在各种固化方案下对富化飞基水泥砂压缩进行比较分析
Wasim Abbass1, Soheeb Ullah Mahmood1, Ali Ahmed1
1Department of Civil Engineering, University of Engineering and Technology, Lahore, 54890, Pakistan.
Heliyon
|March 11, 2024
概括
飞灰水泥和砂复合 (FCBs) 为传统的烧土提供了一个可持续的替代方案. 优化的FCB表现出有前途的物理机械性能,使其适用于建筑.
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:
- 自公元前7000年以来,传统的烧土 (BCB) 已被使用.
- 工业废物,如煤炭飞灰 (CFA),为可持续建筑材料提供了机会.
- 开发对BCB的环保替代品对于减少环境影响至关重要.
研究的目的:
- 调查用飞灰水泥和砂复合 (FCB) 取代BCB的可行性.
- 通过改变CFA,普通波特兰水泥 (OPC),石灰尘 (SD) 和细砂含量来优化FCB性能.
- 在不同的固化条件下评估FCBs的物理机械性能.
主要方法:
- FCBs的实验生产和表征.
- 优化混合比例,包括CFA (50-70%),OPC (9-21%),SD和细砂.
- 使用X射线衍射 (XRD),能量分散X射线 (EDX) 和扫描电子显微镜 (SEM) 的材料分析.
- 在正常和蒸汽固化条件下的性能测试,按照ASTM C 67-05标准.
主要成果:
- 蒸汽固化显著提高FCBs的早期力量发展.
- 一个优化的混合物 (MD: 5S) 实现了15.57 MPa的压力强度和0.67 MPa的屈曲强度.
- 优化的FCB表现出20.08%的吸水率和每30英寸的4.64g/分钟的初始吸水率,没有花朵.
- 9%的OPC和50%的CFA (MD: 1S) 混合物显示了早期强度的改善 (28天后4.95MPa).
- 高CFA含量 (70%) 与低水泥负面影响了性能.
结论:
- FCB是传统BCB的可持续和经济可行的替代方案.
- 优化的FCB配方可以满足所需的建筑材料标准.
- 在FCB中利用CFA等工业废物有助于建设中的循环经济.
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