Lub caij ntuj no xav tau kev siv dej txo tus neeg sawv cev, raws li qhov yuav tsum tau siv tus neeg sawv cev thaum ntxov, tiv thaiv kev tiv thaiv kab mob tuaj yeem ceev lub sijhawm kom rhuav tshem, yog li cov qhob teeb tsa lub sijhawm me ntsis ua ntej, yog tias qhov kub poob qis dua 0 degrees, tuaj yeem ntxiv tshuaj tua kab mob, tiv thaiv pob zeb ua kom khov txhua qhov xav tau ntxiv thiab rho dej, vim tias tus neeg sawv cev txo cov dej tuaj yeem txo cov pob zeb ua kom ntau ntau, cov cement ntau, kev txuag nqi.
Nyob rau lub caij ntuj no, qhov kub thiab txias sib txawv ntawm nruab hnub thiab hmo ntuj nws txawv heev, yog li hauv kev tswj ntau lawm, yuav tsum tau them rau pob zeb pob zeb kev hloov pauv thiab raws sij hawm kho cov tshuaj ntawm cov dej-txo tus neeg sawv cev, thiaj li ua tiav txoj ntsiab cai ntawm kev sib tov tsawg ntawm cov kub thiab siab sib xyaw ntawm qhov kub.
Cov dej ua noj ntawm pob zeb yuav tsum tau tswj hwm nruj me ntsis hauv cov txheej txheem ntawm kev siv polycarboxylic acid dej kom txo qis.
Thaum tus nqi ntawm cov dej ntau dhau, kev cais cov pob zeb yuav tshwm sim, los ntshav, tawv thiab cov ntsiab lus roj yog qhov loj heev thiab lwm yam tshwm sim.
Hauv cov txheej txheem ntawm kev siv polycarboxylic acid superplasticizer, qhov ua rau lub ntsej muag qhuav ntawm kev ua tiav ntawm cov av tawv kuj tseem me me, tab sis qhov no tsis txhais tau tias cov pob zeb ua kev sib xyaw nrog polycarboxylic acid superplasticizer tuaj yeem kho tsis tau, kev kho ua ntej yuav tsum tau ntxiv dag zog kom tiv thaiv qhov tshwm sim ntawm kev tawg
