通过在可持续混凝土中使用大米灰来减轻环境影响:实验研究,数值建模和优化
Md Jihad Miah1, Mohammad Shamim Miah2, Humera Mughal3
1Civil Engineering, School of Architecture, Technology and Engineering, University of Brighton, Lewes Road, Brighton BN2 4GJ, UK.
Materials (Basel, Switzerland)
|July 30, 2025
概括
本研究探讨使用大米灰 (RHA) 代替普通波特兰水泥 (OPC) 在混凝土中. 结果显示,RHA提高了混凝土的性能,减少了二氧化碳排放,促进了可持续的建筑实践.
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:
- 水泥生产是二氧化碳排放的主要来源,有助于全球变暖和空气污染.
- 与普通波特兰水泥 (OPC) 相比,可持续的替代品对于减轻环境影响至关重要.
研究的目的:
- 为了研究混凝土的新鲜和硬化特性,使用大米灰 (RHA) 作为部分替代OPC.
- 开发和验证基于数据的模型,用于预测RHA的具体性能.
- 评估RHA在减少二氧化碳排放和促进可持续混凝土生产方面的潜力.
主要方法:
- 混凝土混合物准备使用0%,5%和10%的RHA替代OPC.
- 在各种固化年龄 (14-120天) 中评估了新鲜性质 (沉降,温度) 和硬化性质 (压力强度,应力应变).
- 基于数据的模型被开发,验证和优化,以预测具体的行为.
主要成果:
- 增加的RHA含量导致更高的低沉和更低的新鲜混凝土温度.
- 压力-应变概况显示起初的斜率下降,经过28天的固化后得到改善,特别是5%的RHA.
- 压缩强度随着RHA百分比较高而略有下降,但在较长的固化年龄下降至最低 (90%的RHA在90天内减少8%).
- 基于数据的模型准确地预测了应力-应变形状和压力强度 (R2 ≈ 0.9950-0.9993).
结论:
- 米灰可以有效地用作混凝土中OPC的部分替代品.
- 10%的RHA替代显示出可持续混凝土生产的潜力,在晚年降低最小的强度.
- 开发的基于数据的模型准确地预测了混凝土的性能,支持在建筑中使用RHA.
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