使用超硫化水泥的工程水泥复合材料:机械,物理和耐久性性能
Shahin Zokaei1, Hocine Siad1, Mohamed Lachemi1
1Department of Civil Engineering, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada.
Materials (Basel, Switzerland)
|May 25, 2024
概括
超硫酸盐水泥 (SSC) 在工程水泥复合材料 (ECC) 中提供了一个可持续的替代品,与普通波特兰水泥 (OPC) 的性能相匹配. 基于SSC的ECC显示出出色的机械性能和减少收缩,适用于各种工程应用.
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.
- 可持续建筑 可持续建筑
背景情况:
- 普通波特兰水泥 (OPC) 生产对环境有重大影响.
- 工程混凝土复合材料 (ECC) 提供增强的柔性,但通常依赖于OPC.
- 在高性能水泥材料中需要可持续的粘合剂.
研究的目的:
- 研究使用超硫酸盐水泥 (SSC) 作为ECC中的可持续粘合剂的可行性.
- 评估ECC的性能,包括带有和没有飞灰 (FA) 的SSC.
- 为了比较基于SSC的ECC与基于OPC的传统ECC的机械性能,耐用性和收缩.
主要方法:
- 使用SSC制备ECC混合物,使用不同的飞灰 (FA) 与SSC比率 (0至1.5).
- 机械性能的全面测试:压力强度,屈曲强度和柔性.
- 耐用性和物理性质评估:超声波脉冲速度,快速化物透性和干燥收缩.
- 使用扫描电子显微镜 (SEM) 进行微结构分析,使用能量分散X射线 (EDX) 和X射线衍射 (XRD).
主要成果:
- 带有SSC的ECC与基于OPC的ECC表现出类似的压力和屈曲强度.
- 所有基于SSC的ECC都符合工程应用标准,特别是在FA/SSC比率为0和0.8.8的情况下.
- 具有FA/SSC比率为1.2和1.5的ECC表现出超柔性性能,超过了控制.
- 与基于OPC的ECC相比,基于SSC的ECC,特别是带有飞灰的ECC,显示干燥收缩率较低.
结论:
- 超硫酸盐水泥 (SSC) 是一种可行和可持续的替代粘合剂,用于工程水泥复合材料 (ECC).
- 基于SSC的ECC提供了机械强度,增强的柔性和更好的耐久性的有希望的平衡.
- 加入飞灰进一步优化了基于SSC的ECC的性能,特别是在延展性和减少收缩方面.
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