基于超声检测的再生混凝土声学参数研究_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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基于超声检测的再生混凝土声学参数研究

Study on acoustic parameters of recycled concrete based on ultrasonic testing

2024年第4期

再生混凝土；再生粗骨料；力学指标；超声检测；声学参数

Recycled concrete; Recycled coarse aggregate; Mechanical index; Ultrasonic testing; Acoustic parameter

2024年第4期

10.19761/j.1000-4637.2024.04.082.05

贵州建研科技集团有限公司科技创新项目（建研科基2022-01号）。

郭广1，周理1，2，*，王帮康1

1.贵州大学建筑与城市规划学院，贵州贵阳 550003；2.贵州省山地人居智慧与绿色建造工程研究中心，贵州贵阳 550001

郭广1，周理1，2，*，王帮康1

郭广,周理,王帮康.基于超声检测的再生混凝土声学参数研究[J].混凝土与水泥制品,2024(4):82-86.

GUO G,ZHOU L,WANG B K.Study on acoustic parameters of recycled concrete based on ultrasonic testing[J].China Concrete and Cement Products,2024(4):82-86.

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1000

摘要：制作了5组不同再生粗骨料取代率（0、25%、50%、75%、100%）的试件，测试了其轴心抗压强度、弹性模量及破坏前后的声学参数，分析了再生粗骨料取代率、力学指标与声学参数之间的关系。结果表明：随着再生粗骨料取代率的增加，试件的轴心抗压强度呈先波动上升后下降的趋势，弹性模量呈下降趋势；在试件破坏前，试件的首波声速、首波幅值和主频值的数据离散性较小；在试件破坏后，各项声学参数较破坏前均下降，且数据离散性变大；首波声速和均方根振幅与弹性模量的相关性较好。 Abstract: Five sets of specimens with different replacement rates of recycled coarse aggregates (0, 25%, 50%, 75%, 100%) were made, and their axial compressive strength, elastic modulus, and acoustic parameters before and after failure were tested. The relationships between the replacement rate of recycled coarse aggregates, mechanical indicators, and acoustic parameters were analyzed. The results show that as the replacement rate of recycled coarse aggregate increases, the axial compressive strength of the specimens shows a fluctuating upward trend and then a decreasing trend, while the elastic modulus shows a decreasing trend. Before the failure of the specimen, the data discreteness of the head wave sound velocity, head wave amplitude, and dominant frequency value of the specimen is relatively small. After the failure of the specimen, all acoustic parameters decrease compared to before the failure, and the data discreteness increases. The correlation between the head wave sound velocity and root mean square amplitude have a good correlation with the elastic modulus.

英文名 : Study on acoustic parameters of recycled concrete based on ultrasonic testing

刊期 : 2024年第4期

关键词 : 再生混凝土；再生粗骨料；力学指标；超声检测；声学参数

Key words : Recycled concrete; Recycled coarse aggregate; Mechanical index; Ultrasonic testing; Acoustic parameter

刊期 : 2024年第4期

DOI : 10.19761/j.1000-4637.2024.04.082.05

文章编号 :

基金项目 : 贵州建研科技集团有限公司科技创新项目（建研科基2022-01号）。

作者 : 郭广1，周理1，2，*，王帮康1

单位 : 1.贵州大学建筑与城市规划学院，贵州贵阳 550003；2.贵州省山地人居智慧与绿色建造工程研究中心，贵州贵阳 550001

郭广1，周理1，2，*，王帮康1

郭广,周理,王帮康.基于超声检测的再生混凝土声学参数研究[J].混凝土与水泥制品,2024(4):82-86.

GUO G,ZHOU L,WANG B K.Study on acoustic parameters of recycled concrete based on ultrasonic testing[J].China Concrete and Cement Products,2024(4):82-86.

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摘要

参数

结论

参考文献

引用本文

Abstract: Five sets of specimens with different replacement rates of recycled coarse aggregates (0, 25%, 50%, 75%, 100%) were made, and their axial compressive strength, elastic modulus, and acoustic parameters before and after failure were tested. The relationships between the replacement rate of recycled coarse aggregates, mechanical indicators, and acoustic parameters were analyzed. The results show that as the replacement rate of recycled coarse aggregate increases, the axial compressive strength of the specimens shows a fluctuating upward trend and then a decreasing trend, while the elastic modulus shows a decreasing trend. Before the failure of the specimen, the data discreteness of the head wave sound velocity, head wave amplitude, and dominant frequency value of the specimen is relatively small. After the failure of the specimen, all acoustic parameters decrease compared to before the failure, and the data discreteness increases. The correlation between the head wave sound velocity and root mean square amplitude have a good correlation with the elastic modulus.

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