波佐兰酸添加剂对甲烯基混凝土的强度和微观结构的影响
Manisha Bansal1, Manjeet Bansal1, Alireza Bahrami2
1Civil Engineering Department, M.R.S.P.T.U, Bathinda (Punjab), India.
PloS one
|April 10, 2024
概括
与微 (MS) 或纳米 (NS) 结合的甲基 (MK) 增强了混凝土的强度和耐用性. 这些pozzolans创建一个更密集的矩阵,提高性能和硫酸盐抵抗在水泥结构.
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.
- 建筑材料 建筑材料
背景情况:
- 普通波特兰水泥 (OPC) 是一种主要的建筑材料.
- 提高混凝土的物理性能和长期性能对于基础设施发展至关重要.
- 为了改善混凝土,正在探索补充的水泥材料,如甲 (MK),微 (MS) 和纳米 (NS).
研究的目的:
- 为了研究混凝土的物理性能和长期性能,使用金属 (MK) 作为粘合剂.
- 评估混凝土混合物中用微 (MS) 和纳米 (NS) 代替普通波特兰水泥 (OPC) 的效果.
- 为了确定MS (5-15%) 和NS (0.5-1.5%) 与MK结合的最佳剂量.
主要方法:
- 准备混凝土混合物,其不同百分比的MK,MS和NS取代OPC.
- 评估水泥糊的性能:硬化加速,减少流动性,一致性和定时间.
- 使用扫描电子显微镜 (SEM) 和X射线衍射 (XRD) 确认矩阵密度的微结构分析.
- 在28天后对压力强度进行机械测试.
- 耐用性测试,包括吸水和抗硫酸盐攻击的耐用性.
主要成果:
- 加入MK,MS和NS加速了水泥的硬化,降低了加工能力.
- 微结构分析揭示了一个更密集的混凝土矩阵.
- 压力强度在28天后增加了MS的10.37%,NS的11.48%.
- 吸水率降低了高达35.82%,硫酸盐的抗攻击性提高了1%的NS和10%的MK.
结论:
- 纳米二氧化 (NS) 与甲 (MK) 结合,有效地产生具有优越强度的水泥结构.
- NS和MK的组合显著提高了混凝土的耐用性,通过减少水的透和改善的硫酸盐抵抗力来证明这一点.
- 这些pozzolanic材料为先进混凝土提供了可行的途径,具有改进的机械性能和长期性能特征.
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