基于性能设计的铁渣性活性混凝土用于高热负荷应用
Andres Arce1, Anastasija Komkova2, Catherine G Papanicolaou1
1Department of Civil Engineering, University of Patras, GR-26504 Patras, Greece.
Materials (Basel, Switzerland)
|October 16, 2024
概括
这项研究优化了铁渣性活性混凝土适应高温,实现高强度和降低二氧化碳排放. 开发的混凝土为苛刻的建筑应用提供了一个可持续的替代方案.
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) 混凝土生产对环境产生重大影响.
- 活性混凝土 (AAC) 提供了一个可持续的替代品,但混合物设计标准缺乏,特别是铁渣 (FNS).
- 高温应用需要具有增强热稳定性和机械完整性的混凝土.
研究的目的:
- 用铁渣 (FNS) 开发优化的活性混凝土,用于高温应用.
- 尽量减少对环境的影响,同时实现高压力强度和可加工性.
- 为了评估FNS-AAC在高温暴露后的性能.
主要方法:
- 使用响应表面方法 (RSM) 和实验混合物设计来优化FNS-AAC.
- 优化了五个组件 (水,基于FNS的粘合剂,三种聚合物尺寸).
- 在暴露于600°C之前和之后,测试了压力强度和落.
主要成果:
- 最佳的FNS-AAC混合物在未加热的情况下达到88MPa,在加热后达到34MPa的强度 (140毫米的低落).
- 升级混合物显示可加工性得到改善 (210毫米沉降),但加热后强度降低 (23.5MPa).
- 将石灰岩替换为橄烯聚合物提高了加热后的强度 (32 MPa).
- 生命周期分析表明,与OPC混凝土相比,二氧化碳排放量降低了77%.
结论:
- 实验的混合设计是FNS-AAC的可行的基于性能的方法.
- 开发的FNS-AAC是一种有前途的环保材料,用于高强度,高温建筑.
- 这种方法促进了AAC在缺乏规范性标准的建筑中的应用.
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