A high-strength lightweight concrete prefabricated slab

Abstract

The invention discloses a high-intensity lightweight concrete prefabricated slab. The high-intensity lightweight concrete prefabricated slab comprises concrete layers, heat insulation layers, a strengthening layer and surface layers, wherein the surface layers are arranged on the upper and lower surfaces of the prefabricated slab; the heat insulation layer, the concrete layer, the strengthening layer, the concrete layer and the heat insulation layer are sequentially arranged between the upper and lower surface layers in sequence; the strengthening layer comprises a grid framework made of a carbon fiber guide rod, and a metal screen mesh which covers the grid framework; and each heat insulation layer is formed by covering a polyurethane foam layer with a mortar layer. According to the high-intensity lightweight concrete prefabricated slab, the sizes can be formulated according to design requirements and the shapes of the slabs can be adapted to different requirements. The factory production and prefabrication can be realized; the high-intensity lightweight concrete prefabricated slab can be transported to a strengthening field to be directly assembled, and is convenient and rapid, and the construction period is shortened. The performance that the deformation of new and old concrete layer interfaces is not coordinated is improved. The prefabricated slab has a good energy absorption effect, an anti-seismic property of a structure component can be improved and the intensity of the prefabricated slab is enhanced.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a prefabricated panel, especially a high-strength lightweight concrete prefabricated panel. Background technique [0002] The design service life of general concrete structures is 50 years. When the building structure has reached the design service life, the structural performance has not been greatly reduced, and it can still be used normally after reinforcement. Considering that the cost of demolition and reconstruction is relatively high, the method of structural reinforcement can be used to repair and reinforce the structure to ensure that its bearing capacity meets requirements. [0003] At present, the reinforcement methods of building structures include enlarging the section, replacing concrete reinforcement, bonding outsourcing steel reinforcement, pasting steel plate reinforcement, pasting fiber reinforced plastic reinforcement and other methods. Both the en...

AI Technical Summary

Problems solved by technology

Both the enlarged section method and the replacement concrete method adopt concrete pouring. Although the construction process is simple and adaptable, the wet work time of on-site construction is long, which cannot meet the requirement of short cycle time

The construction method of bonded external steel reinforcement is simple and convenient, but it consumes a large amount of steel materials, and the cost is high, and it is not suitable for high-temperature places without protection

The reinforcement method of sticking steel plates is suitable for the reinforcement of flexural or tension members under static loads, and cannot improve the seismic performance

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