通过可持续和耐盐水泥复合材料延长海上建筑的耐用性
Mohamed Heikal1, Mohamed A Ali2, Djamel Ghernaout3,4
1Chemistry Department, Faculty of Science, Benha University, Benha 13518, Egypt.
Materials (Basel, Switzerland)
|November 14, 2023
概括
使用地面颗粒高炉渣 (GGBFS) 的环保水泥混合物在腐蚀性海水中表现出极好的弹性. 与60%的GGBFS混合物在一年后保持了高压力强度,在海洋环境中表现出优越的耐用性.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 环境科学 环境科学
背景情况:
- 普通波特兰水泥 (OPC) 容易在海洋环境中降解.
- 地质颗粒高炉渣 (GGBFS) 为水泥材料提供了一个可持续的替代品.
- 评估混合水泥在腐蚀条件下的长期性能对于基础设施的耐用性至关重要.
研究的目的:
- 在模拟的海水环境中评估OPC-GGBFS水泥混合物的长期弹性.
- 调查海水暴露对GGBFS水泥糊的物理和化学性能的影响.
- 分析水化产品的变化及其在长时间海洋条件下的稳定性.
主要方法:
- 准备了各种GGBFS含量的水泥糊,并将其浸入海水中长达一年.
- 测量的属性包括自由含量 (FLC),化学组合水含量 (CWC),散装密度 (BD),总孔径 (φ),硫酸盐和含量以及压力强度 (CS).
- 使用先进的分析技术,如差异热分析 (DTA),FT-IR光谱和X射线衍射 (XRD) 来研究水化产品.
主要成果:
- 与对照样本相比,所有含有GGBFS的水泥糊都表现出对海水诱导的恶化有较强的抵抗力.
- 混凝土混凝土与60%重量GGBFS的混合物表现出了特殊的耐用性,在浸泡一年后达到85.7MPa的压力强度.
- 海水暴露导致水化产品的特定变化,但GGBFS混合物的整体结构完整性仍然很强.
结论:
- 纳入GGBFS显著提高了水泥材料在侵略性海水环境中的耐用性和长期弹性.
- 60%重量的GGBFS混合物是海上建筑应用中非常有前途的材料,需要优越的耐腐蚀性.
- 这项研究验证了GGBFS混合水泥在减轻海洋环境中化物和硫酸盐攻击的有害影响方面的有效性.
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