贝利特-硫铝酸钡钙水泥性能的试验研究

Study on properties of belite-barium calcium sulphoaluminate cement

试验研究了贝利特-硫铝酸钡钙水泥的性能,结果表明:该水泥具有较高的早期强度和长期强度,当其石膏掺量为10%时,3d、7d、28d和90d净浆抗压强度分别达到了45.0、61.9、82.1和85.6MPa。该水泥安定性良好,抗渗能力强,抗硫酸盐侵蚀能力强,其抗蚀系数大于1。该水泥在水化早期(14d内)膨胀率增加较快,而水化后期膨胀趋于稳定,且随石膏掺量的增加,其膨胀率逐渐增加。

The properties of belite-barium calcium sulphoaluminate cement were studied. The result showed that the cement had high compressive strength at early and long-term stage. If the gypsum content were 10%, the compressive strengths at 3d, 7d, 28d and 90d curing ages could be 45.0MPa, 61.9MPa, 82.1MPa and 85.6MPa. The cement had good volume soundness, excellent anti-permeability, excellent sulphate resistance, and the corrosion resistance coefficient exceeded 1. The rate of expansion increased fast at early hydration age （within 14d）, and became steady at late hydration age. The rate of expansion increased with increasing of gypsum addition.