xov xwm

Hnub Kawg: 16 Lub Kaum Ob Hlis, 2024

Ntxiv qhov tsim nyog ntawm cov khoom sib xyaw ua ke tuaj yeem txhim kho lub zog thaum ntxov thiab kev ua haujlwm siab ntawm pob zeb. Cov pob zeb sib xyaw nrog cov neeg sawv cev thaum ntxov muaj zog muaj zog zoo dua thaum ntxov; ntxiv qhov tsim nyog tus nqi ntawm cov dej reducer thaum sib tov sib xyaw tuaj yeem txo cov dej. Thaum qhov sib piv ntawm cov dej-cement yog qhov tsawg, nws tuaj yeem ua kom cov pob zeb tsim tau zoo thiab muaj zog dua 28d tuaj yeem tau txais. Admixtures tuaj yeem txhim kho qhov ntom ntom ntawm cov cement, ua kom cov adhesion ntawm aggregate thiab cement, thiab txhim kho lub zog ntev ntawm cov pob zeb. Yog li ntawd, yog tias koj xav txhim kho lub zog thiab kev ua tau zoo ntawm cov pob zeb, koj tuaj yeem txiav txim siab ntxiv cov dej ua kom muaj txiaj ntsig zoo thiab cov khoom sib xyaw thaum sib tov sib xyaw.

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Dej reducer muaj qhov zoo ntawm kev txhim kho pob zeb ua haujlwm, txo cov dej siv, ua kom muaj zog, thiab txhim kho pob zeb ua haujlwm. Txawm li cas los xij, nyob rau hauv txoj kev xam ntawm tus nqi ntawm cov dej reducer, nws yog ib qho yooj yim kom tsis quav ntsej qhov adsorption ntawm hmoov cov ntaub ntawv nyob rau hauv qhob aggregates ntawm cov dej reducers. Cov dej reducer tso zis ntawm cov pob zeb uas tsis muaj zog yog qhov tsawg, thiab cov khoom siv hmoov hauv cov khoom sib xyaw tsis txaus tom qab adsorption. Txawm li cas los xij, cov dej reducer ntau npaum li cas ntawm cov pob zeb muaj zog yog qhov loj, thiab cov hmoov av adsorption ntawm cov hmoov sib xyaw tsis sib txawv ntawm cov hmoov uas tsis muaj zog, uas yuav ua rau cov dej muaj zog ntau dua kom tsawg.

Thaum tsim cov kev sib xyaw ua ke, cov dej txo qhov ntau npaum li cas yog txoj cai, tsis ntau dhau lossis tsawg dhau, uas yooj yim rau kev tswj hwm ntau lawm thiab ua kom muaj kev ruaj ntseg ntawm cov pob zeb zoo. Qhov no yog lub hom phiaj nrhiav los ntawm cov kws tshaj lij. Txawm li cas los xij, txawm tias cov khoom siv raw khoom siv yog ntuj lossis khoom siv, qee cov ntaub ntawv hmoov yog inevitably coj los rau hauv. Yog li ntawd, thaum tsim cov khoom sib xyaw, cov hmoov cov ntaub ntawv ntawm cov khoom siv raw cov ntaub ntawv yuav tsum tau txiav txim siab thaum xam cov dej reducer ntau npaum.

Ua ntej xam cov dej reducer ntau npaum li cas, qhov sib tov sib xyaw thiab cov dej reducer ntau npaum li cas ntawm cov khoom siv ntsuas ntsuas tau txiav txim siab los ntawm kev sim, thiab tom qab ntawd tag nrho cov hmoov ntim ntawm cov pob zeb yog xam raws li qhov sib xyaw ua ke, thiab cov dej reducer ntau npaum li cas yog xam; tom qab ntawd qhov kev suav ntau npaum li cas yog siv los xam cov dej reducer ntau npaum li cas ntawm lwm qib zog.

Nrog rau kev siv lub tshuab ua xuab zeb loj loj thiab nce cov khoom siv hmoov, cov hmoov absorbs los yog siv cov dej txo qis. Kev xam cov dej reducer siv tag nrho cov hmoov cov ntsiab lus ntawm cov khoom siv raw khoom yog yooj yim rau kev tswj thiab yog ib qho kev tshawb fawb ntau dua.


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  • Post lub sij hawm: Dec-18-2024