含水率对掺硅灰混凝土声学特性的影响研究_《混凝土与水泥制品》杂志社

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含水率对掺硅灰混凝土声学特性的影响研究

Water Content and Its Effect on Acoustic Characteristics of Silica Fume Concrete

２０19年第9期

硅灰混凝土；含水率；超声波测试；波速；抗压强度

Silica fume concrete; Water content; Ultrasonic tests; Ultrasonic wave velocity; Compression strength

２０19年第9期

10.19761/j.1000-4637.2019.09.015.04

中国地震局地震预测研究所基本科研业务费专项项目（2014IESLZ01）；国家科技支撑计划项目（2014BAG05B05）；国家自然科学基金项目（51678545、41472297）。

刘琨1 ，严武建1,2，牛富航2 ，吴志坚3 ，郑海忠1

1.中国地震局兰州地震研究所中国地震局（甘肃省）黄土地震工程重点实验室，兰州 730000； 2.中国科学院西北生态环境资源研究院冻土工程国家重点实验室，兰州 730000； 3.南京工业大学交通学院，211800

刘琨1 ，严武建1,2，牛富航2 ，吴志坚3 ，郑海忠1

刘琨,严武建,牛富航,等.含水率对掺硅灰混凝土声学特性的影响研究[J].混凝土与水泥制品,2019(9):15-18.

LIU K,YAN W J,NIU F H,et al.Water Content and Its Effect on Acoustic Characteristics of Silica Fume Concrete[J].China Concrete and Cement Products,2019(9):15-18.

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摘要：为了研究含水率对硅灰混凝土的声波参数和物理力学性质的影响，进行了硅灰混凝土的超声波测试，同时测试了其在零含水率情况下的抗压强度。并基于试验结果分析了含水率对硅灰混凝土波速的影响以及波速与抗压强度的关系。结果表明，硅灰混凝土超声波纵波速度随含水率的增大逐渐增大且至饱和状态达到峰值，含水率从零增大至2%附近时，横波波速先增大而后随含水率的增大急剧减小；硅灰混凝土声波波速与抗压强度存在良好的线性相关性，在相同含水率条件下，硅灰混凝土的抗压强度越大，声波波速越高。通过对含水率的估算，可以将这一特性应用到无损检测中，作为评定混凝土强度变化的手段之一。 Abstract: In order to study the influence of water content on the acoustic characteristics and the mechanical properties of silica fume concrete, ultrasonic tests in silica fume concrete were conducted and compressive strengths were measured on the zero water content. Based on the testing results, the effect of water content on the ultrasonic wave velocity of silica fume concrete and the relationship between the wave velocity and the compressive strength was discussed. Ultrasonic P-wave velocity of silica fume concrete increased gradually with the increase of water content and reached the peak when the saturation state, the S-wave velocity increased with the increase of water content from zero water content then decreased sharply with the peak of water content. There existed a good linear correlation between the ultrasonic wave velocity and the compression strength of silica fume concrete. The larger the compression strength，the faster the wave. It can be concluded that by estimating the water content, this characteristic can be applied to NDE as one of the means for assessing the change of concrete strength.

英文名 : Water Content and Its Effect on Acoustic Characteristics of Silica Fume Concrete

刊期 : ２０19年第9期

关键词 : 硅灰混凝土；含水率；超声波测试；波速；抗压强度

Key words : Silica fume concrete; Water content; Ultrasonic tests; Ultrasonic wave velocity; Compression strength

刊期 : ２０19年第9期

DOI : 10.19761/j.1000-4637.2019.09.015.04

文章编号 :

基金项目 : 中国地震局地震预测研究所基本科研业务费专项项目（2014IESLZ01）；国家科技支撑计划项目（2014BAG05B05）；国家自然科学基金项目（51678545、41472297）。

作者 : 刘琨1 ，严武建1,2，牛富航2 ，吴志坚3 ，郑海忠1

单位 : 1.中国地震局兰州地震研究所中国地震局（甘肃省）黄土地震工程重点实验室，兰州 730000； 2.中国科学院西北生态环境资源研究院冻土工程国家重点实验室，兰州 730000； 3.南京工业大学交通学院，211800

刘琨1 ，严武建1,2，牛富航2 ，吴志坚3 ，郑海忠1

刘琨,严武建,牛富航,等.含水率对掺硅灰混凝土声学特性的影响研究[J].混凝土与水泥制品,2019(9):15-18.

LIU K,YAN W J,NIU F H,et al.Water Content and Its Effect on Acoustic Characteristics of Silica Fume Concrete[J].China Concrete and Cement Products,2019(9):15-18.

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摘要

参数

结论

参考文献

引用本文

摘要：为了研究含水率对硅灰混凝土的声波参数和物理力学性质的影响，进行了硅灰混凝土的超声波测试，同时测试了其在零含水率情况下的抗压强度。并基于试验结果分析了含水率对硅灰混凝土波速的影响以及波速与抗压强度的关系。结果表明，硅灰混凝土超声波纵波速度随含水率的增大逐渐增大且至饱和状态达到峰值，含水率从零增大至2%附近时，横波波速先增大而后随含水率的增大急剧减小；硅灰混凝土声波波速与抗压强度存在良好的线性相关性，在相同含水率条件下，硅灰混凝土的抗压强度越大，声波波速越高。通过对含水率的估算，可以将这一特性应用到无损检测中，作为评定混凝土强度变化的手段之一。
Abstract: In order to study the influence of water content on the acoustic characteristics and the mechanical properties of silica fume concrete, ultrasonic tests in silica fume concrete were conducted and compressive strengths were measured on the zero water content. Based on the testing results, the effect of water content on the ultrasonic wave velocity of silica fume concrete and the relationship between the wave velocity and the compressive strength was discussed. Ultrasonic P-wave velocity of silica fume concrete increased gradually with the increase of water content and reached the peak when the saturation state, the S-wave velocity increased with the increase of water content from zero water content then decreased sharply with the peak of water content. There existed a good linear correlation between the ultrasonic wave velocity and the compression strength of silica fume concrete. The larger the compression strength，the faster the wave. It can be concluded that by estimating the water content, this characteristic can be applied to NDE as one of the means for assessing the change of concrete strength.

关键词:

硅灰混凝土；含水率；超声波测试；波速；抗压强度

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含水率对掺硅灰混凝土声学特性的影响研究

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