los ntawm kev txhim kho cov adhesion thiab kev sib txuas ntawm cov tshuaj khib nyiab. Hauv kev tsim kho ib txwm muaj, txhawm rau txhim kho kev sib koom ua ke ntawm mortar, nws yog ib qho tsim nyog yuav tsum tau ntxiv ntau cov tshuaj nplaum, uas tsis yog tsuas yog nce tus nqi xwb, tab sis kuj yuav ua rau muaj teeb meem ntawm ib puag ncig. Raws li cov khoom siv tau zoo heev, HPMC tuaj yeem txhim kho qhov kev ua tau zoo ntawm mortar ntawm tus nqi qis dua, yog li txo cov nqi khoom siv hauv kev tsim kho thiab ua tus phooj ywg zoo thiab nyab xeeb.
9. Txhim kho qhov kav ntev ntawm mortar
Bond lub zog thiab adhesion yog qhov tseem ceeb cuam tshuam rau kev ua haujlwm ntawm mortar. HPMC tuaj yeem txuas ntxiv lub neej kev pabcuam ntawm mortar los ntawm kev txhim kho cov qauv sab hauv thiab sab nraud ntawm cov tshuaj khib nyiab. Nws tuaj yeem txo cov teeb meem xws li tawg, tev, thiab hmoov ntawm mortar thaum siv, kom ntseeg tau tias nws muaj kev sib raug zoo zoo thaum siv mus ntev. Qhov no muaj qhov cuam tshuam tseem ceeb rau tag nrho cov qauv kev ruaj ntseg ntawm lub tsev.
Qhov zoo ntawm HPMC mortar nyob rau hauv cov nqe lus ntawm adhesion thiab bonding zog qia los ntawm nws zoo heev dej tuav, wettability, zawv zawg kuj thiab muaj peev xwm los kho cov rheological zog ntawm lub mortar. Cov khoom no tsis tsuas yog txhim kho kev tsim kho ntawm mortar, tab sis kuj txhim kho nws txoj kev sib koom tes nrog ntau yam substrates, ua HPMC mortar dav siv hauv kev tsim kho niaj hnub. Tsis tas li ntawd, qhov sib ntxiv ntawm HPMC kuj tuaj yeem txhim kho qhov khov-thaw tsis kam thiab ua haujlwm ntev ntawm mortar, ntxiv rau kev ruaj ntseg ntev ntawm cov khoom siv hauv tsev. Yog li ntawd, kev siv dav dav ntawm HPMC hauv kev tsim kho kev lag luam tsis tsuas yog txhim kho kev tsim kho kom zoo, tab sis kuj tseem muab txoj hauv kev zoo los txo cov nqi thiab xyuas kom muaj kev tsim kho ib puag ncig.
Post lub sij hawm: Oct-16-2024