Precast member for lightweight concrete board

Abstract

A hollow component for hollow reinforced concrete consists of at least one tubular body having longitudinal holes with rectangular sections, a whole base plate, at least one lateral rib duct in perpendicular or tilted with the axial line of the tubular body, at least one connecting part between the tubular bodies, and the longitudinal holes are filled lightweight materials. The component can be manufactured easily at low cost, reduce difference in lateral or longitudinal strength so as to have good mechanical performance. It can be used for hollow board, roof, wall, basement or hollow bridge beam.

Description

(1) Technical field [0001] The invention relates to a prefabricated component for a concrete lightweight board. (2) Background technology [0002] At present, in the existing technology, the hole-forming components of cast-in-place concrete hollow slabs are permanent mandrels, such as paper tubes, plastic tubes, metal bellows, and lightweight materials for mandrels. These tubular mandrels or components are mainly considered to evacuate concrete. Reduce the weight of hollow-core panels. For example, the patent No. 99249755.8 applied by the applicant is a utility model patent for "fiber-reinforced thin-walled tube for filling cast-in-place reinforced concrete". It consists of a hard thin-walled tube and plugs at both ends. Both ends of the tube are closed to form a closed cavity, and the cross section of the hard thin-walled tube and the shape of the plug can be round, square, trapezoidal or other special shapes. This kind of pipe has the advantages of high strength, anti-de...

AI Technical Summary

Problems solved by technology

But after it is applied to the cast-in-place concrete hollow slab, since the tubular concrete in the center of the hard thin-walled tube in the cast-in-place concrete hollow slab has been evacuated, there are cast-in-place concrete ribs along the longitudinal direction of the tube, and in the transverse direction because the reinforced concrete has been It is evacuated by the mandrel or the component, and only the two plugs are used as the force transmission rib. Therefore, it cannot bear the complex tension, pressure, shear force, torque, etc., and there is a large difference in stiffness between the two directions of the cast-in-place concrete hollow slab. However, it becomes a cast-in-place reinforced concrete hollow one-way slab, which cannot form the equivalent two-way slab with well-shaped ribs.

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