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Improved concrete prefabricated slab

A technology for concrete and prefabricated panels, applied in the direction of hydraulic material layered products, building components, layered products, etc., can solve problems such as plate cracking, avoid cracking, high static slurry flow rate, and improve cohesion and the effect of workability

Active Publication Date: 2016-08-31
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide an improved concrete prefabricated slab, which can improve the deformation ability of the slab body by utilizing the high stretchability of the fiber, and avoid the phenomenon of cracking of the slab body

Method used

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  • Improved concrete prefabricated slab
  • Improved concrete prefabricated slab
  • Improved concrete prefabricated slab

Examples

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Embodiment 2

[0051] In this embodiment, the first fiber concrete part 12 and the first fiber concrete part 13 are composed of the following components in parts by weight: 40 parts of cement, 48 parts of sand, 70 parts of gravel, 5 parts of fly ash, and 16 parts of water , 2 parts of slag, 0.04 part of basalt fiber, 0.1 part of polypropylene fiber, 0.1 part of steel fiber, and 0.5 part of water reducing agent.

[0052] In this embodiment, the polypropylene fiber has an equivalent diameter of 400 μm, an aspect ratio of 55, a tensile strength greater than 500 MPa, and an elastic modulus of 7 GPa. The steel fiber has a diameter of 563 μm, an aspect ratio of 65, a tensile strength greater than 700 MPa, and an elastic modulus of 190 GPa.

[0053] In this example, the water reducer is prepared from the following molar parts of raw materials according to the following preparation method: 1 part of polyethylene glycol monomethyl ether acrylate, 2-acrylamido-2-methylpropanesulfonate sodium 1 part, ...

Embodiment 3

[0057] In this embodiment, the first fiber concrete part 12 and the first fiber concrete part 13 are composed of the following components in parts by weight: 45 parts of cement, 42 parts of sand, 80 parts of gravel, 2 parts of fly ash, and 20 parts of water , 1 part of slag, 0.08 part of basalt fiber, 0.05 part of polypropylene fiber, 0.2 part of steel fiber, and 0.3 part of water reducing agent.

[0058] In this embodiment, the polypropylene fiber has an equivalent diameter of 500 μm, an aspect ratio of 62, a tensile strength greater than 500 MPa, and an elastic modulus of 7.6 GPa. The steel fiber has a diameter of 550 μm, an aspect ratio of 65, a tensile strength greater than 700 MPa, and an elastic modulus of 240 GPa.

[0059] In this embodiment, the preparation method of the water reducing agent comprises the following steps: in molar parts, 1.5 parts of polyethylene glycol monomethyl ether acrylate, 1.5 parts of sodium 2-acrylamido-2-methylpropanesulfonate , 4 parts of m...

Embodiment 4

[0063]In this embodiment, the first fiber concrete part 12 and the second fiber concrete part 13 are composed of the following components by weight: 42 parts of cement, 42 parts of sand, 70 parts of gravel, 3 parts of fly ash, and 19 parts of water , 2 parts of slag, 0.06 part of basalt fiber, 0.07 part of polypropylene fiber, 0.12 part of steel fiber, and 0.4 part of water reducing agent.

[0064] In this embodiment, the polypropylene fiber has an equivalent diameter of 484 μm, an aspect ratio of 65, a tensile strength greater than 500 MPa, and an elastic modulus of 7.3 GPa. The steel fiber has a diameter of 600 μm, an aspect ratio of 62, a tensile strength greater than 700 MPa, and an elastic modulus of 233 GPa.

[0065] In this embodiment, the preparation method of the water reducing agent comprises the following steps: in molar parts, 1.3 parts of polyethylene glycol monomethyl ether acrylate, 1.4 parts of sodium 2-acrylamido-2-methylpropanesulfonate , 3.2 parts of methac...

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Abstract

The invention relates to the technical field of building materials and particularly discloses an improved concrete prefabricated slab. The improved concrete prefabricated slab comprises a slab body. The slab body comprises a common concrete part, a first fiber concrete part and a second fiber concrete part, wherein the first fiber concrete part and the second fiber concrete part are connected with the common concrete part and arranged in a crossed mode, and penetrate through the common concrete part. Concrete is prepared from cement paste or cement mortar or other cement base materials. According to the improved concrete prefabricated slab, the first fiber concrete part and the second fiber concrete part are additionally arranged, so that the deformation capability of the prefabricate slab is improved through the high stretchability of fibers, the prefabricated slab is prevented from cracking, and meanwhile connecting parts of the prefabricated slab and other structures are prevented from cracking; the fiber concrete parts and the common concrete part are used in a matched mode, and thus the manufacturing cost of the prefabricated slab can be reduced.

Description

technical field [0001] The invention relates to the technical field of building materials, and in particular discloses an improved concrete prefabricated board. Background technique [0002] In construction engineering, prefabricated concrete slabs have been widely used due to their quick manufacture and good structural strength. Most of the existing prefabricated concrete slabs are made of ordinary concrete (including cement stone and mortar, etc.). Due to the lower tensile properties of ordinary concrete Poor, the existing concrete prefabricated slab will crack due to non-uniform expansion and contraction during use, which seriously affects the use and appearance of the concrete prefabricated slab. Contents of the invention [0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide an improved concrete prefabricated panel, which utilizes the high stretchability of fibers to improve the deformation c...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/38C04B16/06C04B14/48C04B24/24E04C2/30B32B13/06B32B13/02B32B13/04B32B3/08
CPCB32B3/08B32B13/02B32B13/04B32B13/06B32B2262/0253B32B2262/10B32B2262/103B32B2307/54B32B2307/714C04B28/04C04B2111/343C04B2201/50E04C2/30C04B14/06C04B14/02C04B18/08C04B18/141C04B14/4643C04B16/0633C04B14/48C04B24/24
Inventor 于国友苗青
Owner DONGGUAN UNIV OF TECH
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