根据非统一的ITZ模型预测化飞灰混凝土的弹性模块
Xiaoping Zhao1, Misha Zhan2,3, Zhiwei Chen4
1Architectural Engineering College, Jinhua University of Vocational Technology, Jinhua 321016, China.
Materials (Basel, Switzerland)
|August 28, 2025
概括
这项研究开发了飞灰混凝土在浸后弹性模块的预测模型,以提高耐用性评估. 研究结果显示,飞灰提高了液阻力,弹性模和液程度之间存在线性相关性.
科学领域:
- 材料科学与工程
- 土木工程
- 混凝土技术
背景情况:
- 在混凝土中加入飞灰具有显著的环境和经济效益,包括减少水泥使用,降低二氧化碳排放,提高耐用性.
- 飞灰混凝土弹性模块的预测模型存在关键差距,阻碍了耐久性评估.
- 浸出可以降低混凝土的性能,需要准确的模型来预测随着时间的推移性能.
研究的目的:
- 开发一种理论和实验方法,用于预测浸后飞灰混凝土的弹性模量.
- 调查飞灰含量,水结合比 (w/b),总体体积分 (fa) 和接口过渡区 (ITZ) 厚度对弹性模量的影响.
- 确定弹性模和泄漏的程度之间的相关性.
主要方法:
- 基于水化反应的氧化和酸含量的定量计算,以确定浸出后的多孔性.
- 应用双相复合球体理论和非均的ITZ模型来构建弹性模量预测方法.
- 实验性调查以验证预测模型并研究随时间的浸出深度,范围和弹性模量变化.
主要成果:
- 开发的预测方法准确地模拟了经实验数据验证的干混凝土的弹性模量.
- 适当的飞灰含量可以提高混凝土的水抵抗力.
- 较低的 w/b,较薄的 ITZ 和较高的聚合物体积分数显著增加了水混凝土的弹性模量.
结论:
- 这项研究提供了经过验证的飞灰混凝土弹性模块模型,考虑了关键参数.
- 飞含量在提高混凝土对泄漏的抵抗力方面发挥着至关重要的作用.
- 这些发现为在需要高耐久性的工程应用中理解和应用矿物混凝土提供了理论基础.
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