Different-strength-grade concrete structure of beam-column joint and construction technology of concrete structure

Abstract

The invention relates to a different-strength-grade concrete structure of a beam-column joint and a construction technology of the concrete structure. The position, no less than 500 mm away from a beam-column connector, of the interior of a beam is determined as a connecting face of high-strength-grade concrete and low-strength-grade concrete, a close-mesh steel wire mesh is hung at the position for isolation, and the steel wire mesh and beam stirrups are firmly bound to ensure that when the concrete is poured, the steel wire mesh is not displaced. In order to prevent the phenomenon that when the high-strength-grade concrete is poured, laitance is retained by penetrating through the bottom of the steel wire mesh, a laitance discharge port is reserved in a bottom formwork of an outer beam of the steel wire mesh; the laitance discharge port is blocked after the laitance of the high-strength-grade concrete is completely discharged before the low-strength-grade concrete is poured. According to the different-strength-grade concrete structure of the beam-column joint and the construction technology of the concrete structure, the construction operation procedures are normalized, shrinkage cracks on the connecting face of the high-strength-grade concrete and the low-strength-grade concrete of the beam-column joint are effectively controlled, and the appearance quality of the concrete is improved.

Description

technical field [0001] The invention relates to a beam-column joint concrete construction technology, in particular to a beam-column joint concrete structure with different strength levels and a construction technology thereof. Background technique [0002] At present, during the concrete construction of beam-column joints, when the concrete strength of the beam-column joints differs by two grades or more, no effective separation measures have been taken in the junction area, and the construction is relatively random. Micro cracks appear. Although these cracks are not structural cracks under load and do not affect the safe use of the structure, they affect the appearance quality of the concrete. Contents of the invention [0003] The present invention aims to solve the above-mentioned problems existing in the prior art, and provides a concrete structure with different strength grades of beam-column joints capable of improving the appearance quality of concrete and its con...

AI Technical Summary

Problems solved by technology

Although these cracks are not structural cracks under load and do not affect the safe use of the structure, they affect the appearance quality of the concrete

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