碳化试验和钢纤维回收混凝土的直角多项式回归分析
Yahong Ding1, Zhongcai Lin1, Chunling Yan1,2,3
1School of Civil Engineering, Henan Polytechnic University, Jiaozuo, 455000, China.
Heliyon
|December 17, 2024
概括
添加1%的钢纤维 (SF) 显著提高了回收混凝土的碳化阻力. 较低的水-水泥比率和50%的再生原料聚合物 (RCA) 替代率也提高了耐用性.
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.
- 混凝土技术 混凝土技术
背景情况:
- 再利用混凝土通常与传统混凝土相比具有较低的耐用性.
- 碳化是影响混凝土结构完整性和使用寿命的关键降解过程.
- 提高回收混凝土的碳化阻力对于可持续建筑至关重要.
研究的目的:
- 调查影响钢纤维增强回收混凝土碳化抵抗的因素.
- 为了确定SF和再生原油聚合物 (RCA) 的最佳含量,以提高耐用性.
- 根据主要混合物设计参数,开发碳化深度的预测模型.
主要方法:
- 采用一个直角数组 (L) (16),用于系统测试的实验设计.
- 评估了钢纤维体积比,混凝土年龄 (T),水-水泥比 (W/R) 和RCA更换率的影响.
- 采用直角多项式回归分析来建立碳化深度的预测方程.
主要成果:
- 碳化深度随着混凝土的老化而增加,但由于较低的W/R比率而减少.
- 50%的RCA替换率在减少碳化深度方面表现出卓越的性能.
- 1%的SF含量与其他SF比率相比,碳化深度降低最为显著 (高达9.3%).
结论:
- 加入1%的钢纤维在提高回收混凝土的碳化抵抗方面是非常有效的.
- 优化W/R比率和RCA更换率对于提高回收混凝土的耐用性至关重要.
- 开发的回归方程为预测和优化混凝土碳化抵抗提供了有价值的工具.
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