Quality evaluation of lightweight cellular concrete by an ultrasound-based method

doi:10.1007/s11709-022-0874-5

Frontiers of Structural and Civil Engineering

2022, Vol. 16

Issue (9): 1170-1182 https://doi.org/10.1007/s11709-022-0874-5

本期目录

Quality evaluation of lightweight cellular concrete by an ultrasound-based method

Xin LIU^1,^2,³(

), Dongning SUN^1,³, Jinhe LIAO⁴, Zhiwei SHAO^1,³, Yunqiang SHI^1,², Siqing ZHANG^1,², Yunlong YAO^1,³, Baoning HONG^1,³

¹. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
². Institute of Tunnel and Underground Engineering, Hohai University, Nanjing 210098, China
³. Geotechnical Research Institute, Hohai University, Nanjing 210098, China
⁴. Foshan Jianying Development Co., Ltd., Foshan 528041, China

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Abstract：

The accuracy of subgrade quality evaluation is important for road safety assessment. Since there is little research work devoted to testing lightweight cellular concrete (LCC) by an ultrasound-based method, the quantitative relation between ultrasonic testing results and the quality of LCC subgrade is not well understood. In this paper, the quality of LCC subgrade was evaluated with respect to compressive strength and crack discrimination. The relation between ultrasonic testing results and LCC quality was explored through indoor tests. Based on the quantitative relation between ultrasonic pulse velocity and compressive strength of LCC, a fitting formula was established. Moreover, after the LCC became cracked, the ultrasonic pulse velocity and ultrasonic pulse amplitude decreased. After determining the lower limiting values of the ultrasonic pulse velocity and ultrasonic pulse amplitude through the statistical data, it could be calculated whether there were cracks in LCC subgrade. The ultrasonic testing results showed that the compressive strength of the LCC subgrade was suitable for purpose and there was no crack in the subgrade. Then core samples were taken from the subgrade. Comparisons between ultrasonic testing results of subgrade and test results of core samples demonstrated a good agreement.

Key words： lightweight cellular concrete subgrade ultrasound testing quality evaluation crack discrimination

收稿日期: 2022-01-18 出版日期: 2022-12-22

Corresponding Author(s): Xin LIU

引用本文:

. [J]. Frontiers of Structural and Civil Engineering, 2022, 16(9): 1170-1182.
Xin LIU, Dongning SUN, Jinhe LIAO, Zhiwei SHAO, Yunqiang SHI, Siqing ZHANG, Yunlong YAO, Baoning HONG. Quality evaluation of lightweight cellular concrete by an ultrasound-based method. Front. Struct. Civ. Eng., 2022, 16(9): 1170-1182.

链接本文:

https://academic.hep.com.cn/fsce/CN/10.1007/s11709-022-0874-5
https://academic.hep.com.cn/fsce/CN/Y2022/V16/I9/1170

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