Hnub Tim:11, Sep,2023

Txij li thaum 1980s, admixtures, feem ntau yog cov dej ua haujlwm loj, tau nce hauv lub zog hauv tsev, tshwj xeeb tshaj yog cov pob zeb ua ke, thiab ua cov khoom siv tsis tau, thiab muaj cov khoom siv tsis tseem ceeb. Raws li malhotra taw tes ntawm thawj lub rooj sib tham thoob ntiaj teb ntawm kev txhim kho dej khov kho yog qhov tseem ceeb ntawm kev ua haujlwm ntawm cov qhob noom thev naus laus zis hauv kev kawm ua vaj tse 20. " Tsuas muaj qee qhov kev sib tsoo tseem ceeb hauv kev txhim kho cov thev naus laus zis ntau xyoo, ib qho uas yog kev txhim kho cov pa tawm ntawm cov pob zeb ua haujlwm hauv North America;Tus superplasticizerPuas yog lwm qhov kev tawg uas yuav muaj kev cuam tshuam loj heev rau kev tsim khoom thiab cov khoom siv ntawm kev sib tw tau ntau xyoo los.

Tus superplasticizerHauv qee lub tebchaws tau hutus superplasticizer, raws li lub npe qhia, nws yog qhov haum heev rau kev npaj ntawm superplasticized qhob ke. Ntawm chav kawm, nws yog qhov tsim nyog rau kev sib xyaw ua ke nrog cov dej ntws loj, cov slurry loj thiab cov khoom siv dej qis, uas yog tso tawm kom muaj zog.

Txawm li cas los xij, rau qee lwm cov pob zeb ua kom zoo, xws li pob zeb ua rau hauv cov kab ke loj (txog 150 hli), cov slurry ntim yog qhov loj thiab cov pob zeb tsis loj, thiab cov pob zeb yuav tsum tau cog lus Los ntawm kev siv kev co kom muaj zog los yog kev co cov kev txiav txim qov, lub siab ua haujlwm dej reducer yuav tsis haum. Txhawm rau khaws cov dej-dab tsi tsis hloov pauv, txhawm rau kom tau raws li cov khoom siv dej ua ke, thiab txo cov khoom kom haum rau dej, ntau yam kev tsim kho mob hydraulic kuj tseem sib xyaw nrog High Efficiency Dej reducer. Qhov tseeb, xws li daim ntawv thov yog muaj teeb meem, vim tias muaj cov roj hmab dej sib xyaw ua ke, thiab vim muaj cua sib txo qis, nce qhov ntim ntawm slurry, yog li Thaum cov dej tau haus thiab cov nyiaj cog qoob loo tau txo tib lub sijhawm, uas yog, thaum lub ntim ntawm slurry yog txo, nws tuaj yeem tswj hwm cov kev sib npaug. Kom ntseeg tau tias muaj qhov chaw txaus los sau cov aggregate, qhwv cov aggregate thiab muab ib qho slurry ua haujlwm yog qhov tsim nyog rau kev sib xyaw ua ke tom qab pouring.

Tsis tas li ntawd, lub compressive lub zog ntawm cov dej sib xyaw nrog cov neeg muaj zog dej siab yuav tau txhim kho lub zog dej kom zoo dua tom qab kev loj hlob hauv lub zog yog feem ntau, thiab cov kev sib tsoo tawg, yog li qhov dav dav, Kev tsim kho ntawm cov pob zeb ua ke los yog choj vaj huam sib luag yuav tsum ceev faj nrog cov dej ua haujlwm siab uas txo tus neeg sawv cev dej siab. Qhov tseeb, hauv kev npaj ntawm cov ntau tshaj plaws ntawm C30 hauv kev tsim kho pej xeem thiab cov nyiaj txiag qib siab (yuav tsum tau nyiaj ntau dua li 1/2 tsis yog qhov tseem ceeb.