聚烯-玻璃纤维增强沙漠砂混凝土的机械性能和微观结构
Lina Hou1, Baojun Wen2, Wei Huang3
1College of Architecture Engineering, Xi'an Technological University, Xi'an 710021, China.
Polymers
|December 23, 2023
概括
将聚烯纤维 (PF) 和玻璃纤维 (GF) 添加到沙漠沙混凝土 (DSC) 中,可以显著提高其机械性能. 混合纤维钢筋显著提高了屈曲强度,降低了孔隙性,优化了混凝土的性能.
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
- 建筑材料 建筑材料
背景情况:
- 由于沙漠沙子的特性,沙漠沙子对混凝土生产构成挑战.
- 使用当地沙漠沙子提高混凝土的机械性能对于可持续建筑至关重要.
研究的目的:
- 通过结合聚烯纤维 (PF) 和玻璃纤维 (GF) 来提高沙漠沙混凝土 (DSC) 的性能.
- 研究不同纤维类型和体积分数对DSC的机械性质和微观结构的影响.
主要方法:
- 沙漠沙混凝土 (DSC) 的制备,其PF和GF含量各不相同.
- 测试基本机械性能:立方体的压力,拉力和曲强度.
- 使用注入法 (MIP) 和扫描电子显微镜 (SEM) 分析孔隙结构和接口结构.
主要成果:
- 添加纤维减少了DSC的低迷,玻璃纤维增强DSC (GFRDSC) 的低迷率低于聚烯纤维增强DSC (PFRDSC).
- 增强强度的顺序是曲性 > 分裂拉伸性 > 压力强度. 混合纤维增强DSC (HyFRDSC) 的曲强度增加了40.7%.
- 在HyFRDSC中,孔隙性减少了50.01%,纤维细化了大孔径,创造了更密集的微观结构.
结论:
- PF和GF都有效地提高了DSC的机械性能和性.
- 混合纤维增强提供了协同效应的好处,导致强度和耐久性的显著改善.
- 微结构分析证实,纤维增强了界面过渡区,有助于改善宏观机械性能.
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