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

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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 sl

Method used

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

Examples

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Example Embodiment

[0050] Example 2

[0051] In this embodiment, the first fiber reinforced concrete part 12 and the first fiber reinforced concrete part 13 are both composed of the following components by weight: 40 parts of cement, 48 parts of sand, 70 parts of crushed stone, 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 equivalent diameter of the polypropylene fibers is 400 μm, the aspect ratio is 55, the tensile strength is greater than 500 MPa, and the elastic modulus is 7 GPa. The diameter of the steel fiber is 563 μm, the aspect ratio is 65, the tensile strength is greater than 700 MPa, and the elastic modulus is 190 GPa.

[0053] In this example, the water reducing agent is prepared from the following raw materials in molar parts according to the following preparation method: 1 part of polyethylene glycol monomethyl et...

Example Embodiment

[0056] Example 3

[0057] In this embodiment, the first fiber reinforced concrete part 12 and the first fiber reinforced concrete part 13 are both composed of the following components by weight: 45 parts of cement, 42 parts of sand, 80 parts of crushed stone, 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 equivalent diameter of the polypropylene fiber is 500 μm, the aspect ratio is 62, the tensile strength is greater than 500 MPa, and the elastic modulus is 7.6 GPa. The diameter of the steel fiber is 550 μm, the aspect ratio is 65, the tensile strength is greater than 700 MPa, and the elastic modulus is 240 GPa.

[0059] In this embodiment, the preparation method of the water reducing agent includes the following steps: by molar part, 1.5 parts of polyethylene glycol monomethyl ether acrylate and 1.5 parts of...

Example Embodiment

[0062] Example 4

[0063]In this embodiment, both the first fiber reinforced concrete part 12 and the second fiber reinforced concrete part 13 are composed of the following components by weight: 42 parts of cement, 42 parts of sand, 70 parts of crushed stone, 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 equivalent diameter of the polypropylene fiber is 484 μm, the aspect ratio is 65, the tensile strength is greater than 500 MPa, and the elastic modulus is 7.3 GPa. The diameter of the steel fiber is 600 μm, the aspect ratio is 62, the tensile strength is greater than 700 MPa, and the elastic modulus is 233 GPa.

[0065] In this embodiment, the preparation method of the water-reducing agent includes the following steps: by molar parts, 1.3 parts of polyethylene glycol monomethyl ether acrylate and 1.4 parts...

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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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