Effect of P2O5 incorporated in slag on the hydration characteristics of cement-slag system

This paper presents the influence of P2O5 incorporated in slag on hydration characteristics cement-slag system. It was found that gradual addition phosphorus oxide did not change overall mineralogy products. Except retardation dormant stage, chemically bound water and portlandite contents, degree slag, pore structure at all investigated ages were similar among pastes with different percentages. Furthermore, significantly higher amount monosulfate observed as content increased. In addition, a Al/Si atomic ratio measured C-S(A)-H gel phase formed cement matrix. However, Ca/Si Mg/Al hydrotalcite-like determined pastes, irrespective P2O5. contrast to magnesium ion which retained within original boundary, ions could migrate into Therefore, P/Si C-S-H increased increasing reaching up ∼0.08.