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利用机械力激发钢渣和粉煤灰的活性,研究了机械力活化前后钢渣-粉煤灰基地聚合物水泥的耐盐腐蚀性能,并对其水化产物进行了物相分析和微观结构分析。结果表明,机械力活化后钢渣-粉煤灰基地聚合物水泥的抗压强度提高到46MPa,孔隙度减小,耐盐腐蚀性能提升。XRD和SEM分析表明,机械力活化前后样品中的水化产物主要为无定形凝胶,机械力活化后样品的结构更为致密;机械力活化后样品在5%Na_2SO_4和5%Na Cl溶液中浸泡60d后,少量水化产物能与硫酸根离子反应生成钙矾石,与氯离子反应可能生成了水化氯铝酸钙(3CaO·Al_2O_3·CaCl_2·10H_2O),造成样品抗压强度降低,但样品整体形貌保持完好,未出现大面积的破坏。
The mechanical properties of steel slag and fly ash were used to study the salt corrosion resistance of steel slag-fly ash base polymer cement before and after mechanical activation. The hydration products were analyzed by phase and microstructure. The results show that the compressive strength of steel slag-fly ash base polymer cement increases to 46MPa after mechanical activation, porosity decreases and salt corrosion resistance improves. The results of XRD and SEM showed that the hydration products in the samples before and after mechanical activation were mainly amorphous gels, and the structures of the samples after mechanical activation were denser than those in the samples with 5% Na_2SO_4 and 5% NaCl after mechanical activation After soaking for 60 days, a small amount of hydration product reacts with sulfate ions to form ettringite, which may generate hydrated calcium chloroaluminate (3CaO · Al 2 O 3 · CaCl 2 · 10H 2 O) when reacting with chloride ions, resulting in a decrease in compressive strength of the sample The overall shape of the sample remained intact without extensive damage.