Method for detecting strength of pouring top surface of concrete by using in-situ secondary springback method

Abstract

The invention provides a method for detecting concrete strength by using an in-situ secondary springback method. The method comprises the following steps: mounting a resiliometer on a resiliometer stabilizing bracket; arranging a springback measuring area on the pouring top surface of a to-be-measured concrete member, and determining the distribution of measuring points in a measuring area; erecting the resiliometer stabilizing bracket at the positions of the measuring points of the pouring top surface of the concrete member, and enabling the resiliometer to be perpendicular to a pouring surface; pushing the resiliometer to enable the resiliometer to rebound once on the pouring top surface of the concrete; and on the premise that the bracket is not moved, pushing the resiliometer again torebound again at the same measuring point, keeping a springback direction and a springback position unchanged, and recording the springback value of second-time springback. The resiliometer rebounds on the resiliometer stabilizing bracket, and it can be guaranteed that two times of springback on one measuring point are located at the same position and springback angles are the same; and the concrete surface is leveled for the first time through first springback, so secondary springback data is more stable.

Description

technical field [0001] The invention relates to the technical field of concrete strength detection, in particular to a method for detecting concrete strength by an in-situ secondary rebound method. Background technique [0002] The rebound method to detect the compressive strength of concrete is one of the most commonly used detection methods, but at present, when testing the pumped concrete structure, it can only be tested in the horizontal direction on the side of the poured form, and cannot be tested on the upper surface of the form. Vertical downward rebound detection. The main reason is that the pouring surface of concrete components has poor flatness, and the unevenness on the surface will affect the rebound data during springback, resulting in unstable test results. Most of the construction projects under construction in China are poured by pumping concrete, and some components, such as: foundation rafts, floors, etc., need to be tested vertically downward on the upp...

AI Technical Summary

Problems solved by technology

[0002] The rebound method to detect the compressive strength of concrete is one of the most commonly used detection methods, but at present, when testing the pumped concrete structure, it can only be tested in the horizontal direction on the side of the poured form, and cannot be tested on the upper surface of the form. Vertical downward rebound detection

The main reason is that the pouring surface of concrete components has poor flatness, and the unevenness on the surface will affect the rebound data during rebound, resulting in unstable test results

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