(1) siv ntau dhau ntawm Polycarboxylate superplasticizer
Polycarboxylic acid dej txo tus neeg sawv cev muaj cov yam ntxwv ntawm kev txo cov dej siab thiab cov ntsiab lus qis (folding cov khoom 0.20% lossis ntau dua), thiab tuaj yeem pom tseeb txhim kho cov pob zeb poob qis. Tab sis qhov sib xyaw ua ke loj dhau, qhov txo qis dej siab yog siab (ze rau qhov txwv qhov sib xyaw, qhov txo qis dej ntau dua 40%), kev faib tawm muaj peev xwm muaj zog heev, yuav txo qis kev sib koom ua ke, yog li ntawd ntau dua tso dej dawb tso, ua rau kom muaj dej los ntshav ntau ntxiv. Tshwj xeeb tshaj yog kev siv qeeb tso qis qis tiv thaiv hom polycarboxylic acid dej txo qis, qhov ntau npaum li cas yooj yim dhau los ua rau pob zeb lag los ntshav loj, ua rau sib cais. Yog li ntawd, kev siv polycarboxylic acid superplasticizer, yuav tsum tau ua tiav thaum qhov kev sim, soj ntsuam ntawm kev hloov pauv hauv lub xeev.
(2) Polycarboxylate superplasticizer nkag tau rau qhov kub thiab txias thiab tso tawm qeeb
Piv nrog rau lwm cov dej - txo tus neeg sawv cev, dej - txo thiab poob qis - khaws cov khoom ntawm polycarboxylic acid dej - txo tus neeg sawv cev cuam tshuam loj heev los ntawm qhov kub thiab txias. Thaum qhov kub siab nyob rau lub caij ntuj sov, kev poob qis ntawm polycarboxylic acid superplasticizer nrog kev tiv thaiv kev poob qis zoo tuaj yeem tshwm sim thaum qhov kub poob sai. Yog li ntawd, thaum qhov ntsuas kub poob qis thaum siv polycarboxylic acid superplasticizer, yuav tsum yog thawj qhov kev sim tshuaj polycarboxylic acid superplasticizer thawj zaug, tsim kom muaj kev txuas ntxiv tsim nyog ntawm lub sijhawm sib xyaw, polycarboxylic acid superplasticizer tau faib tawm tag nrho, yog li kom zam tom qab vim yog tso tawm qeeb thiab ua lub luag haujlwm, ua rau cov dej tsis zoo khaws cia, dej nag.
