Crack control structure of micro-expansion concrete post-cast strip

Abstract

The invention discloses a crack control structure of a micro-expansion concrete post-cast strip, which comprises end clamping plates which are fixedly clamped on two end faces of a concrete post-cast strip, wherein an upper clamping plate is fixed on an upper surface of the concrete post-cast strip. According to the micro-expansion concrete post-cast strip crack control structure, the end clamping plates and the upper clamping plate are respectively and fixedly clamped on two end faces and the upper surface of the concrete post-cast strip, so that the two end faces and the surface layer of the cast concrete post-cast strip are constrained, further, air shrinkage of micro-expansion concrete in the concrete post-cast strip in the airing and using stages can be effectively controlled, and cracks can be effectively prevented from being generated in the concrete post-cast strip. The crack control structure of the micro-expansion concrete post-cast strip is applied to the field of building construction.

Description

technical field [0001] The invention relates to a building construction structure, in particular to a crack control structure after concrete pouring. Background technique [0002] In building construction, in order to prevent harmful cracks that may occur in cast-in-place reinforced concrete structures due to uneven temperature and shrinkage, temporary construction joints will be left in the corresponding positions of the foundation floor, walls, beams, etc. according to the design or construction specifications. Temporary construction joints generally have a certain width, and the structure can be temporarily divided into several parts through several temporary construction joints. After a certain period of time, it is generally waited until the internal shrinkage of the components is stable, and then the concrete is poured and tamped to connect the structure into a whole. [0003] Concrete mixed with expansive agent will expand differently than ordinary concrete in the in...

AI Technical Summary

Problems solved by technology

[0005] This kind of construction method will cause the micro-expansive concrete to expand upward after pouring, and the original parts on both sides will basically not squeeze it, that is, elastic compression will not occur, resulting in subsequent maintenance and use. Pulling away from the original parts on both sides, resulting in cracks on both sides of the post-casting belt, and some serious shrinkage, cracks will also appear in the concrete of the post-casting belt itself

In this way, groundwater will seep into the room through these cracks, and in severe cases, the steel bars in the structure may be corroded, thereby affecting the applicability, durability and structural safety of the building.

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