海工高性能混凝土耐久性研究

采用双掺矿物掺合料和复合使用化学外加剂的技术手段配制出系列海工高性能混凝土,并对比分析海工高性能混凝土和普通混凝土的性能差异,结果表明:海工高性能混凝土氯离子扩散系数同比普通混凝土降低一个数量级;经历200次冻融循环后其质量基本无损失,抗压强度比仍高达90%以上。同时,采用Fick模型对混凝土结构进行寿命预测,达到80年以上安全使用寿命的耐久性技术要求。

Research on Durability of Marine High Performance Concrete

A series of marine high perfor-mance concretes are prepared by using compound mineral admixture and chemical additives,comparatively analyzing the difference between the marine high perfor-mance concretes and the ordinary concretes,the results show that:chloride ion diffusion coefficient of the marine high performance concretes reduce a number magnitude at the same condition.After experiencing 200 thaw-freeze cycles,the marine high performance concretes quality doesn't loss basically,and the compressive str...