混凝土核心样本的压力强度测试,添加回收聚合物
Jacek Szpetulski1, Grzegorz Sadowski1, Bohdan Stawiski2
1Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 17 Łukasiewicza St., 09-400 Płock, Poland.
Materials (Basel, Switzerland)
|June 13, 2025
概括
混凝土元素的压力强度因层层而异,尤其是在循环聚合物中. 核心样本测试揭示了从顶部到底部的强度差异,这对于评估结构完整性和开发转换因子至关重要.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 结构健康监测 结构健康监测
背景情况:
- 由于生态问题,回收聚合混凝土越来越多地被使用.
- 评估使用回收聚合物的混凝土元素的结构完整性至关重要.
- 关于使用回收聚合物的混凝土元素内的压力强度变化存在有限的研究.
研究的目的:
- 为了研究混凝土元素厚度的压力强度变化.
- 确定各种尺寸和层的核心样本的转换系数.
- 为了比较循环聚合混凝土与天然聚合混凝土的强度.
主要方法:
- 不同直径的核心样本 (59毫米,74.5毫米,114毫米) 从混凝土元素的顶部,中间和底部层 (260毫米厚) 中提取出来.
- 在这些核心样本上进行了压力强度测试.
- 结果与标准的94毫米核心样本和150毫米立方样本进行了比较.
主要成果:
- 与底层相比,在顶层观察到显著的压力强度下降,特别是在低强度混凝土 (20MPa) 与回收聚合物的混凝土中 (降低高达33%).
- 使用回收聚合物的压力强度为40MPa的混凝土在顶层的强度下降了17%.
- 对于使用纯天然聚合物的混凝土,也发现了类似的趋势.
结论:
- 压力强度在混凝土元素的厚度上不均,受聚合物类型和混凝土强度的影响.
- 开发的转换系数可以标准化核心样本强度数据,以进行准确的结构评估.
- 这些发现适用于质量控制,损害评估,重建和混凝土结构的火灾后评估.
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