$C_3A$량이 상이한 시멘트 경화체의 황산염 팽창 거동에 대한 알카리프리계 급결제의 영향

Influence of Alkali-free based-Accelerator on the Expansion Behaviors of Cement Matrices with Different $C_3A$ Content under Sulfate Attack

Sulfate resistance of mortar specimens with or without alkali-free accelerator exposed to sulfate solutions for 360 days was investigated. Test results confirms a negative effect of alkali-free accelerator on the sulfate deterioration, irrespective of attacking sources. Based on the ASTM C1012 expansion test, the experimental findings demonstrated that higher $C_3A$ content in cement led to the higher expansion, especially in the mortar specimens with alkali-free accelerator.