Hydroxypropyl Methylcellulose (HPMC) yog ib qho tshuaj polymer ntuj uas siv dav hauv kev tsim kho, tshuaj, khoom noj thiab lwm yam teb. Hauv kev lag luam cement, AnxinCel®HPMC feem ntau siv los ua cov khoom ntxiv los txhim kho kev ua tau zoo ntawm cement, thiab txhim kho kev ua haujlwm, kev ua haujlwm thiab qhov nyuaj kawg ntawm cov sib tov cement.
1. Cov yam ntxwv tseem ceeb thiab cov txheej txheem ntawm kev ua haujlwm ntawm HPMC
HPMC yog ib yam tshuaj uas tau los ntawm kev hloov kho cellulose los ntawm ethylation, hydroxypropylation thiab methylation. Nws cov qauv molecular suav nrog ntau pawg hydrophilic thiab hydrophobic, uas ua rau nws ua ntau lub luag haujlwm hauv cov tshuab cement. HPMC ua lub luag haujlwm hauv qab no hauv cement:
Cov nyhuv tuab
HPMC muaj cov nyhuv ua kom tuab thiab tuaj yeem txhim kho qhov viscosity ntawm cov cement paste, ua rau cov cement sib xyaw ua ke ntau dua thaum sib tov thiab zam kev stratification lossis sedimentation. Qhov no yog qhov tseem ceeb rau kev txhim kho qhov fluidity thiab ruaj khov ntawm cov cement paste, tshwj xeeb tshaj yog nyob rau hauv cov pob zeb ua haujlwm siab lossis lwm yam khoom siv cementitious, xyuas kom meej tias nws sau cov pwm zoo dua thiab muaj qhov ceev dua.
Txhim kho kev khaws dej
HPMC tuaj yeem tswj tau qhov dej ntws hauv cov cement paste thiab ncua lub sijhawm teeb tsa thawj zaug ntawm cov cement. Tshwj xeeb tshaj yog nyob rau hauv qhov kub siab lossis qhov chaw qhuav, nws tuaj yeem tswj tau qhov ntub ntawm cov cement paste thiab tiv thaiv kom qhuav ua ntej, yog li txhim kho kev ua haujlwm ntawm kev tsim kho. Kev khaws dej yog ib qho tseem ceeb hauv cov txheej txheem tsim kho ntawm cov ntaub ntawv cement thiab tuaj yeem tiv thaiv kev tsim cov kab nrib pleb.
Txhim kho kev nplaum thiab txhim kho kev ua kom du
Feem ntau cov tshuaj ntxiv rau hauv cov cement paste, xws li polymers, mineral admixtures, thiab lwm yam, uas yuav cuam tshuam rau qhov fluidity ntawm cement paste. HPMC tuaj yeem ua rau lub zog sib txuas ntawm cement, ua rau cov slurry ntau yas thiab kua, yog li txhim kho kev ua haujlwm ntawm kev tsim kho. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho qhov kev sib txuas ntawm cement thiab lwm yam khoom siv hauv tsev (xws li xuab zeb thiab pob zeb) thiab txo qhov tshwm sim ntawm kev sib cais.
Txhim kho qhov tawg tsis kam
Vim tias AnxinCel®HPMC tuaj yeem txhim kho qhov khaws dej ntawm cov cement thiab ncua cov txheej txheem hydration, nws kuj tseem tuaj yeem txhim kho qhov tsis kam ntawm cov khoom siv cement. Tshwj xeeb tshaj yog nyob rau theem thaum ntxov thaum lub zog cement tsis ncav cuag qib txaus, cov khoom siv cement feem ntau yuav tawg. Los ntawm kev siv HPMC, qhov nrawm ntawm cov cement tuaj yeem qeeb thiab qhov tawg ntawm cov cement los ntawm kev poob dej sai tuaj yeem txo qis.
2. Cov nyhuv ntawm HPMC hauv daim ntawv thov cement
Txhim kho kev ua haujlwm ntawm cov cement
Qhov ua kom tuab ntawm HPMC ua rau cov cement nplaum ua haujlwm tau zoo dua. Rau ntau hom cement (xws li Portland cement ib txwm muaj, cement qhuav sai, thiab lwm yam), HPMC tuaj yeem ua kom zoo dua qhov fluidity ntawm cov slurry thiab pab txhawb kev nchuav thiab pwm thaum lub sijhawm tsim kho. Tsis tas li ntawd, HPMC tuaj yeem ua rau cov cement nplaum ruaj khov dua thaum lub sijhawm tsim kho, txo cov pa phem, thiab txhim kho qhov zoo ntawm kev tsim kho.
