Ultrahigh-strength and ultrathin bottom board for laminated slab and production method thereof

Abstract

The invention provides an ultrahigh-strength and ultrathin bottom board for a laminated slab and a production method thereof. The ultrahigh-strength and ultrathin bottom board comprises a bottom board made of a fiber-toughened cement-based composite material, wherein a longitudinally and horizontally-distributed steel wire mesh formed by longitudinally-distributed bars and horizontally-distributed steel bars is arranged in the bottom board, and an interface shear-resistant connecting piece is arranged on the steel wire mesh. The ultrahigh-strength and high-performance fiber-toughened cement-based composite material is applied to the design of a bottom board of the laminated slab, so that ultrahigh-strength and ultrathin bottom board for the laminated slab is formed. The bottom board has the advantages of ultrahigh strength, thin thickness, high crack resistance, light weight, durability and the like, and can create great economic and social benefits after being popularized.

Description

technical field [0001] The invention relates to a building material, and the invention also relates to a preparation method of the building material. Specifically, it is an ultra-high-strength and ultra-thin base plate for prefabricated building laminated plates and bridge deck laminated plates and a production method thereof. Background technique [0002] The laminated slab is a kind of prefabricated concrete slab as the bottom plate, and the concrete laminated layer is poured on it. After the pouring is completed, the two are used as an assembled integral floor slab. It is mainly used in structures such as prefabricated buildings and bridge deck laminated slabs. The current laminate floor design still has the following deficiencies: [0003] (1) The current laminated slab floor is basically designed with prestressed reinforcement. The prestressed member involves the production process of prestressed steel bar tensioning, etc., which is not convenient for the industrial pr...

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Problems solved by technology

[0003] (1) The current laminated slab floor is basically designed with prestressed reinforcement. The prestressed member involves the production process of prestressed steel bar tensioning, etc., which is not convenient for the industrial production of the laminated slab floor, and also affects the product cost.

[0004] (2) The existing laminated slab floor is basically made of ordinary strength concrete. Due to the low crack resistance and impact resistance of the material, the ordinary concrete laminated slab floor is easy to crack during transportation and construction

The traditional prestressed laminated slab floor adopts prestressing technology, but it can only control the crack expansion to a certain extent, and cannot fundamentally solve the problem of brittle cracking of concrete materials. The fundamental way to solve the brittle cracking of concrete is to increase the tensile strength of the material

[0005] (3) Due to the relatively low elastic modulus of ordinary concrete, the section stiffness is relatively low. In order to improve the stiffness, the section thickness of the bottom slab has to be increased. The increase in thickness makes the stress bars in the post-cast concrete slab move up, which is very important for the structure Unfavorable bending performance

In addition, the thickness of the laminated board increases, resulting in an increase in self-weight, which is not conducive to construction and handling

[0006] (4) The bottom plate of the laminated slab is located at the lower edge of the structure, and its durability directly affects the overall performance of the structure, but the durability of ordinary concrete is relatively low

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