Hydroxypropyl Methylcellulose (HPMC) yog ib tug natural polymer compound lug siv nyob rau hauv kev tsim kho, tshuaj, zaub mov thiab lwm yam teb. Hauv kev lag luam cement, AnxinCel®HPMC feem ntau yog siv los ua cov khoom siv ntxiv los txhim kho kev ua haujlwm ntawm cov cement, thiab txhim kho cov txheej txheem, kev ua haujlwm thiab qhov kawg hardness ntawm cov cement sib tov.
1. Cov yam ntxwv tseem ceeb thiab cov txheej txheem ntawm kev ua ntawm HPMC
HPMC yog ib yam tshuaj uas tau los ntawm kev hloov cellulose los ntawm ethylation, hydroxypropylation thiab methylation. Nws cov qauv molecular suav nrog ntau pawg hydrophilic thiab hydrophobic, uas ua rau nws ua si ntau lub luag haujlwm hauv cement systems. HPMC ua lub luag haujlwm hauv qab no hauv cement:
Thickening nyhuv
HPMC muaj cov nyhuv thickening thiab tuaj yeem txhim kho cov viscosity ntawm cov cement paste, ua rau cov cement sib tov zoo dua thaum sib tov thiab tsis txhob stratification lossis sedimentation. Qhov no yog qhov tseem ceeb rau kev txhim kho cov dej ntws thiab kev ruaj ntseg ntawm cov cement paste, tshwj xeeb tshaj yog hauv cov pob zeb ua haujlwm siab lossis lwm cov ntaub ntawv xav tau cementitious, kom ntseeg tau tias nws ntim cov pwm zoo dua thiab muaj qhov ntom ntom dua.
Txhim kho kev tuav dej
HPMC tuaj yeem tswj tau cov dej evaporation ntawm cov cement paste thiab ncua sij hawm pib ntawm cov cement. Tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias ib puag ncig, nws muaj peev xwm tuav lub wettability ntawm cement paste thiab tiv thaiv kom qhuav ntxov ntxov, yog li txhim kho kev tsim kho kev ua tau zoo. Kev tuav dej yog ib qho cuab yeej tseem ceeb hauv kev tsim cov khoom siv cement thiab tuaj yeem tiv thaiv kev tsim cov kab nrib pleb.
Txhim kho adhesion thiab txhim khu fluidity
Lwm cov tshuaj additives feem ntau ntxiv rau cov cement paste, xws li polymers, ntxhia admixtures, thiab lwm yam, uas yuav cuam tshuam rau cov dej ntawm cov cement paste. HPMC tuaj yeem ua kom lub zog sib txuas ntawm cov cement, ua rau slurry ntau yas thiab kua dej, yog li txhim kho kev tsim kho. Tsis tas li ntawd, HPMC tseem tuaj yeem txhim kho qhov adhesion ntawm cov cement thiab lwm yam khoom siv hauv tsev (xws li xuab zeb thiab gravel) thiab txo qhov tshwm sim ntawm kev sib cais.
Txhim kho kev tawg tsis kam
Txij li AnxinCel®HPMC tuaj yeem txhim kho cov dej khaws cia ntawm cov cement thiab ncua cov txheej txheem dej, nws tuaj yeem txhim kho qhov tawg ntawm cov ntaub ntawv cement. Tshwj xeeb tshaj yog nyob rau theem pib thaum lub zog cement tsis mus txog qib txaus, cov khoom siv cement yog qhov ua rau tawg. Los ntawm kev siv HPMC, qhov shrinkage tus nqi ntawm cov cement tuaj yeem ua rau qeeb thiab qhov tawg tsim los ntawm kev poob dej sai tuaj yeem txo.
2. Cov nyhuv ntawm HPMC hauv daim ntawv thov cement
Txhim kho cement workability
Cov nyhuv thickening ntawm HPMC ua rau cov cement paste ua haujlwm ntau dua. Rau ntau hom cement (xws li Portland cement zoo tib yam, ceev ziab cov cement, thiab lwm yam), HPMC tuaj yeem ua kom zoo dua qhov dej ntawm slurry thiab pab txhawb kev nchuav thiab molding thaum siv. Tsis tas li ntawd, HPMC tuaj yeem ua rau cov cement paste ruaj khov thaum lub sij hawm tsim kho, txo cov huab cua, thiab txhim kho kev tsim kho tag nrho.
