碳化固化对非线性超声响应和砂机械性能的影响的描述
Shruti Singh1, Hang Zeng1, Umar Amjad2
1Department of Civil and Architectural Engineering and Mechanics, The University of Arizona, Tucson, AZ 85721, USA.
Materials (Basel, Switzerland)
|March 14, 2026
概括
非线性超声波有效监测水泥碳化,将声信号与材料强度和二氧化碳吸收相关联. 这种非破坏性的方法有助于在水泥行业的碳捕获策略.
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.
- 环境科学 环境科学
背景情况:
- 水泥行业是全球二氧化碳排放的重要来源.
- 开发有效的碳捕获策略需要监测碳化过程中的材料性能.
- 现有的监测技术可能无法完全捕捉水泥水化和碳化过程的复杂性.
研究的目的:
- 为了研究水泥砂的加速碳化固化.
- 评估线性和非线性超声波传感,以监测这一过程.
- 为了将超声波反应与机械性能和二氧化碳吸收相关联.
主要方法:
- 水泥砂标本经历了加速碳化固化1-28天.
- 使用超声波脉冲速度 (UPV),非线性超声波响应 (SPC-I),压力强度和二氧化碳吸收的重力测量分析进行评估.
- 线性 (UPV) 和非线性 (SPC-I) 超声波方法对碳化诱导变化的敏感性进行比较.
主要成果:
- 非线性超声波传感 (SPC-I) 区分了碳化过程中的矩阵演变,与线性UPV不同.
- 早期碳化 (<7天) 由于微裂变增加了非线性;后期阶段随着固化年龄减少了SPC-I.
- 压力强度增加到38.9%,二氧化碳吸收平均为2.62%的质量增加,与SPC-I趋势相反相关.
结论:
- 非线性超声波传感为监测水泥碳化固化提供了一种敏感,非破坏性的方法.
- 来自非线性超声波的声学特征可以与机械性能和碳封存联系起来.
- 该技术通过评估基于水泥的应用中的材料性能来支持碳捕获策略.
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