Lightweight preform and preparation method thereof

Abstract

The invention discloses a lightweight preform and a preparation method thereof. The lightweight preform comprises a hollow substrate (1) or a solid lightweight substrate (5), an upper-layer plate (2), a lower-layer plate (3) and a rebar assembly (4), wherein an upper-layer steel mesh in the rebar assembly (4) is located at the upper parts of the substrates (1 and 5); a lower-layer steel mesh in the rebar assembly (4) is located at the lower parts of the substrates (1 and 5); a Z-axis upright post rebar (4C) in the rebar assembly (4) passes through rectangular through holes of the substrates (1 and 5); the upper-layer plate (2) made of concrete contains the upper-layer steel mesh; and the lower-layer plate (3) made of the concrete contains a lower-layer steel mesh. The lightweight preform is reinforced by adopting hollow substrate (1) or the solid lightweight substrate (5) supplemented by rebar in three directions; and an upper panel, a lower panel and a Z-axis support (6) are formed through concrete injection to form the lightweight preform with spatial mechanical characteristics.

Description

technical field [0001] The present invention relates to a unit structure used for prefabricated houses, more particularly, refers to a lightweight prefabricated body used for building a house, and a method for constructing prefabricated houses using the lightweight prefabricated body. Background technique [0002] In the process of urbanization in my country, environmental and resource issues caused by buildings, energy conservation and emission reduction, circular economy, and building industrialization have become important issues in the construction of ecological civilization and sustainable development strategies. [0003] The main components in the building are floor slabs, roof slabs and wall panels, the largest in number, and how to manufacture floor slabs, roof slabs and wall panels is very important. Evacuate or fill light-weight materials in the middle of the floor, roof and wall panels to make hollow floors, interlayer floors, and interlayer insulation walls to re...

AI Technical Summary

Problems solved by technology

[0005] Compared with solid slabs, the above technologies have made great technological progress, but there are still shortcomings: In terms of application range, the hollow slab body is only suitable for the manufacturing process of prefabricated slabs; filling hollows and interlayers is mostly used for cast-in-place concrete Hollow floor construction technology; prefabricated and laminated slabs with the dual advantages of prefabrication and cast-in-place, only reinforced truss laminated slabs and prestressed concrete laminated slabs (PK slabs) have been successfully applied, but they are all solid slabs, and their own weight , the span is also limited

In terms of mechanical properties, the prefabricated concrete hollow slab with a hollow slab body is a unidirectional force-bearing slab, and the existing prestressed concrete circular hole slab and SP prestressed hollow slab do not meet the design requirements of "strongly connected weak members". Poor, has become the bottleneck of its application; filling the hollow cast-in-place concrete hollow slab, one is a strip-shaped tubular body core, due to the different moments of inertia in the two directions of the tubular body, the rigidity is not uniform, and the span is larger and the thickness of the slab is thicker. The circular hole plate has a low hollow rate; the other is a square box-shaped core filled with a planar structure, which has poor mechanical properties, a large amount of structural steel bars, and stress concentration at the corners; On the other hand, the hollow core made of GRC material has a high damage rate, heavy weight, and is not convenient for laying pipelines.

In terms of pipeline maintenance, the design concept of the "CSI" century-old building was not considered; the existing interlayer only serves the functions of filling and insulation

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