Study on Effect and Action Mechanism of Different Superplasticizer on Properties of Titanium Gypsum

摘要

The chemical modification of titanium gypsum was made by calcium lignosulfonate, naphthalene and polycarboxylate superplasticizer. The effect of different superplasticizer on the physical properties of titanium gypsum was studied. The test results show that the standard consistency water, setting time and mechanical strength of titanium gypsum had changed to different extent with the three types of superplasticizer added. Naphthalene superplasticizer had best modification effect on titanium gypsum and its optimum content was 3%. When the naphthalene superplasticizer dosage was 3%, the 2h flexural strength and the 2h compressive strength of sample were 1.15MPa and 2.37MPa. The micro structure of titanium gypsum hydration products was analysed by SEM and the action mechanism of superplasticizer was analysed.