Thermal thiab mechanical zog: kev kawm
Nws qhia tau hais tias HPMC tuaj yeem txhim kho cov thermal thiab mechanical zog ntawm plastering mortar. Los ntawm kev ntxiv ntau qhov sib txawv ntawm HPMC (0.015%, 0.030%, 0.045%, thiab 0.060%), cov kws tshawb fawb pom tias cov khoom sib zog tuaj yeem tsim nrog qhov hnyav ntawm 11.76% vim qhov porosity siab los ntawm HPMC. Qhov no porosity siab pab nyob rau hauv thermal rwb thaiv tsev, txo cov khoom siv hluav taws xob conductivity txog li 30% thaum tuav ib tug ruaj kub flux ntawm kwv yees li 49 W thaum raug rau tib lub tshav kub flux. Qhov tsis kam mus rau tshav kub hloov mus los ntawm lub vaj huam sib luag sib txawv nrog tus nqi ntawm HPMC ntxiv, nrog rau kev koom ua ke siab tshaj plaws ntawm cov khoom ntxiv uas ua rau 32.6% nce hauv thermal resistance piv rau cov ntaub ntawv sib xyaw.
Kev tuav dej, kev ua haujlwm thiab lub zog: lwm txoj kev kawm
Nws tau pom tias HPMC tuaj yeem txhim kho cov dej tuav, cohesion thiab sag tsis kam ntawm mortar, thiab txhim kho lub zog tensile thiab kev sib raug zoo ntawm mortar. Nyob rau tib lub sijhawm, HPMC tuaj yeem cuam tshuam qhov tsim cov kab nrib pleb hauv cov tshuaj khib nyiab thiab txo cov yas tawg qhov ntsuas. Cov dej tuav ntawm mortar nce raws li qhov viscosity ntawm HPMC nce. Thaum lub viscosity ntawm HPMC siab tshaj 40000 mPa·s, cov dej tuav tsis tau ntxiv lawm.
Viscosity test method: Thaum kawm txog viscosity test method ntawm high-viscosity hydroxypropyl methylcellulose
, pom tias HPMC muaj qhov zoo dispersion, emulsification, thickening, bonding, dej tuav thiab kua nplaum tuav cov khoom. Cov khoom no ua rau HPMC dav siv hauv kev tsim kho kev lag luam.
Volume stability: Kev kawm txog cov txiaj ntsig ntawm HPMC ntau npaum li cas ntawm qhov ntim thaum ntxov ntawm Portland cement-aluminate cement-gypsum ternary composite self-leveling mortar
Nws qhia tau tias HPMC muaj qhov cuam tshuam loj rau kev ua haujlwm ntawm tus kheej-leveling mortar. Tom qab koom nrog HPMC, kev ua haujlwm ntawm tus kheej-leveling mortar xws li los ntshav thiab kev sib cais sib cais tau zoo dua. Txawm li cas los xij, ntau npaum li cas tsis yog qhov zoo rau qhov fluidity ntawm tus kheej-leveling mortar. Qhov pom zoo npaum li cas yog 0.025% ~ 0.05%. Nyob rau tib lub sijhawm, raws li HPMC cov ntsiab lus nce, lub zog compressive thiab flexural zog ntawm tus kheej-leveling mortar txo mus rau qhov sib txawv.
Qhov cuam tshuam rau lub zog ntawm plastically tsim ceramic ntsuab lub cev: ib qho kev sim
Cov txiaj ntsig ntawm HPMC cov ntsiab lus sib txawv ntawm lub zog flexural ntawm ceramic ntsuab lub cev tau kawm, thiab nws tau pom tias lub zog flexural thawj zaug nce thiab tom qab ntawd txo qis nrog qhov nce ntawm HPMC cov ntsiab lus. Thaum HPMC cov nyiaj ntxiv yog 25%, lub cev ntsuab lub zog yog qhov siab tshaj plaws ntawm 7.5 MPa.
Dry mix mortar performance: kev kawm
Nws tau pom tias qhov sib txawv thiab cov viscosities ntawm HPMC muaj qhov cuam tshuam loj rau kev ua haujlwm thiab cov khoom siv ntawm cov tshuaj khib nyiab qhuav. HPMC muaj peev xwm khaws dej thiab ua kom tuab. Thaum noj ntau dua 0.6%, fluidity ntawm mortar txo; Thaum cov koob tshuaj yog 0.4%, cov dej tuav tus nqi ntawm cov tshuaj khib nyiab tuaj yeem ncav cuag 100%. Txawm li cas los xij, HPMC txo qis zog, ntau li 75%.
Qhov cuam tshuam rau cov cement-stabilized tag nrho-qhov tob qhov txias rov ua dua tshiab: kev kawm
Nws tau pom tias HPMC yuav txo cov flexural thiab compressive zog ntawm cov cement mortar specimens tom qab cov cement hydration vim huab cua-entraining nyhuv. Txawm li cas los xij, cov cement yog hydrated nyob rau hauv dispersion ntawm HPMC yaj nyob rau hauv dej. Piv nrog rau cov cement uas hydrated ua ntej thiab tom qab ntawd tov nrog HPMC, qhov flexural thiab compressive zog ntawm cov cement mortar specimens tau nce.
Cov ntaub ntawv sim thiab kev tshawb fawb no qhia tau tias HPMC muaj txiaj ntsig zoo hauv kev txhim kho cov dej khaws cia ntawm mortar, txhim kho kev ua haujlwm, thiab txhim kho kev ua haujlwm thermal, tab sis nws kuj tseem yuav cuam tshuam rau lub zog thiab ntim ruaj khov ntawm mortar. Yog li ntawd, nyob rau hauv kev siv tswv yim, ntau npaum li cas thiab specifications ntawm HPMC yuav tsum tau xaiv kom tsim nyog raws li cov kev cai engineering thiab ib puag ncig tej yam kev mob kom ua tau zoo mortar kev ua tau zoo.
Post lub sij hawm: Oct-29-2024