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为揭示胶粉的掺入对水泥基材料力学性能及抗渗性、抗冻性的影响,文章采用量化的XRD(X射线衍射分析)及压汞试验法,研究不同胶粉掺量对水泥水化及水泥基材料微观孔结构的影响。通过分析了不同胶粉掺量下样品中各物相的质量分数及样品孔径的分布范围及其在总孔隙中的占比,量化研究胶粉改性水泥基材料的水泥水化情况及孔结构分布。研究结果表明:随着胶粉掺量的增加,样品中硅酸三钙、硅酸二钙、铝酸三钙及铁铝酸四钙呈现逐渐增加的趋势,而钙钒石、氢氧化钙及无定形物则呈现逐渐下降的趋势,说明胶粉抑制了水泥的水化;直径为0~50nm的孔径数量呈现减少的趋势,而大于1000nm孔径则呈现出增大的趋势,说明胶粉的掺入改善了水泥基材料的抗冻性能而降低了力学强度。
In order to reveal the influence of rubber powder on the mechanical properties, impermeability and frost resistance of cement-based materials, quantitative XRD (X-ray diffraction) and mercury intrusion porosimetry Influence of microcosmic pore structure of cementitious materials. Through analyzing the mass fraction of each phase and the distribution range of sample pore size and its proportion in the total pore volume, the quantitative study of the cement hydration and the pore structure of cement-modified cement-based materials distributed. The results show that with the increase of the content of powdered cement, the content of tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium aluminate tend to increase gradually, while the contents of ettringite, calcium hydroxide and The amorphous material shows a gradual downward trend, indicating that the cement inhibits the hydration of cement; the diameter of 0 ~ 50nm pore size showed a decreasing trend, while the pore size of greater than 1000nm showed an upward trend, indicating the mixed powder Improves the cold resistance of cement-based materials while reducing the mechanical strength.