Hnub Kawg: 20 Lub Tsib Hlis, 2024

7. Thaum polycarboxylic acid admixture yog sim-sib xyaw (hauv kev tsim khoom), thaum tsuas yog qhov kev siv ntau npaum li cas, qhov pib ua haujlwm ntawm cov pob zeb yuav txaus siab, tab sis cov pob zeb poob yuav ntau dua; Yog li ntawd, thaum lub sij hawm sim-sib tov (ntau lawm), tus nqi yuav tsum tau nce kom tsim nyog. Tsuas yog los ntawm kev kho qhov ntau npaum li cas (uas yog, ncav cuag qhov saturation ntau npaum) tuaj yeem daws qhov teeb meem ntawm qhov poob loj.

8.Tom qab txo cov khoom siv cementitious, cov dej-cement piv yuav tsum tau ua kom nruj dua thaum lub sijhawm tsim khoom. Yog hais tias qhov poob qis yog loj, tib txoj kev yog kom nce tus nqi ntawm admixture thiab ntxiv cov admixture ob zaug. Tsis txhob ntxiv dej los daws qhov teeb meem, txwv tsis pub nws yuav yooj yim ua rau lub zog poob qis.

9. Polycarboxylate dej-txo tus neeg sawv cev yog ib yam khoom uas muaj cov dej-txo tus nqi thiab siab dispersion. Hauv kev tswj hwm ntau lawm, qhov fluidity Performance index (expansion) ntawm pob zeb yuav tsum tau siv los ntsuas qhov ua haujlwm ntawm cov pob zeb. Slump tsuas yog siv los ua tus nqi siv xwb.

10. Lub zog ntawm pob zeb yog tsuas yog txiav txim siab los ntawm cov dej-binder piv. Polycarboxylate dej-txo tus neeg sawv cev muaj cov yam ntxwv ntawm cov dej-txo tus nqi siab, uas tuaj yeem yooj yim txo cov dej haus hauv cov khoom sib xyaw ua ke, yog li ua tiav lub hom phiaj ntawm kev txo cov dej-binder piv thiab txo cov pob zeb lub zog. kev them nqi. Txij li thaum cov ntaub ntawv raw khoom hloov pauv ntau dua thaum lub sijhawm tsim khoom dua li kev sim, txhawm rau kom siv tau zoo ntawm cov khoom siv polycarboxylate superplasticizer, cov khoom siv yuav tsum tau hloov kho raws sijhawm raws li qhov cuam tshuam ntawm cov khoom siv raw, hloov pauv kub, thiab lwm yam. pob zeb thaum lub sij hawm tsim khoom. Kev noj tshuaj.

11. Polycarboxylic acid dej-txo cov tshuaj tsis tuaj yeem sib xyaw nrog naphthalene-raws li dej-txo cov neeg ua haujlwm. Thaum siv polycarboxylic acid dej-txo cov neeg ua hauj lwm, lub tov khoom thiab tov khoom tsheb uas tau siv naphthalene-raws li dej-txo cov neeg ua hauj lwm yuav tsum tau ntxuav kom huv si, txwv tsis pub cov polycarboxylic acid dej-txo tus neeg saib xyuas tej zaum yuav puas. Cov dej-txo tus neeg sawv cev poob nws cov dej-txo cov nyhuv.

12. Polycarboxylate superplasticizer yuav tsum tsis txhob sib cuag nrog cov ntaub ntawv hlau mus ntev. Txij li thaum polycarboxylate dej-txo tus neeg sawv cev cov khoom yog feem ntau acidic, mus sij hawm ntev kev sib cuag nrog hlau cov khoom yuav ua rau ib tug qeeb cov tshuaj tiv thaiv, uas tej zaum yuav txawm darken los yog blacken xim, ua rau ib tug poob ntawm cov khoom ua tau zoo. Nws raug nquahu kom siv cov thoob yas polyethylene lossis cov thoob stainless hlau rau kev khaws cia kom ntseeg tau tias kev ua haujlwm ruaj khov.