Cov neeg ua haujlwm nthuav dav
Apr 25, 2022
Cov neeg ua haujlwm nthuav dav
Expansive agents yog siv los txo cov qhob shrinkage. Muaj ob hom khoom siv nthuav dav tam sim no: ib qho yog ua los ntawm calcium sulphoaluminate, qhov thib ob yog cov txiv qaub tuag. Qee cov qauv kev lag luam yog kev sib xyaw ua ke ntawm ob cov ntaub ntawv nthuav dav. Raws li ntau npaum li cas ntawm cov expansive agents no feem ntau me me, lawv yog diluted nyob rau hauv ib tug tej yam kom muaj nuj nqis ntawm Portland xis mas thiaj li yuav txo tau cov nyhuv ntawm qhov yuam kev ntawm ntau npaum. Thaum siv tus neeg sawv cev nthuav dav, nws yog ib qho tseem ceeb heev uas yuav tsum tau ua kom dej kho pob zeb kom zoo thiaj li yuav tsum tau muab cov dej tsim nyog rau tus neeg sawv cev nthuav dav kom tau txais qhov xav tau nthuav dav. Qhov nthuav dav tau nyob ntawm qhov tseem ceeb tsis yog nyob ntawm qhov ntau npaum li cas ntawm tus neeg sawv cev nthuav dav tab sis kuj nyob ntawm qhov kub thiab txias thiab kev ua haujlwm ntawm cov dej kho. Kev siv cov khoom siv nthuav dav yog qhov yooj yim heev thiab siv tau zoo, yog tias cov dej kho tau zoo siv rau ntawm pob zeb thiab qhov kub tsis txias heev.