Txhim kho lub zog ntawm cov cement
Kev ntxiv HPMC tuaj yeem txhim kho kev ua tau zoo ntawm cov cement rau qee yam. Nws hloov pauv qhov kev faib tawm ntawm cov dej hauv cov cement, txhawb kev sib xyaw ua ke ntawm cov khoom me me ntawm cov cement, thiab yog li ua rau lub zog tawv ntawm cov cement kawg. Hauv kev siv tiag tiag, kev ntxiv HPMC kom raug tuaj yeem txhawb kev sib xyaw ua ke ntawm cov cement thiab txhim kho lub zog compressive, flexural thiab tensile ntawm cov cement.
Kev ruaj khov zoo dua
Qhov ntxiv ntawm HPMC pab txhim kho qhov ruaj khov ntawm cov cement. Tshwj xeeb tshaj yog thaum cov cement raug rau cov chaw muaj corrosive (xws li acid, alkali, saline, thiab lwm yam), HPMC tuaj yeem txhim kho cov tshuaj tiv thaiv thiab permeability tsis kam ntawm cov cement, yog li ua kom lub neej ua haujlwm ntawm cov qauv cement ntev dua. Tsis tas li ntawd, HPMC tuaj yeem txo qhov capillary porosity ntawm cov cement sib xyaw thiab ua kom cov cement ceev dua, yog li txo nws qhov kev puas tsuaj hauv cov chaw ib puag ncig hnyav.
Txhim kho kev hloov pauv ib puag ncig
Nyob rau hauv huab cua hnyav heev, kev ua tau zoo ntawm cov cement feem ntau raug cuam tshuam los ntawm kev hloov pauv ntawm qhov kub thiab av noo. HPMC tuaj yeem ncua lub sijhawm teeb tsa ntawm cov cement slurry thiab txo cov teeb meem tshwm sim los ntawm kev qhuav sai lossis dej ntau dhau. Yog li ntawd, nws yog qhov tshwj xeeb tshaj yog rau cov chaw tsim kho nrog qhov kub siab, kub qis thiab kev hloov pauv ntawm cov av noo ntau.
3. Kev siv HPMC zoo tshaj plaws
Txawm hais tias kev siv HPMC hauv cov cement tuaj yeem txhim kho nws cov kev ua tau zoo, nws siv yuav tsum ceev faj, tshwj xeeb tshaj yog nyob rau hauv qhov ntau ntxiv. Kev ntxiv ntau dhau ntawm HPMC yuav ua rau qhov viscosity ntawm cov cement paste siab dhau, ua rau muaj kev sib xyaw tsis sib xws lossis teeb meem kev tsim kho. Feem ntau, qhov ntau ntawm HPMC ntxiv yuav tsum tau tswj hwm ntawm 0.1% thiab 0.5% ntawm cov cement loj, thiab tus nqi tshwj xeeb yuav tsum tau hloov kho raws li hom cement tshwj xeeb, daim ntawv thov thiab ib puag ncig kev tsim kho.
Cov chaw sib txawv, cov lus qhia thiab cov qib kev hloov kho ntawmHPMC kuj tseem yuav muaj cov teebmeem sib txawv ntawm cov khoom cement. Yog li ntawd, thaum xaiv HPMC, cov yam xws li qhov hnyav molecular, hydroxypropyl thiab methylation degree yuav tsum tau txiav txim siab kom tau txais kev hloov kho zoo tshaj plaws.
Ua ib qho tseem ceeb ntawm cov cement modifier, AnxinCel®HPMC txhim kho qhov ua haujlwm tau zoo, lub zog, kev ruaj khov thiab kev hloov pauv ib puag ncig ntawm cov cement los ntawm kev ua kom tuab, txhim kho kev khaws dej, txhim kho kev nplaum thiab kev tiv thaiv kab nrib pleb. Nws daim ntawv thov dav hauv kev lag luam cement tsis yog tsuas yog txhim kho kev ua tau zoo ntawm cov cement xwb, tab sis kuj muab kev txhawb nqa zoo rau kev tshawb fawb thiab kev tsim cov khoom cement tshiab xws li cov pob zeb ua tau zoo thiab cov ntaub ntawv tsim kho uas tsis ua rau ib puag ncig puas tsuaj. Raws li cov haujlwm tsim kho txuas ntxiv nce lawv cov kev xav tau rau kev ua tau zoo ntawm cov khoom siv, HPMC muaj kev cia siab dav hauv kev lag luam cement thiab yuav txuas ntxiv ua ib qho tseem ceeb ntawm cov khoom siv hloov kho cement.
Lub sijhawm tshaj tawm: Lub Ib Hlis-16-2025