Method for detecting solid strength of grouting material for grouting connection of rebar sleeve and method for detecting grouting material construction quality

Abstract

The invention relates to a method for detecting solid strength of a grouting material for grouting connection of a rebar sleeve in a prefabricated concrete structure and a method for detecting grouting material construction quality. The method for detecting the solid strength of the grouting material comprises the following steps: during production of a precast concrete unit, casing pipes extending out of concrete surface by predetermined lengths are mounted at a grouting hole and a grout outlet hole of the grouting sleeve respectively and are not bonded with concrete; the casing pipes fully filled with a hardened grouting material are taken out of the concrete unit after grouting connection construction is finished and a specified age is reached; the hardened grouting material is taken out of the casing pipes and processed into a sample; compressive strength of the sample is tested, and the solid strength of the grouting material is obtained. Besides, the grouting material filling condition at the top in a chamber of the grouting sleeve can be observed by an interior peeping device, and whether missing grouting exists and the grouting fullness are checked; the method overcome the defect that the solid strength and fullness of the grouting material in the grouting sleeve cannot be detected directly in the prior art, so that the quality of actual grouting construction can be detected.

Description

technical field [0001] The invention relates to the technical field of engineering quality detection, in particular to a method for detecting the solid strength of a grouting material and the grouting fullness of a steel bar sleeve grouting connection in an assembled concrete structure. Background technique [0002] Since the 18th National Congress of the Communist Party of China proposed to develop "new industrialization, informatization, urbanization, and agricultural modernization", the state has repeatedly put forward policy requirements for the development of prefabricated buildings. Beijing, Shanghai, Shenzhen, Shenyang, Anhui and other provinces and cities Specific implementation opinions were also issued. After entering 2016, the policy direction became more obvious: On February 6, 2016, the "Several Opinions of the Central Committee of the Communist Party of China and the State Council on Further Strengthening the Management of Urban Planning and Construction" requi...

AI Technical Summary

Problems solved by technology

Since the grouting sleeve is generally pre-embedded in the concrete during component production, and the grouting material is wrapped in the concrete and steel sleeve, the detection instrument cannot directly contact the surface of the grouting material, so the rebound method and rebound ultrasonic Neither method can be used to detect the strength of the grouting material in the sleeve; the core drilling method belongs to the detection method of local damage, because the grouting material is wrapped in the steel sleeve, and the thickness of the grouting material in the sleeve is generally 5-8mm, so The core drilling method is also not feasible

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