On-site lossless evaluation method for compressive strength of release structure concrete after washing and grinding

By constructing the impact depth-compressive strength curve through 3D scanning and springback testing, and combining it with ultrasonic sensor monitoring, the problem of non-destructive testing of the compressive strength of spillway structures after impact was solved, and non-destructive testing was achieved.

CN120869737APending Publication Date: 2025-10-31XIAN UNIV OF TECH
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Patent Information

Application Number
CN202511167996.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-20
Publication Date
2025-10-31

AI Technical Summary

Technical Problem

Existing methods for testing the compressive strength of concrete after impact in spillway structures require core drilling, which can lead to irreversible damage. There is a lack of non-destructive testing methods.

Method used

A handheld 3D scanner was used to acquire a surface model of the concrete test block and mesh it. A rebound test was conducted using a grinding device to construct a grinding depth-rebound value curve, which was then reconstructed into a grinding depth-compressive strength curve. Ultrasonic sensors were pre-embedded in the flood discharge channel to monitor the thickness of the concrete layer, and the compressive strength was corrected through the rebound test.

Benefits of technology

This method enables non-destructive testing of the compressive strength of concrete in spillway structures after abrasion, avoiding damage and providing a real-time, non-destructive, and intuitive testing method.

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Abstract

The invention discloses an on-site nondestructive evaluation method for compressive strength of release structure concrete after impact grinding, and the method comprises the following specific steps: step 1, preparing a concrete test block, obtaining a surface model of the concrete test block, and carrying out meshing on the surface model to obtain a first meshing model; 2, the concrete test block is installed in a punching and grinding device to be subjected to a punching and grinding test, a springback test is conducted on the punching and grinding face of the concrete test block after punching and grinding, and a punching and grinding depth-springback value curve is constructed; step 3, reconstructing a punching and grinding depth-rebound value curve as a punching and grinding depth-compressive strength curve; and 4, carrying out in-situ test in the floodway, and combining with the punching and grinding depth-compressive strength curve to obtain the final compressive strength. The method provided by the invention can detect the compressive strength of the water release structure after the concrete is washed and abraded under the condition of no damage.
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