Hnub Kawg: 10, Nov,2025

Qhov ntau npaum ntawm admixtures tsis yog tus nqi ruaj khov thiab yuav tsum tau hloov kho dynamically raws li cov yam ntxwv ntawm cov khoom siv raw, hom phiaj xwm thiab ib puag ncig.

(1) Kev cuam tshuam ntawm cov khoom cement Cov ntxhia muaj pes tsawg leeg, kev ua kom zoo thiab gypsum daim ntawv ntawm cov cement ncaj qha txiav txim siab cov khoom siv sib xyaw. Cement nrog cov ntsiab lus C3A siab (> 8%) muaj qhov muaj zog adsorption muaj peev xwm rau cov dej txo qis thiab qhov ntau npaum li cas yuav tsum tau nce 10-20%. Rau txhua txhua 50m2 / kg nce hauv cov cement tshwj xeeb thaj chaw, cov dej txo qis yuav tsum tau nce 0.1-0.2% kom npog thaj tsam loj dua. Rau cov cement nrog anhydrite (dihydrate gypsum cov ntsiab lus <50%), cov dej reducer adsorption tus nqi qeeb thiab qhov ntau npaum li cas yuav raug txo los ntawm 5-10%, tab sis lub sij hawm sib tov yuav tsum tau txuas ntxiv kom ntseeg tau tias muaj kev sib txawv.

(2) Kev cuam tshuam ntawm cov ntxhia admixtures Lub adsorption yam ntxwv ntawm cov ntxhia admixtures xws li ya tshauv thiab slag hmoov yuav hloov qhov zoo concentration ntawm admixtures. Lub peev xwm adsorption ntawm Class I ya tshauv (dej thov piv ≤ 95%) rau cov dej reducers tsuas yog 30-40% ntawm cov cement. Thaum hloov 20% ntawm cov cement, cov dej txo qis tuaj yeem txo los ntawm 5-10%. Thaum qhov chaw tshwj xeeb ntawm slag hmoov yog ntau dua 450m2 / kg, qhov kev siv tshuaj ntxiv yuav tsum tau nce 5-8% thaum hloov 40% ntawm cov cement. Thaum ya tshauv thiab slag hmoov sib tov nyob rau hauv ib tug 1: 1 piv (tag nrho hloov pauv tus nqi 50%), cov dej reducer npaum li cas yuav txo tau los ntawm 3-5% piv nrog ib tug slag hmoov system vim lub complementary adsorption yam ntxwv ntawm ob. Vim tias qhov loj me ntawm thaj tsam ntawm silica fume (> 15000m2 / kg), cov dej txo qis yuav tsum tau nce 0.2-0.3% rau txhua 10% ntawm cov cement hloov.

(3) Kev cuam tshuam ntawm cov khoom sib sau Cov av nkos thiab qhov loj me me ntawm cov khoom sib sau ua ke yog lub hauv paus tseem ceeb rau kev kho qhov ntau npaum li cas. Rau txhua 1% nce hauv pob zeb hmoov av cov ntsiab lus (<0.075mm particles) nyob rau hauv cov xuab zeb, cov dej reducer ntau npaum li cas yuav tsum tau nce los ntawm 0.05-0.1%, raws li cov qauv ntxeem tau ntawm cov pob zeb plua plav yuav nqus cov admixture. Thaum cov ntsiab lus ntawm koob-zoo li tus thiab flake aggregate tshaj 15%, cov dej reducer ntau npaum li cas yuav tsum tau nce los ntawm 10-15% los xyuas kom meej encapsulation. Ua kom qhov siab tshaj qhov me me ntawm cov ntxhib sib sau los ntawm 20mm txog 31.5mm txo qhov tsis muaj qhov sib piv, thiab qhov ntau npaum li cas tuaj yeem txo los ntawm 5-8%.
Qhov ntau npaum ntawm admixtures tsis yog tus nqi ruaj khov thiab yuav tsum tau hloov kho dynamically raws li cov yam ntxwv ntawm cov khoom siv raw, hom phiaj xwm thiab ib puag ncig.

(1) Kev cuam tshuam ntawm cov khoom cement Cov ntxhia muaj pes tsawg leeg, kev ua kom zoo thiab gypsum daim ntawv ntawm cov cement ncaj qha txiav txim siab cov khoom siv sib xyaw. Cement nrog cov ntsiab lus C3A siab (> 8%) muaj qhov muaj zog adsorption muaj peev xwm rau cov dej txo qis thiab qhov ntau npaum li cas yuav tsum tau nce 10-20%. Rau txhua txhua 50m2 / kg nce hauv cov cement tshwj xeeb thaj chaw, cov dej txo qis yuav tsum tau nce 0.1-0.2% kom npog thaj tsam loj dua. Rau cov cement nrog anhydrite (dihydrate gypsum cov ntsiab lus <50%), cov dej reducer adsorption tus nqi qeeb thiab qhov ntau npaum li cas yuav raug txo los ntawm 5-10%, tab sis lub sij hawm sib tov yuav tsum tau txuas ntxiv kom ntseeg tau tias muaj kev sib txawv.

(2) Kev cuam tshuam ntawm cov ntxhia pob zeb admixtures Lub adsorption yam ntxwv ntawm cov ntxhia admixtures xws li ya tshauv thiab slag hmoov yuav hloov qhov zoo concentration ntawm admixtures. Lub peev xwm adsorption ntawm Class I ya tshauv (dej thov piv ≤ 95%) rau cov dej reducers tsuas yog 30-40% ntawm cov cement. Thaum hloov 20% ntawm cov cement, cov dej txo qis tuaj yeem txo los ntawm 5-10%. Thaum qhov chaw tshwj xeeb ntawm slag hmoov yog ntau dua 450m2 / kg, qhov kev siv tshuaj ntxiv yuav tsum tau nce 5-8% thaum hloov 40% ntawm cov cement. Thaum ya tshauv thiab slag hmoov sib tov nyob rau hauv ib tug 1: 1 piv (tag nrho hloov pauv tus nqi 50%), cov dej reducer npaum li cas yuav txo tau los ntawm 3-5% piv nrog ib tug slag hmoov system vim lub complementary adsorption yam ntxwv ntawm ob. Vim tias qhov loj me ntawm thaj tsam ntawm silica fume (> 15000m2 / kg), cov dej txo qis yuav tsum tau nce 0.2-0.3% rau txhua 10% ntawm cov cement hloov.

(3) Kev cuam tshuam ntawm cov khoom sib sau Cov av nkos thiab qhov loj me me ntawm cov khoom sib sau ua ke yog lub hauv paus tseem ceeb rau kev kho qhov ntau npaum li cas. Rau txhua 1% nce hauv pob zeb hmoov av cov ntsiab lus (<0.075mm particles) nyob rau hauv cov xuab zeb, cov dej reducer ntau npaum li cas yuav tsum tau nce los ntawm 0.05-0.1%, raws li cov qauv ntxeem tau ntawm cov pob zeb plua plav yuav nqus cov admixture. Thaum cov ntsiab lus ntawm koob-zoo li tus thiab flake aggregate tshaj 15%, cov dej reducer ntau npaum li cas yuav tsum tau nce los ntawm 10-15% los xyuas kom meej encapsulation. Ua kom qhov siab tshaj qhov me me ntawm cov ntxhib sib sau los ntawm 20mm txog 31.5mm txo qhov tsis muaj qhov sib piv, thiab qhov ntau npaum li cas tuaj yeem txo los ntawm 5-8%.