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着重对在除冰盐和冻融循环共同作用下 ,磷酸盐水泥 (MPB)基材料的盐冻剥蚀破坏和与OPC混凝土之间的粘结强度损失进行了研究。试验结果表明MPB材料本身具有很高的抗盐冻剥蚀性能 ,不比引气 4 5 %～ 6 5 %的OPC混凝土差。MPB材料与引气OPC混凝土之间的粘结强度损失明显比非引气OPC混凝土小 ,且含气量愈大 ,粘结强度损失愈小。此外 ,还对MPB材料的气泡结构进行了分析 ,结果显示MPB材料通过化学引气同样可以获得良好的气泡结构参数 ,起到与物理引气一样的抗冻或抗盐冻效果。
Emphasis was placed on the desalination and destruction of phosphate cement (MPB) -based materials and the loss of bond strength with OPC concrete under deicing salt and freeze-thaw cycles. The experimental results show that the MPB material itself has high anti-freezing performance, not worse than 45% ~ 65% of the bleed OPC concrete. The loss of bond strength between MPB material and air-entrained OPC concrete is obviously smaller than that of non-air-bleed OPC concrete, and the larger the gas content, the smaller the bond strength loss. In addition, the bubble structure of the MPB material was also analyzed. The results show that the MPB material can also obtain good bubble structure parameters by chemical bleed air, which has the same antifreeze or salt frost effect as the physical bleed air.