腐蚀环境下活性粉末对混凝土自愈性能影响研究

徐沛保; 骆文杰; 纪晓峰

文章摘要

徐沛保,骆文杰,纪晓峰.腐蚀环境下活性粉末对混凝土自愈性能影响研究[J].安徽建筑大学学报,2026,34(3):48-56

腐蚀环境下活性粉末对混凝土自愈性能影响研究

Study on the Influence of Active Powder on the Self-healing Performance of Concrete in Corrosive Environment

DOI：

中文关键词: 活性化学粉末腐蚀环境抗压与劈裂强度强度恢复率愈合机理

英文关键词: active chemical powder corrosive environment compressive and splitting strength strength recovery rate healingmechanism

基金项目:安徽省自然科学基金青年项目（2008085QA50）；安徽建筑大学技术开发横向项目（HYB20240205）

作者	单位
徐沛保	College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China
骆文杰	College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China
纪晓峰	College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China

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中文摘要:

腐蚀环境对含活性化学粉末混凝土的自愈性能具有显著影响。为获得适用于不同腐蚀环境的自愈混凝土最佳配方，以活性粉末络合剂（甲基硅酸钠与葡萄糖酸钠按2:1比例）、助剂（硅酸铝与硫酸钠按1:1比例）、甲酸钙和碳酸钠为原料，开展三种环境下的正交实验。通过测试抗压强度、劈裂强度、强度恢复率等参数，评估混凝土的自愈效果，并分析活性化学粉末在不同腐蚀环境下的作用规律。实验结果表明，腐蚀性离子侵蚀会造成裂缝扩展，加剧混凝土开裂，降低其力学强度；活性化学粉末可促进水泥水化反应，优化混凝土内部结晶体分布，进而提高自愈能力。成分分析与微观结构观测结果显示，活性粉末能与混凝土内的氢氧化钙、游离钙离子等物质发生反应，生成硅酸钙凝胶、钙矾石晶体及碳酸钙沉淀，并在裂纹处积聚，起到裂纹修补、强度提升和损伤修复的作用。

英文摘要:

Corrosive environments significantly influence the self-healing performance of concrete incorporating active chemical powders. To determine the optimal formulation of self-healing concrete suitable for different corrosive conditions, orthogonal experiments were conducted in three types of environments using an active powder complexing agent（sodium methyl silicate and sodium gluconate in a 2:1 ratio）, an auxiliary agent（aluminum silicate and sodium sulfate in a 1:1 ratio）, calcium formate, and sodium carbonate. The selfhealing efficiency of concrete was evaluated by measuring compressive strength, splitting strength, and strength recovery rate, and the behavior of active chemical powders under different corrosive conditions was analyzed. Experimental results indicate that the ingress of corrosive ions leads to crack enlargement, further exacerbating concrete cracking and reducing its strength. The active chemical powders promote cement hydration and improve the distribution of crystalline products within the concrete, thereby enhancing its self-healing capacity. Compositional analysis and microstructural observation reveal that the active powders react with calcium hydroxide and free calcium ions in concrete to form calcium silicate hydrate（C-S-H）gel, ettringite crystals, and calcium carbonate precipitates. These products accumulate within cracks, contributing to crack repair, strength enhancement, and damage restoration.

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