Cov dej puas ua rau tus neeg ntshai tsis sov? Koj yuav tsum tau saib
Jul 01, 2020
Raws li nws cov dej-txo thiab nce kev ua haujlwm muaj peev xwm, nws tau muab faib ua cov dej ua kom txo qis tus neeg sawv cev (tseem hu ua plasticizer) thiab superplasticizer (tseem hu ua high-efficiency dej txo tus neeg sawv cev), thiab lawv muab faib ua thawj-chav kawm thiab tsim nyog khoom.
Raws li cov ntaub ntawv muaj pes tsawg leeg, nws muab faib ua: (1) dej sulfonate; (2) polycyclic alicyclic ntsev; (3) dej-soluble resin sulfonate.
