Borida Dej reducer

Dej reducer yog ib qho kev sib xyaw ua ke uas tuaj yeem txo qhov sib xyaw ntawm cov dej thaum tswj cov slump ntawm pob zeb tsis hloov pauv. Feem ntau ntawm lawv yog anionic surfactants, xws li lignosulfonate, naphthalenesulfonate formaldehyde polymer, thiab lwm yam. Tom qab muab ntxiv rau cov pob zeb sib tov, nws tuaj yeem tawg cov cement hais, txhim kho nws txoj haujlwm, txo cov dej haus, txhim kho fluidity ntawm cov pob zeb sib tov; los yog txo cov cement noj thiab txuag cov cement.

qeb loj

Cov ntaub ntawv pom tau muab faib ua dej thiab hmoov. Cov ntsiab lus ntawm cov dej npaj yog feem ntau 20 feem pua, 40 feem pua ​​(tseem hu ua niam cawv), thiab 60 feem pua, thiab cov ntsiab lus ntawm cov hmoov npaj yog feem ntau 98 feem pua.

Raws li cov dej txo thiab ntxiv dag zog lub peev xwm ntawm cov dej txo tus neeg sawv cev, nws tau muab faib ua cov dej txo tus neeg sawv cev (tseem hu ua plasticizer, cov dej txo qis tsis tsawg dua 8 feem pua, sawv cev los ntawm lignosulfonate [2]), kev ua haujlwm siab. dej txo tus neeg saib xyuas (tseem hu ua superplasticizer, cov dej txo qis tsis tsawg dua 14 feem pua, suav nrog naphthalene, melamine, sulfamate, aliphatic, thiab lwm yam. [2]) thiab cov dej ua haujlwm siab (dej txo tus nqi tsis tsawg dua. 25% ) feem pua ​​, sawv cev los ntawm polycarboxylate superplasticizer [2]), thiab muab faib ua hom zog thaum ntxov, hom qauv thiab hom retarded.

Raws li cov ntaub ntawv muaj pes tsawg leeg, nws muab faib ua: (1) lignosulfonate; (2) polycyclic aromatic ntsev; (3) dej-soluble resin sulfonate.

Naphthalene-based superplasticizers, aliphatic superplasticizers, amino superplasticizers, polycarboxylic acid superplasticizers, thiab lwm yam.

Raws li cov tshuaj muaj pes tsawg leeg, nws feem ntau muab faib ua: lignosulfonate-based superplasticizers, naphthalene-based superplasticizers, melamine-based superplasticizers, sulfamate-based superplasticizers, thiab fatty acid-based superplasticizers. Cov khoom siv dej, polycarboxylate-based superplasticizers.