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聚合物对发泡水泥制品孔结构和性能影响

Keywords: 发泡水泥制品,聚合物,孔隙率,孔径,强度

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Abstract:

以快硬硫铝酸盐水泥作为胶凝材料,干密度为200kg/m3的发泡水泥为对象,研究乳液和胶粉对发泡水泥孔隙率、孔径分布、孔径大小和强度的影响.结果显示:随着聚合物掺量的增加,发泡水泥制品的孔隙率不随聚合物掺量的增加而发生变化,气孔的孔径逐渐变小,强度不断增大.当乳液和胶粉外掺量分别为2.5%时,发泡水泥28d的抗压强度、抗折强度和垂直表面拉伸强度分别增加8%、13%、28%和5%、10%、25%.

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