基于超声检测的再生混凝土冻融循环损伤机制研究

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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冻融循环损伤机制研究

Study on freeze-thaw cycle damage mechanism of recycled concrete based on ultrasonic testing

2024年第9期

超声检测；再生混凝土；冻融循环；力学性能；损伤机理

Ultrasonic testing; Recycled concrete; Freeze-thaw cycle; Mechanical property; Damage mechanism

2024年第9期

10.19761/j.1000-4637.2024.09.114.06

国家自然科学基金资助项目（52368051）；新疆维吾尔自治区自然科学基金项目（2022D01C685）。

阿力普江·杰如拉1，2，吴聪1，阿不都塞买提·卡力1，杨彬3

1.新疆大学建筑工程学院，新疆乌鲁木齐 830046；2.新疆建筑结构与抗震重点实验室，新疆乌鲁木齐 830046；3.同济大学土木工程学院，上海 200092

阿力普江·杰如拉1，2，吴聪1，阿不都塞买提·卡力1，杨彬3

阿力普江·杰如拉,吴聪,阿不都塞买提·卡力,等.基于超声检测的再生混凝土冻融循环损伤机制研究[J].混凝土与水泥制品,2024(9):114-119.

ALIPUJIANG·Jierula, WU Cong, ABUDUSAIMAITI·Kari,et al.Study on freeze-thaw cycle damage mechanism of recycled concrete based on ultrasonic testing[J].China Concrete and Cement Products,2024(9):114-119.

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摘要：基于超声检测方法，研究了不同冻融循环次数（0、15、30 次）下不同再生粗骨料掺量（0、25%、50%、75%、100%）试件的声速、声时、波形、频率、振幅和力学性能变化，分析了再生混凝土的冻融循环损伤机理。结果表明：随着冻融循环次数和再生粗骨料掺量的增加，试件的抗压强度降低，声时增大，声速基本呈降低趋势，波形图的振幅衰减且波形趋于平缓，频域图的波峰基本呈降低趋势；超声检测参数有效揭示了再生混凝土在冻融循环下的损伤机制，可为再生混凝土的强度和内部缺陷情况评价提供参考。 Abstract: Based on ultrasonic testing method, the changes in sound velocity, sound time, waveform, frequency, amplitude, and mechanical properties of specimens with different recycled coarse aggregate contents (0, 25%, 50%, 75%, 100%) under different freeze-thaw cycles (0, 15, 30) were studied, and the freeze-thaw cycle damage mechanism of recycled concrete was analyzed. The results show that as the number of freeze-thaw cycles and the content of recycled coarse aggregate increase, the compressive strength of the specimen decreases, the sound time increases, and the sound velocity basically shows a decreasing trend. The amplitude of the waveform attenuates and the waveform tends to be flat, while the peak of the frequency domain graph basically shows a decreasing trend. The ultrasonic testing parameters effectively reveal the damage mechanism of recycled concrete under freeze-thaw cycles, which can provide references for the evaluation of the strength and internal defects of recycled concrete.

英文名 : Study on freeze-thaw cycle damage mechanism of recycled concrete based on ultrasonic testing

刊期 : 2024年第9期

关键词 : 超声检测；再生混凝土；冻融循环；力学性能；损伤机理

Key words : Ultrasonic testing; Recycled concrete; Freeze-thaw cycle; Mechanical property; Damage mechanism

刊期 : 2024年第9期

DOI : 10.19761/j.1000-4637.2024.09.114.06

文章编号 :

基金项目 : 国家自然科学基金资助项目（52368051）；新疆维吾尔自治区自然科学基金项目（2022D01C685）。

作者 : 阿力普江·杰如拉1，2，吴聪1，阿不都塞买提·卡力1，杨彬3

单位 : 1.新疆大学建筑工程学院，新疆乌鲁木齐 830046；2.新疆建筑结构与抗震重点实验室，新疆乌鲁木齐 830046；3.同济大学土木工程学院，上海 200092

阿力普江·杰如拉1，2，吴聪1，阿不都塞买提·卡力1，杨彬3

阿力普江·杰如拉,吴聪,阿不都塞买提·卡力,等.基于超声检测的再生混凝土冻融循环损伤机制研究[J].混凝土与水泥制品,2024(9):114-119.

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参考文献

引用本文

Abstract: Based on ultrasonic testing method, the changes in sound velocity, sound time, waveform, frequency, amplitude, and mechanical properties of specimens with different recycled coarse aggregate contents (0, 25%, 50%, 75%, 100%) under different freeze-thaw cycles (0, 15, 30) were studied, and the freeze-thaw cycle damage mechanism of recycled concrete was analyzed. The results show that as the number of freeze-thaw cycles and the content of recycled coarse aggregate increase, the compressive strength of the specimen decreases, the sound time increases, and the sound velocity basically shows a decreasing trend. The amplitude of the waveform attenuates and the waveform tends to be flat, while the peak of the frequency domain graph basically shows a decreasing trend. The ultrasonic testing parameters effectively reveal the damage mechanism of recycled concrete under freeze-thaw cycles, which can provide references for the evaluation of the strength and internal defects of recycled concrete.

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基于超声检测的再生混凝土冻融循环损伤机制研究

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