关于USP热混合青及其混合物的耐裂性研究
Weipeng Shi1, Wenjing Kuang1, Tianqing Ling2
1School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, China.
Scientific reports
|December 1, 2025
概括
这项研究表明,热混合添加剂提高了化青的性能,提高了低温裂抵抗力,降低了建筑温度. 添加剂USPA-C2在热混合化青混凝土中表现出优异的结果.
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.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 改性青 (AR) 面临着高混合温度,粘度和低温裂纹的挑战.
- 开发可持续和高效的青技术对于基础设施的寿命和环境保护至关重要.
研究的目的:
- 评估一项新的国内USP热混合技术的性能,用于化青.
- 评估USPA-R和USPA-C2添加剂对青混凝土 (AC) 和石头青 (SMA) 混合物的性能和低温破裂阻力的影响.
- 阐明热混合添加剂对青粘合剂性能和性能的潜在机制.
主要方法:
- 用AC-13和SMA-13等级的USPA-R和USPA-C2添加剂制备热混合青.
- 综合性测试包括透,软化点,柔性,粘度,曲束体质计 (BBR),直接张力测试 (DDT),光分析和三点曲测试.
- 使用ABAQUS模拟来分析机制和量化性能反应.
主要成果:
- 无论是USPA-R还是USPA-C2,都提高了交流电的常规性能和低温变形阻力,USPA-C2的性能更好.
- 在三点曲试验中,AC-13混合物通常表现优于SMA-13.
- 与AC-R (≈142 με) 相比,USPA-C2显著增加了AC-13 (≈252 με) 的最大曲应变.
- 加入玄武岩纤维进一步增强了抗裂性能,特别是在-10°C下 (改善了约16.8%).
- 热混合剂被发现可以增强粘合剂的移动性和能量消耗.
结论:
- 评估的USP热混合技术有效地提高了化青的低温裂纹阻力.
- USPA-C2显示出优越的性能,作为一个热混合添加剂,用于化青.
- 降低建筑温度可以延长使用寿命,降低固化需求,节省能源,符合绿色建筑原则.
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