Hydroxypropylmethylcellulose (HPMC) yog cov khoom siv hluavtaws uas siv dav hauv kev tsim kho kev lag luam, tshwj xeeb tshaj yog nyob rau hauv kev tsim cov mortar thiab pob zeb. HPMC ua raws li cov thickener thiab dej tuav tus neeg saib xyuas, txhim kho cov khoom siv thiab ua haujlwm ntawm cov khoom siv cement. HPMC yog cov khoom muaj ntau yam uas tuaj yeem siv rau hauv cov khoom siv cementitious xws li cov vuas, plasters thiab cov plag tsev. Hauv tsab xov xwm no, peb tshawb fawb txog cov txiaj ntsig ntawm kev siv HPMC hauv mortar thiab pob zeb siv.
Txhim kho kev ua haujlwm
Qhov sib ntxiv ntawm HPMC rau mortar thiab pob zeb txhim kho cov yas, cohesion thiab dej tuav ntawm cementitious sib tov. HPMC swells nyob rau hauv dej thiab tsim ib tug gel zoo li huab hwm coj, uas txo cov dej poob nyob rau hauv lub mix, cia cov cement nyob twj ywm ua hauj lwm ntev. Kev txhim kho kev ua haujlwm ntawm kev sib tov ua rau nws yooj yim dua rau cov neeg ua haujlwm siv cov cement sib tov kom zoo dua qub, zoo ib yam.
txhim khu adhesion
Qhov sib ntxiv ntawm HPMC kuj tau txhim kho qhov adhesion ntawm cov cement sib tov rau cov substrate. HPMC ua raws li cov nplaum nplaum ntawm cov substrate thiab cov cementitious sib tov, ua kom muaj kev ruaj khov thiab ntev ntev. Kev txhim kho adhesion ntawm cov cement sib tov kuj txo qhov kev pheej hmoo ntawm kev tawg lossis tawg ntawm cov mortar lossis pob zeb txheej.
txo shrinkage
Shrinkage yog ib qho tshwm sim uas tshwm sim thaum dej evaporates los ntawm cov cement sib tov ua rau nws ntsws. Qhov no tuaj yeem ua rau cov kab nrib pleb thiab qhov khoob hauv cov cement txheej, txo cov txheej txheem kev ncaj ncees ntawm lub tsev. Ntxiv HPMC rau cov cement sib tov txo cov shrinkage ntawm kev sib tov los ntawm kev khaws cov dej noo thiab txo tus nqi ntawm evaporation. Qhov no ua kom ntseeg tau tias cov cement sib tov tseem ruaj khov thiab tsis ntsws, ua rau lub tsev muaj zog thiab ruaj khov.
Nce durability
Kev siv HPMC hauv cov cementitious sib tov tuaj yeem txhim kho qhov ruaj khov ntawm cov khoom tiav. HPMC tsim ib lub network thib ob hauv cov cement matrix, txhim khu lub zog thiab ruaj khov ntawm cov pob zeb. Cov gel zoo li cov khoom tsim los ntawm HPMC kuj tseem ua cov txheej txheem tiv thaiv, tiv thaiv kev nkag mus ntawm dej thiab lwm yam khoom tsis zoo uas tuaj yeem ua rau cov pob zeb puas tsuaj.
Txhim kho dej tsis kam
Kev tiv thaiv dej yog qhov tseem ceeb rau cov txheej txheem cement-based, tshwj xeeb tshaj yog qhov lawv raug dej los yog noo noo. HPMC txhim kho cov dej tsis kam ntawm cov cementitious sib tov los ntawm kev tsim cov dej tsis sib haum uas tiv thaiv dej los ntawm kev nkag mus rau cov cementitious matrix. Qhov no txo qhov muaj feem ntawm cov dej puas xws li cov kab nrib pleb, spalling thiab corrosion, kom ntseeg tau ib tug ntev-ntev, ntau ruaj qauv.
nce yooj
Kev siv HPMC kuj ua rau kom yooj yim ntawm cov cement sib tov. HPMC txo cov rigidity ntawm cov compound, tso cai rau nws khoov thiab nthuav tsis tawg los yog tawg. Qhov no ua rau cov qauv pob zeb tiv taus ntau dua rau kev poob siab thiab kev co, txo qhov muaj peev xwm ntawm kev puas tsuaj los ntawm sab nraud quab yuam.
Txhim kho kev cuam tshuam ib puag ncig
Kev siv HPMC hauv cov cement sib tov kuj muaj qhov cuam tshuam zoo rau ib puag ncig. HPMC yog cov khoom tsis muaj tshuaj lom, biodegradable thiab ib puag ncig tus phooj ywg uas tsis ua rau muaj kev phom sij rau kev noj qab haus huv lossis ib puag ncig. Kev siv HPMC hauv kev siv cov cement-based tuaj yeem txo cov dej uas xav tau rau kev sib tov, txo cov dej siv thiab txo kev cuam tshuam ib puag ncig.
nyob rau hauv xaus
Qhov sib ntxiv ntawm hydroxypropylmethylcellulose (HPMC) rau mortar thiab pob zeb sib tov muaj ntau cov txiaj ntsig los ntawm kev txhim kho cov khoom siv thiab kev ua haujlwm ntawm cov khoom sib tov. HPMC txhim kho kev ua haujlwm ntawm cov cement sib tov los ntawm kev txhim kho plasticity, cohesion thiab dej tuav, ua rau smoother, ntau qhov chaw. HPMC kuj tseem txhim kho adhesion, txo qis shrinkage, txhim khu kev ruaj ntseg, dej tsis kam thiab yooj, thaum txo cov kev cuam tshuam ib puag ncig ntawm cov txheej txheem. Yog li ntawd, kev siv HPMC hauv kev tsim kho kev lag luam yog ib kauj ruam tseem ceeb rau kev ua kom zoo dua qub, ruaj khov thiab kav ntev ntev ntawm cov cement-raws li cov qauv uas tuaj yeem tiv taus ntau yam kev mob.
Post lub sij hawm: Aug-25-2023