钙、铝相协同作用对碱激发矿渣胶凝材料性能的影响
Effect of synergistic action of calcium and aluminum phases on the performance of alkali-activated slag cementitious materials
关键词：
碱激发材料；钙、铝相；砂浆；孔结构；强度；耐久性能
Key words：
Alkali-activated material; Calcium and aluminum phase; Mortar; Pore structure; Strength; Durability
刊期：
2025年第7期
DOI：
10.19761/j.1000-4637.2025.07.082.06
文章编号：
基金项目：
国家自然科学基金项目（52108244）。
作者：
何雷军1，郭浩宇2，3，*，黄 飞4，陈 浩1，王智友1
单位：
1.中建三局第一建设工程有限责任公司，湖北 武汉 430040；2.武汉理工大学 土木工程与建筑学院，湖北 武汉 430070；3.武汉理工大学三亚科教创新园，海南 三亚 572000； 4.武汉五环项目管理有限公司，湖北 武汉 430040
摘要
摘 要：用钙相（氢氧化钙、亚硝酸钙、水泥）和铝相（纳米氧化铝、偏高岭土）补充材料等质量部分取代矿渣，制备了碱激发矿渣胶凝材料，研究了钙、铝相协同作用对含此胶凝材料砂浆孔结构、工作性、力学性能、抗氯离子渗透性能、体积稳定性和干燥失水率的影响。结果表明：除亚硝酸钙组外，其余钙、铝相组合均在不同程度上细化了砂浆的孔结构，提升了砂浆的力学和耐久性能，其中，水泥和偏高岭土组砂浆的孔隙率最低，力学性能、抗氯离子渗透性能、体积稳定性最佳。
Abstract: Alkali-activated slag cementitious materials were prepared by partially substituting slag with supplementary calcium phase(calcium hydroxide, calcium nitrite, cement) and aluminum phase(nanoalumina, metakaolin) materials. The effects of the synergistic action of calcium and aluminum phases on the pore structure, workability, mechanical properties, chloride ion penetration resistance, volume stability, and drying water loss rate of mortar containing the alkali-activated slag cementitious materials were investigated. The results show that, except for the calcium nitrite group, the other combinations of calcium and aluminum phases refine the pore structure of the mortar, and improve the mechanical properties and durability of the mortar to varying degrees. Notably, the group of mortar with cement and metakaolin exhibits the lowest porosity, superior mechanical properties, chloride ion penetration resistance and volume stability.
结论
（1）氢氧化钙和水泥作为钙相掺入体系能有效细化砂浆试件的孔结构，其中，水泥对孔结构的改善效果更显著，而亚硝酸钙作为钙相掺入体系会粗化砂浆试件的孔结构。当钙相为氢氧化钙或亚硝酸钙时，纳米氧化铝对孔结构的改善效果优于偏高岭土；当钙相为水泥时，偏高岭土对孔结构的改善效果优于纳米氧化铝。
（2）氢氧化钙作为钙相掺入体系明显缩短了砂浆的凝结时间，降低了流动度；亚硝酸钙作为钙相掺入体系延长了砂浆的凝结时间，略微降低了砂浆的流动度；水泥作为钙相掺入体系显著延长了砂浆凝结时间，提高了流动度。当钙相一定时，掺偏高岭土砂浆的凝结时间、流动度分别小于掺纳米氧化铝砂浆的凝结时间、流动度。
（3）三种钙相材料对砂浆力学性能改善效果的大小顺序为：水泥＞氢氧化钙＞亚硝酸钙，其中，水泥和氢氧化钙对砂浆的力学性能表现为增强作用，亚硝酸钙对砂浆的力学性能基本表现为削弱作用。当钙相为氢氧化钙或亚硝酸钙时，纳米氧化铝对砂浆力学性能的改善效果优于偏高岭土；当钙相为水泥时，偏高岭土对砂浆力学性能的改善效果优于纳米氧化铝。
（4）当铝相一定时，钙相对砂浆抗氯离子渗透性能、体积稳定性、干燥失水率改善效果的大小顺序为：水泥＞氢氧化钙＞亚硝酸钙。当钙相为氢氧化钙或亚硝酸钙时，纳米氧化铝对砂浆抗氯离子渗透性能、体积稳定性、干燥失水率的改善效果优于偏高岭土；当钙相为水泥时，偏高岭土对砂浆抗氯离子渗透性能、体积稳定性、干燥失水率的改善效果优于纳米氧化铝。
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引用本文
何雷军,郭浩宇,黄飞,等.钙、铝相协同作用对碱激发矿渣胶凝材料性能的影响[J].混凝土与水泥制品,2025(7):82-87.
HE L J,GUO H Y,HUANG F,et al.Effect of synergistic action of calcium and aluminum phases on the performance of alkali-activated slag cementitious materials[J].China Concrete and Cement Products,2025(7):82-87.
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