混合煤混凝土混凝土的机械性能和弹性模块预测
Xipeng Qin1,2, Zhengyi Xu3, Mingyu Liu2
1School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China.
Materials (Basel, Switzerland)
|March 27, 2025
概括
使用煤作为混凝土中的粗聚合物会降低其强度和弹性模量,更高的替换率会导致更大的减少. 为这种工业废料开发了一种弹性模块的预测模型.
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.
- 废物管理 废物管理
背景情况:
- 煤炭是一种主要的工业废物,全球储量很大.
- 迫切需要有效利用煤炭的资源.
- 在混凝土中用煤取代粗聚合物带来了技术挑战.
研究的目的:
- 为了研究混凝土的机械性能,使用混合的煤聚合物.
- 为了确定总替换比率和混凝土强度等级对性能的影响.
- 开发一个可预测的模型,用于煤混凝土的弹性模量.
主要方法:
- 混合煤聚合物 (SCGA和RCGA) 用于取代粗聚合物.
- 测试了各种强度 (C20-C50) 和替换比率 (0-100%) 的混凝土样本.
- 分析了机械行为,压力强度和弹性模量.
- 开发了回归和预测模型.
主要成果:
- 随着越来越多的煤聚合物替代,混凝土的弹性模量和压力强度显著下降.
- 在100%的更换时,C30混凝土的弹性模量和压力强度分别降低了3.5%和11.3%.
- 较高强度等级的减少更为明显 (例如,C50混凝土减少了10%和35%).
- 制定了与压力和轴向压力强度相关的回归方程.
- 弹性模块的预测模型显示了改进的准确性.
结论:
- 煤可以作为混凝土中粗聚合物的部分或全部替代品,但存在性能权衡.
- 该研究提供了一种方法来预测含有煤炭的混凝土的弹性模量.
- 开发的模型有助于理解和利用建筑材料中的煤.
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