在硫酸盐干湿循环下对甲二烯回收混凝土的耐久性分析
Chuheng Zhong1,2,3, Dongping Wang4, Lijuan Zhang1
1School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China.
Scientific reports
|July 16, 2024
概括
这项研究提高了回收精细聚合物混凝土 (RFAC) 耐硫酸盐攻击和湿干循环的耐久性,使用生物甲 (MK) 和飞灰 (FA). 通过15%的MK和60%的回收精细聚合物 (RFA) 替换,实现了最佳性能.
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.
- 环境科学 环境科学
背景情况:
- 回收精细聚合物混凝土 (RFAC) 面临着耐久性挑战,特别是在联合硫酸盐攻击和湿干循环下.
- 提高RFAC的可持续性和成本效益对于建筑行业至关重要.
研究的目的:
- 为了研究RFAC在混合湿干循环和硫酸盐侵蚀下的耐用性.
- 评估生物甲 (MK) 和飞灰 (FA) 添加剂对RFAC性能的影响.
- 为了确定回收精细聚合物 (RFA) 的最佳替代水平,以提高混凝土的性能.
主要方法:
- 在5%的硫酸盐侵蚀环境下,对RFAC进行了干湿循环测试,使用不同的MK和FA添加剂.
- 回收精细聚合物 (RFA) 的替代水平为0%,30%,60%和90%.
- 测量了质量损失,立方压力和相对动态模量;使用韦布尔函数进行损伤建模和寿命预测.
主要成果:
- 最佳的混凝土立方压力强度和相对动态模量在15%的MK生物剂量和60%的RFA替代下观察到.
- 优化RFAC的最大使用寿命预计在5%硫酸盐干湿循环下约为578个循环.
- 韦布尔函数模型准确地预测了混凝土的损坏寿命.
结论:
- 将MK和FA纳入RFAC提供了一种新的方法来提高硫酸盐丰富的循环环境中的耐用性.
- 该研究表明,在RFAC中使用MK和FA用于可持续和耐用建筑材料的实际潜力.
- 研究结果为开发环保建筑材料提供了宝贵的见解,解决了建筑行业的可持续性目标.
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