Effect of Aminosulphonate Based Superplasticizer On the Properties of Slag Pastes

摘要

This study indicates how aminosulphonate (AS) based superplasticizer affects the properties of slag pastes activated by NaOH, such as adsorption, zeta potential and mini slump. It was concluded that the adsorption of superplasticizer on slag pastes depended directly on the dosage of the superplasticizer and the retarder. Slag particles grounded with the retarder YP-3 adsorbed 1.53 times of superplasticizer AS as much as pure slag particles at 1.5% mass of the slag, and the absolute value increment of the zeta potential of the slag paste suspension containing the retarder YP-3 is 15.20mV, compared with 9.81mV in the system without YP-3. Besides, the Slag pastes activated by NaOH containing the retarder YP-3 show better rheological properties and lower fluidity loss over time.