地质聚合物混凝土的残留性质用于火灾后结构的评估
Balamurali Kanagaraj1, Nammalvar Anand1, Diana Andrushia2
1Department of Civil Engineering, Karunya Institute of Technology and Sciences, Coimbatore 641114, India.
Materials (Basel, Switzerland)
|September 9, 2023
概括
优化地聚合物混凝土中的水与粘合剂比率,这些混凝土是由飞和渣等工业副产品制成的,提高了其强度和微观结构. 这种可持续材料显示了建筑的潜力,但需要考虑其防火性能.
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:
- 工业副产品,如飞 (FA) 和高炉砂 (GGBS),为建筑材料提供了可持续的替代品.
- 地质聚合物混凝土 (GPC) 使用这些副产品,提供了一种减少建筑行业碳足迹的方法.
- 活性混凝土标准,如印度标准,指导这些新型材料的开发.
研究的目的:
- 研究水与粘合剂 (W/B) 比率 (0.4-0.6) 的变化对地质聚合物混凝土性能的影响.
- 在不同的W/B比下评估GPC的残留性能和压力强度 (CS).
- 根据ISO 834标准火灾曲线,评估不同等级 (M10-M40) 和W/B比的GPC火灾后性能.
主要方法:
- 地质聚合物混凝土混合物是使用飞灰和GGBS设计的.
- 分析了W/B比率 (0.4,0.5,0.6) 对GPC特性的影响.
- 在GPC标本上进行了压力强度测试.
- 在暴露于模拟火灾条件后,评估了火灾后的残留特性 (ISO 834).
主要成果:
- 较低的W/B比率 (例如0.4) 导致GPC中更密集,更不多孔的微观结构.
- 高温导致GPC标本中的微观结构更加多孔.
- 火灾暴露后的质量损失在2.3-6.5%之间,W/B比为0.4和0.6.
- 强度损失随着W/B比率和火灾暴露时间的变化而显著变化,从36.81%到100%不等.
结论:
- 优化W/B比率对于提高地质聚合物混凝土的压力强度和微观结构至关重要.
- 地质聚合物混凝土显示出作为可持续建筑材料的潜力,但其在火灾条件下的性能需要仔细考虑.
- 对耐火性的进一步研究是必要的,以确保GPC在各种结构应用中的长期可行性.
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