Kev sib tham txog yam cuam tshuam rau Fluidity ntawm mortar

Lub fluidity ntawm mortar, feem ntau hu ua nws txoj haujlwm ua haujlwm lossis sib xws, yog cov cuab yeej tseem ceeb uas cuam tshuam rau ntau yam ntawm kev tsim kho, suav nrog kev yooj yim ntawm kev tso, compaction, thiab tiav. Ntau yam cuam tshuam rau qhov fluidity ntawm mortar, thiab kev nkag siab txog cov xwm txheej no yog qhov tseem ceeb rau kev ua tiav kev ua haujlwm zoo hauv kev tsim kho. Nov yog kev sib tham txog qee yam tseem ceeb cuam tshuam rau qhov fluidity ntawm mortar:

1. Water-to-Binder Ratio: Cov dej-rau-binder ratio, uas sawv cev rau qhov sib piv ntawm cov dej rau cov ntaub ntawv cementitious (cement, txiv qaub, los yog kev sib xyaw ua ke), cuam tshuam rau qhov fluidity ntawm mortar. Kev nce cov dej hauv cov dej tuaj yeem txhim kho kev ua haujlwm los ntawm kev txo cov viscosity thiab nce flowability. Txawm li cas los xij, cov dej ntau dhau tuaj yeem ua rau muaj kev sib cais, los ntshav, thiab txo lub zog, yog li nws yog ib qho tseem ceeb kom tswj tau qhov tsim nyog dej-rau-binder piv rau qhov xav tau fluidity yam tsis muaj kev cuam tshuam kev ua haujlwm ntawm cov tshuaj khib nyiab.
2. Hom thiab Gradation ntawm Aggregates: Hom, qhov loj me, cov duab, thiab kev sib tw ntawm cov khoom sib xyaw siv hauv cov tshuaj khib nyiab cuam tshuam rau nws cov khoom rheological thiab fluidity. Fine aggregates, xws li xuab zeb, txhim kho kev ua haujlwm los ntawm kev sau cov voids thiab lubricating hais, thaum coarse aggregates muab kev ruaj ntseg thiab lub zog. Cov qhab nia sib txuas nrog cov kev faib tawm ntawm cov me me tuaj yeem txhim kho qhov ceev thiab kub ntawm cov nplaim hluavtaws thiab cohesion.
3. Particle Size Distribution: Qhov loj me me ntawm cov khoom siv cementitious thiab aggregates cuam tshuam cov ntim ntim, kev sib txhuam sib txhuam, thiab kev ntws ntawm cov tshuaj khib nyiab. Cov khoom me me tuaj yeem sau cov voids ntawm cov khoom loj dua, txo cov kev sib txhuam tsis zoo thiab txhim kho flowability. Hloov pauv, qhov sib txawv ntawm qhov loj me tuaj yeem ua rau cov khoom sib cais, tsis zoo, thiab tsis muaj dej txaus.
4. Chemical Admixtures: Cov khoom siv tshuaj lom neeg, xws li dej reducers, plasticizers, thiab superplasticizers, tuaj yeem cuam tshuam qhov dej ntawm mortar los ntawm kev hloov nws cov khoom rheological. Cov dej reducers txo cov dej cov ntsiab lus uas yuav tsum tau ua rau qhov poob qis, txhim kho kev ua haujlwm tsis muaj kev cuam tshuam lub zog. Plasticizers txhim kho cohesion thiab txo viscosity, thaum superplasticizers muab siab flowability thiab self-leveling zog, tshwj xeeb tshaj yog nyob rau hauv tus kheej-compacting mortars.
5. Hom thiab Txheej Txheem: Hom thiab muaj pes tsawg leeg ntawm binders, xws li cov cement, txiv qaub, los yog cov khoom sib xyaw ua ke, cuam tshuam rau hydration kinetics, teem sij hawm, thiab rheological cwj pwm ntawm mortar. Ntau hom cement (xws li Portland cement, blended cement) thiab cov khoom siv cementitious ntxiv (piv txwv li, ya tshauv, slag, silica fume) tuaj yeem cuam tshuam rau qhov dej thiab qhov sib xws ntawm mortar vim qhov sib txawv ntawm qhov loj me, reactivity, thiab hydration yam ntxwv.
6. Mixing Procedure and Equipment: Cov txheej txheem sib tov thiab cov cuab yeej siv los npaj cov tshuaj khib nyiab tuaj yeem cuam tshuam nws cov fluidity thiab homogeneity. Cov txheej txheem sib xyaw kom zoo, suav nrog lub sijhawm sib xyaw kom tsim nyog, nrawm, thiab ua ntu zus ntawm cov khoom sib ntxiv, yog qhov tseem ceeb rau kev ua tiav cov khoom sib txawv ntawm cov khoom xyaw thiab cov khoom sib xws. Kev sib xyaw tsis raug tuaj yeem ua rau tsis txaus hydration, particle segregation, thiab tsis sib xws ntawm cov khoom sib xyaw, cuam tshuam rau cov dej ntws thiab kev ua haujlwm ntawm mortar.
7. Environmental Conditions: Ib puag ncig yam xws li kub, av noo, thiab cua ceev tuaj yeem cuam tshuam cov dej ntawm cov tshuaj khib nyiab thaum sib tov, kev thauj mus los, thiab kev tso kawm. Kev kub siab dua ua kom dej thiab teeb tsa, txo kev ua haujlwm thiab ua rau muaj kev pheej hmoo ntawm cov yas shrinkage tawg. Qhov kub tsis tshua muaj siab tuaj yeem ua rau txo qis thiab txo cov dej ntws tawm, yuav tsum tau hloov kho kom sib xyaw cov khoom sib xyaw thiab cov tshuaj sib xyaw kom tswj tau qhov xav tau ua haujlwm.

Lub fluidity ntawm mortar yog cuam tshuam los ntawm kev sib xyaw ua ke ntawm cov khoom siv, kev tsim qauv, kev sib xyaw ua ke, thiab ib puag ncig. Los ntawm kev ua tib zoo xav txog cov xwm txheej no thiab ua kom zoo tshaj qhov sib xyaw ua ke, cov kws tsim kho tuaj yeem ua tiav mortar nrog qhov xav tau fluidity, sib xws, thiab kev ua tau zoo rau cov kev siv tshwj xeeb thiab cov kev xav tau ntawm qhov project.