压力强度和成熟度的UHPC立方体和气瓶:新的转换系数和建议早期年龄质量控制
Mohammed S Ibrahim1,2, Mohamed A Moustafa3,2, Shahrukh Shoaib4
1McGill University, Montreal, Canada.
Scientific reports
|December 16, 2025
概括
本研究为在超高性能混凝土 (UHPC) 质量控制中使用立方体样本引入了新的转换因子. 这些因素使得可靠的早期强度评估,简化了现场测试.
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:
- 超高性能混凝土 (UHPC) 提供优越的压力强度 (>125 MPa) 和快速的早期强度增强 (1 天内80 MPa),非常适合加速施工.
- 目前美国UHPC的质量控制依赖于75毫米的气,需要耗时的准备,可能会影响早期的强度结果.
- 标准化和高效的现场质量控制方法对于确保UHPC符合设计规格至关重要.
研究的目的:
- 建立可靠的转换因子,用于在UHPC质量控制中使用立方体样本.
- 为了验证立方体的使用,以便对UHPC的早期压力强度进行准确的评估.
- 提供适用于各种HHPC混合物和测试条件的概括发现.
主要方法:
- 研究了五种UHPC类型和八种混合物,其钢纤维 (SF) 比例和立方体大小各不相同.
- 在各种固化条件下测试了大约900个标本,以覆盖7-140MPa的强度范围.
- 在早期和晚年分析压缩行为,并结合强度成熟度方法进行验证.
主要成果:
- 确定了立方体压力强度的新转换因子,特别是对于UHPC的早期测试.
- 量化了样品形状和尺寸对UHPC压力强度的影响.
- 通过强度成熟度分析验证了拟议的转换因子,证实了它们对早期质量控制的适用性.
结论:
- 立方体样本可以自信地用于UHPC质量控制,为气提供更实用的替代方案.
- 该研究建议采用强度成熟度方法以及新的转换因子,以有效地控制早期的超高压电路质量.
- 这些发现有助于立即实施改进的UHPC现场测试协议.
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