使用超声波速度方法预测非化Hwangto替代混凝土的强度
Hajun Im1, Wonchang Kim1, Hyeonggil Choi2
1Department of Fire and Disaster Prevention, Semyung University, Jecheon 27136, Republic of Korea.
Materials (Basel, Switzerland)
|January 11, 2024
概括
本研究探讨使用非烧结的Hwangto (NSH) 作为混凝土中的水泥替代品. 确定了最佳的NSH混凝土性能,其中15%的替换与普通混凝土的偏差最小,并开发了压力强度的预测模型.
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
- 可持续建筑 可持续建筑
背景情况:
- 传统的混凝土生产对环境产生了重大影响.
- 探索替代,本地采购的材料,如非烧结的Hwangto (NSH) 对于可持续建筑至关重要.
- 了解NSH改性混凝土的机械性能对于其实际应用至关重要.
研究的目的:
- 研究混凝土的特性,将非烧结Hwangto (NSH) 作为部分水泥替代品.
- 为了确定混凝土混合物的NSH的最佳水泥替换比率.
- 为NSH混凝土 (NSHC) 的压力强度开发一个预测模型.
主要方法:
- 准备的混凝土混合物具有不同的NSH替换率 (0%,15%,30%,45%) 和水与粘合剂比率 (0.41,0.33,0.28).
- 评估了机械性能,包括单位重量,压力强度,超声波脉冲速度 (UPV) 和应力-应变行为.
- 使用扫描电子显微镜 (SEM) 和X射线衍射 (XRD) 进行了微结构分析.
- 使用回归分析开发基于UPV的压力强度预测模型.
主要成果:
- 增加NSH替代导致单位重量 (5.35%),压力强度 (35.62%) 和UPV (6.34%) 的减少.
- 与普通混凝土相比,15%的NSH替换率在性能上表现出最小的偏差.
- SEM揭示了具有更高NSH含量的无形结构和毛孔的增加,而XRD显示了高高的高和石峰值.
- 使用指数函数开发了一个压力强度预测模型,平均误差为<10%.
结论:
- 非烧结的Hwangto可以作为混凝土中的部分水泥替代品,其中15%的替代品是保持机械性能的最佳选择.
- 由于加入NSH而产生的微观结构变化会影响混凝土的强度和耐用性.
- 开发的预测模型提供了一种可靠的方法来估计NSH混凝土的压力强度,特别是在较低的强度范围内.
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