Floating point grid network for crack resistance of concrete surface layer and manufacturing method and application of floating point grid network

Abstract

The invention discloses a floating point grid network for crack resistance of a concrete surface layer. The floating point grid network comprises a fiber grid network body, an impregnating resin layer, and a plurality of floating point structures, wherein the fiber grid network body is formed by a plurality of warps and a plurality of wefts in an intersecting mode; the impregnating resin layer is formed on the surface of fibers through impregnating treatment; the multiple floating point structures are formed at the intersections of the warps and the wefts of the fiber grid network body and are identical in heights. The floating point structures protrude from the upper surface of the fiber grid network body, and each floating point structure is big-end-down and is in a conical shape. The fiber grid network body is a bidirectional orthorhombic isotropic grid network body which is manufactured with alkali-resisting, corrosion-resisting and rusting-free light high-strength fiber materials as base materials. High tensile strength and high crack resistance of the light high-strength fibers are sufficiently utilized, the floating point structures with uniform thicknesses are manufactured at the intersection points of the warps and the wefts through a mold by means of resin impregnating, in this way, the fiber fabric which is too soft can be converted into a rigid grid network material, and meanwhile, the depth of the portion, buried into the concrete surface layer, of the floating point grid network is controlled through the floating points.

Description

technical field [0001] The invention relates to the technical field of concrete construction, in particular to the concrete slab crack control technology. [0002] technical background [0003] Massive concrete, especially slab concrete slab structures poured in layers, such as dock surface, large floor slab, bridge surface, etc., are extremely prone to harmful cracks after construction. Concrete cracks have always been difficult to solve in engineering. According to the existing theories, the reasons for the cracking of concrete slabs are very complicated. The most important reason is that the concrete cannot shrink freely under the action of external constraints, resulting in excessive external constraint stress, which is greater than the tensile strength of concrete at that time. In addition, the internal and external temperature difference caused Internal restraint stress and plastic cracking caused by air-drying and dehydration are likely to lead to cracking of the concr...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems encountered in the above projects, overcome the difficulties in embedding crack-resistant steel mesh and poor durability in the prior art, and effectively prevent cracking of large-area concrete slabs after construction

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