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Preparation process of an improved concrete prefabricated slab

A preparation process and technology for concrete, applied in the direction of hydraulic material layered products, chemical instruments and methods, layered products, etc., can solve problems such as plate cracking, avoid cracking, high static slurry flow rate, and improve dispersion. effect of effect

Active Publication Date: 2019-01-11
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 a preparation process for an improved concrete prefabricated slab, the prefabricated concrete slab produced by the preparation process utilizes the high stretchability of the fiber to improve the deformation of the slab body Ability to avoid cracking of the board

Method used

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  • Preparation process of an improved concrete prefabricated slab
  • Preparation process of an improved concrete prefabricated slab
  • Preparation process of an 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 in particular discloses a preparation process of an improved concrete prefabricated slab. The improved concrete prefabricated slab includes a slab body, and the slab body includes a common concrete part and a first fiber concrete part respectively connected to the common concrete part. and the second fiber concrete part, the first fiber concrete part and the second fiber concrete part are arranged crosswise, and the first fiber concrete part and the second fiber concrete part both run through the ordinary concrete part; By adding the first fiber concrete part and the second fiber concrete part to the concrete prefabricated slab, the high tensile properties of the fibers are used to improve the deformation capacity of the prefabricated slab, to avoid cracking of the prefabricated slab, and to avoid the connection between the prefabricated slab and other structures. Cracking occurs; the use of fiber concrete parts in conjunction with ordinary concrete parts can also reduce the manufacturing cost of prefabricated panels.

Description

technical field [0001] The invention relates to the technical field of building materials, and in particular discloses a preparation process of 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 (mainly including cement stone and mortar). Poor, the existing concrete prefabricated slabs will crack due to thermal expansion and contraction during use, which seriously affects the use and appearance of the concrete prefabricated slabs. 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 a preparation process for an improved concrete prefabricated slab, the prefabricated concrete slab produced by the preparation process utilizes the high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B13/04C04B28/04C04B14/38C04B16/06C04B14/48C04B24/24E04C2/30B32B13/06B32B13/02B32B3/08
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