对聚烯纤维钢筋混凝土的轴向拉伸性能进行实验研究
Xutao Zhang1, Ruijie Yin2, Yunjuan Chen3
1School of Architecture and Engineering, Liaocheng University, Liaocheng, 252059, China. zhangxutao@lcu.edu.cn.
Scientific reports
|September 29, 2023
概括
将聚烯纤维添加到混凝土中,可以显著提高其轴向拉伸强度,并改善高峰后的拉伸行为. 该研究开发了一种新设备来准确测量这些特性,发现最大拉伸强度的最佳纤维含量为0.9kg/m3.
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.
- 混凝土技术 混凝土技术
背景情况:
- 传统的混凝土在拉伸应力下表现出脆弱的行为.
- 聚烯纤维正在研究其提高混凝土机械性能的潜力.
- 精确测量拉伸性能对于结构设计至关重要.
研究的目的:
- 开发和验证一种用于精确测试混凝土轴向拉伸力的新型装置.
- 研究聚烯纤维含量对混凝土拉伸性能的影响.
- 为了确定最佳的聚烯纤维含量,以提高拉伸性能.
主要方法:
- 开发了一种具有刚性框架,球形链和拉机的专用轴向拉力测试装置.
- 制造具有不同聚烯纤维含量的混凝土样品.
- 进行轴向拉伸试验,以测量应力-拉伸曲线,拉伸强度和峰值拉伸.
- 与分裂拉伸试验进行比较,以验证新设备的适用性.
主要成果:
- 开发的设备准确地测量了抗拉强度,峰值应变和峰值后行为,克服了离心率问题.
- 添加聚烯纤维增强了混凝土的抗拉强度,并引入了塑料特性.
- 拉伸强度最初随着纤维含量增加而增加,然后减少,最大强度为0.9 kg/m3.
- 固化年龄也影响了聚烯纤维混凝土的拉伸性能.
结论:
- 新的轴向拉伸试验装置有效用于评估聚烯纤维钢筋混凝土.
- 聚烯纤维可以显著提高混凝土的拉力性能.
- 0.9公斤/立方米的最佳聚烯纤维含量最大限度地提高了拉伸强度,提高了混凝土的柔性.
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