在改造混凝土中探测机械属性和微观结构的联系,并将其与回收和草粉混合
1College of Civil Engineering and Transportation, Northeast Forestry University, Harbin, 150040, China. yongchengji@126.com.
Scientific reports
|March 11, 2025
概括
将颗粒和粉添加到混凝土中会降低压力强度. 一个新的构成模型准确地预测了这种改性混凝土的机械性能.
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:
- 研究混凝土复合材料的机械性能对于开发可持续建筑材料至关重要.
- 了解回收材料 (如颗粒) 和农业副产品 (如混凝土中的草粉) 之间的相互作用至关重要.
研究的目的:
- 分析颗粒和粉,有或没有KH570修改的联剂,对混凝土的压力强度的影响.
- 开发和验证一个单轴压力损伤构成模型,用于修改的回收-粉混凝土.
- 利用有限元分析 (FEA) 预测这些新型混凝土添加剂的机械行为.
主要方法:
- 对混凝土混合物进行了比较的压力强度测试,其中颗粒 (10%,20%,30%) 和草粉的体积分数各不相同.
- 一个单轴压力损伤构成模型是从实验压力-应变曲线中得出的.
- 使用ABAQUS FEA软件进行了数值模拟,以验证拟议的模型并预测混凝土的特性.
主要成果:
- 增加的颗粒含量导致压力强度显著下降:在10%时15.4%,在20%时26.6%,在30%体积分数时39.7%.
- 加上草粉也对混凝土的压力强度产生了负面影响.
- 拟议的构成模型与经过修改的回收草粉混凝土的实验数据有很好的一致性.
结论:
- 颗粒和草粉都会对混凝土的压力强度产生不利影响,而的压力强度会显著下降.
- 开发的单轴压力损伤构成模型为预测这种复合混凝土的机械性能提供了可靠的工具.
- 使用经过验证的模型进行的FEA模拟可以帮助优化改性回收-粉混凝土的混合设计.
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