Continuous pouring seamless construction method of expansive concrete reinforcing band replacing post-pouring band

Abstract

The invention belongs to the technical field of construction, and discloses a continuous pouring seamless construction method of an expansive concrete reinforcing band replacing a post-pouring band. The continuous pouring seamless construction method comprises the steps that reinforcing cages and supporting templates are manufactured; concrete outside the expansive reinforcing band is poured; concrete inside the expansive reinforcing band is poured; vibrating compaction and maintenance are carried out; and templates are removed, and the shrinkage and cracking conditions of the concrete are detected. According to the continuous pouring seamless construction method of the expansive concrete reinforcing band replacing the post-pouring band, the post-pouring band is replaced with the expansiveconcrete reinforcing band, the mixing amount of a high-effect expanding agent in the concrete outside and inside the expansive reinforcing band is reasonably designed, outside the expansive reinforcing band is 8%-10%, and inside the expansive reinforcing band is 12%-13% ( equivalent replacement cement); so that the expansion rate of the concrete at the most prone to cracking positions is improved, the tensile stress in the concrete at the most prone to cracking positions is eliminated, the cracking is avoided, the compactness of the concrete is further improved, and the strength, crack resistance and seepage-proofing performance of the concrete are improved; and meanwhile, the construction period is shortened, and the effect is remarkable.

Description

technical field [0001] The invention belongs to the technical field of construction, and in particular relates to a continuous pouring seamless construction method in which an expansive concrete reinforcing belt replaces a post-casting belt. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] During concrete construction, in order to adapt to environmental temperature changes, concrete shrinkage, uneven settlement of the structure and other factors, the beams, slabs (including the foundation floor), walls and other structures have a certain width and are poured after a certain period of time. Concrete strips are temporary construction joints left at the corresponding positions of foundation slabs, walls, and beams in accordance with design or construction specifications. The method of reserving post-pouring strips effectively avoids the harmful cracks that may occur in the cast-in-place reinforced concre...

AI Technical Summary

Problems solved by technology

[0005] The method of reserving post-pouring strips effectively avoids harmful cracks that may occur in cast-in-place reinforced concrete structures due to uneven shrinkage or uneven settlement. Integrality creates uneven stresses and therefore method causes schedule delays

[0006] In the prior art, the strength test method of concrete cannot accurately reflect the actual strength of the structure, and is not suitable for the estimation of the strength of concrete in different periods

At the same time, it increases the complexity of the equipment and increases the detection cost

[0007] The maintenance method in the initial stage after concrete pouring in the prior art cannot avoid that the environment where the early concrete is located does not maintain sufficient humidity, which increases the evaporation of a large amount of water in the concrete, and the continued hydration of the cement is affected by drying and dehydration

At the same time, due to the increase of concrete drying shrinkage, the concrete bears the tensile stress caused by shrinkage in a low-strength state, resulting in early cracks in the concrete.

[0008] (4) the method for concrete formwork removal in the prior art, in the formwork removal process, can't improve the efficiency of dismantling, prolongs the time of dismantling

During the demolition process, it is easy to damage the poured concrete

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