Three-dimensional multilayer-hollow fiber-reinforced concrete blanket capable of achieving lap joint

Abstract

The invention relates to a three-dimensional multilayer-hollow fiber-reinforced concrete blanket capable of achieving lap joint and belongs to the technical field of building materials. The three-dimensional multilayer-hollow fiber-reinforced concrete blanket comprises a three-dimensional hollow-multilayer fabric, a top layer packaging fabric and active dry powder concrete; one side edge or multiside edges of the three-dimensional hollow-multilayer fabric are manufactured into a U-shaped lap-joint part, and the three-dimensional hollow-multilayer fabric comprises a first layer, a second layerand a middle layer; the first layer forms a two-dimensional structure through warp and weft intertwining, and the second layer forms a three-dimensional multilayer structure through warp and weft intertwining; a plurality of grid holes are formed in the first layer, and a three-dimensional hollow structure is formed on the middle layer; vertical warps weave the first layer, the second layer and the middle layer into a three-dimensional integral structure; and the three-dimensional hollow structure is filled with the active dry powder concrete through the grid holes, and the top layer packaging fabric and a first layer package are composited into a whole. The three-dimensional multilayer-hollow fiber-reinforced concrete blanket is a composite concrete blanket which is of a reinforced structure and is high in integrality, reinforced, toughed, resistant to bending and cracking, convenient to use and capable of quickly achieving high-property and low-cost lap joint in the construction process.

Description

technical field [0001] The invention relates to a concrete blanket and belongs to the technical field of building materials. Background technique [0002] Concrete has become the most widely used building material in the world because of its reliability, low cost and good mechanical properties. Under the strong compressive performance, there is also the problem of brittleness of the material, which leads to cracking, reduced durability, and further damage to the structure, resulting in hidden dangers. Fiber reinforcement brings a great improvement in crack resistance, deformation resistance, ductility and dynamic load resistance for the matrix. Fiber fabric reinforced composite materials, including fiber fabric reinforced composite materials based on resin, ceramics, and concrete, have the advantages of light weight, high strength, and excellent comprehensive performance. more and more widely. [0003] The fabric reinforcement structure of the current fiber fabric reinfor...

AI Technical Summary

Problems solved by technology

[0004] 1. In the looped structure, the yarn buckling is relatively large, the internal reinforcing fibers are greatly bent, and there are many interweaving points, which is not conducive to the propagation of stress waves in the reinforced structure, which can easily lead to stress concentration and reduce the performance of the fibers;

[0005] 2. The extensibility caused by the looping of the warp-knitted three-dimensional fabric cannot allow the fibers to bear the stress and exert their supposed reinforcing effect;

[0006] 3. The toughening effect of the loop tacking cannot fully play the role of the fabric. When the cement-based material breaks, the toughening effect of the warp knitted fabric lags behind;

[0007] 4. The loop formation and buckling of three-dimensional spaced warp knitted fabric yarns are not suitable for the application of inorganic high-performance fibers (glass fiber, basalt fiber, carbon fiber, ceramic fiber, etc.), which limits the application and promotion of TRC in a wider range of fields

[0008] At present, the upper and lower layers of the three-dimensional hollow spacer fabric are two-dimensional single-layer structure fabrics, which have insufficient properties such as stretch resistance, bending resistance, puncture resistance, and abrasion resistance during use.

[0009] In addition, in terms of the existing overlapping methods, the current three-dimensional fabric reinforced composite materials mostly use the method of laminated overlapping, and the method of laminated overlapping has the following disadvantages: it is easy to produce laminated protrusions or The problem of uneven density is prone to stress concentration and uneven distribution of materials, resulting in material lap joints being easily damaged by force, and the way of flattening or hammering also causes waste of manpower, material resources and construction period, and is easy to cause damage to materials and uneven

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