Txhim kho cov cement zog
Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho lub zog ua haujlwm ntawm cov cement rau qee yam. Nws hloov cov kev faib dej hauv cov cement, txhawb nqa cov dej tsis sib haum ntawm cov cement hais, thiab yog li txhim kho qhov kawg hardening zog ntawm cov cement. Hauv kev siv cov tswv yim, ntxiv qhov tsim nyog ntawm HPMC tuaj yeem txhawb nqa cov tshuaj tiv thaiv thawj zaug ntawm cov cement thiab txhim kho compressive, flexural thiab tensile lub zog ntawm cov cement.
Txhim kho durability
Qhov sib ntxiv ntawm HPMC pab txhim kho cov kav ntev ntawm cov cement. Tshwj xeeb tshaj yog thaum cov cement raug corrosive ib puag ncig (xws li kua qaub, alkali, saline, thiab lwm yam), HPMC tuaj yeem txhim kho cov tshuaj tiv thaiv thiab permeability tsis kam ntawm cov cement, yog li ncua kev pab cuam lub neej ntawm cov cement. Tsis tas li ntawd, HPMC tuaj yeem txo cov capillary porosity ntawm cov cement sib tov thiab ua kom cov cement ntau dua, yog li txo nws cov kev puas tsuaj nyob rau hauv ib puag ncig hnyav.
Txhim kho ib puag ncig adaptability
Nyob rau hauv huab cua huab cua, kev ua haujlwm ntawm cov cement feem ntau cuam tshuam los ntawm kev hloov pauv ntawm qhov kub thiab txias. HPMC tuaj yeem ncua sijhawm teem sijhawm ntawm cov cement slurry thiab txo cov teeb meem tshwm sim los ntawm kev ziab sai lossis dej ntau dhau. Yog li ntawd, nws yog tshwj xeeb tshaj yog haum rau kev tsim kho ib puag ncig nrog kub, tsis tshua muaj kub thiab loj humidity hloov.
3. Kev siv HPMC zoo tshaj
Txawm hais tias daim ntawv thov ntawm HPMC hauv cov cement tuaj yeem txhim kho nws qhov kev ua tau zoo, nws siv yuav tsum tau ceev faj, tshwj xeeb tshaj yog cov nyiaj ntxiv. Kev sib ntxiv ntawm HPMC ntau dhau tuaj yeem ua rau cov viscosity ntawm cov cement paste siab dhau, ua rau tsis sib xws los yog kev tsim kho nyuaj. Feem ntau, tus nqi ntawm HPMC ntxiv yuav tsum tau tswj ntawm 0.1% thiab 0.5% ntawm cov cement pawg, thiab cov nqi tshwj xeeb yuav tsum tau hloov kho raws li hom cement tshwj xeeb, daim ntawv thov thiab ib puag ncig kev tsim kho.
Txawv qhov chaw, specifications thiab hloov kho qib ntawmHPMC kuj tseem yuav muaj qhov sib txawv ntawm cov khoom cement. Yog li ntawd, thaum xaiv HPMC, yam xws li qhov hnyav molecular, hydroxypropyl thiab methylation degree yuav tsum raug txiav txim siab kom tau txais kev hloov kho zoo tshaj plaws. nyhuv.
Raws li ib qho tseem ceeb ntawm cov cement modifier, AnxinCel®HPMC ho txhim kho kev ua hauj lwm, lub zog, durability thiab ib puag ncig adaptability ntawm cov cement los ntawm thickening, txhim kho dej tuav, txhim kho adhesion thiab tawg tsis kam. Nws daim ntawv thov dav hauv kev lag luam cement tsis tsuas yog txhim kho tag nrho cov kev ua tau zoo ntawm cov cement, tab sis kuj muab kev txhawb zog rau kev tshawb fawb thiab kev loj hlob ntawm cov khoom siv cement tshiab xws li cov pob zeb ua haujlwm siab thiab cov khoom siv hauv tsev. Raws li cov kev tsim kho txuas ntxiv nce lawv cov kev xav tau ntawm cov khoom siv, HPMC muaj cov ntawv thov dav dav hauv kev lag luam cement thiab yuav txuas ntxiv ua cov cement tseem ceeb hloov kho ntxiv.
Post lub sij hawm: Jan-16-2025