关于珊瑚聚合物的静态机械性质和数值模拟的研究,海水混凝土与合理的混合比例的混凝土
Yuxuan Peng1, Liyuan Yu1,2, Wei Li1,3
1State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China.
Materials (Basel, Switzerland)
|May 25, 2024
概括
珊瑚聚合物海水喷混凝土 (CASS) 作为其主要机制表现出拉伸性故障,随着年龄的增长变得越来越脆. 最佳的混合设计和固化年龄影响其机械性能,与普通聚合物海水喷混凝土相比.
科学领域:
- 材料科学与工程 材料科学与工程
- 土木工程 土木工程是指土木工程.
- 建筑材料 建筑材料
背景情况:
- 冲击混凝土是一种广泛使用的建筑技术.
- 珊瑚聚合物在海洋建筑中提供了一个潜在的可持续替代品.
- 了解珊瑚聚合物海水射水混凝土 (CASS) 的机械行为对于其应用至关重要.
研究的目的:
- 为了确定珊瑚聚合物的最佳混合比例,海水喷 (CASS).
- 研究CASS在各种固化年龄下的静态机械特性.
- 在宏观和微观尺度上分析CASS的故障机制.
主要方法:
- 使用直角实验来找到最佳的混合比例.
- 在CASS标本上进行了近静态压缩和分裂测试.
- 采用了声辐射 (AE) 和数字图像相关性 (DIC) 技术.
- 进行粒子流代码 (PFC) 模拟以进行微量分析.
主要成果:
- 最佳的混合比例包括700公斤/立方米的水泥材料,0.45的水粘合比率,60%的沙子比率和8%的加速器.
- 拉伸性故障是压缩和分裂试验中的主要机制.
- 卡斯强度的发展最初更快,后来减速,随着时间的推移,脆弱性增加.
- 故障主要发生在水泥砂和砂-聚合物接口上.
结论:
- 最佳的混合比例为CASS应用提供了基础.
- 卡斯的早期强度相似,但后来的强度低于普通聚合物海水喷混凝土 (OASS).
- 珊瑚孔上的矿物填充效应影响了CASS的机械性能.
- 了解故障机制是提高CASS性能的关键.
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