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A kind of concrete prepared by using synthetic double helix fiber and its preparation method

A double helix, concrete technology, applied in yarn, textile and paper making, etc., can solve the problems of low flexural strength, brittle fracture, unsatisfactory lifting effect, etc., and achieve the effect of improving performance

Active Publication Date: 2020-08-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, concrete also has its defects, such as brittle fracture and low flexural strength. Compared with the prior art, in order to improve its brittleness, organic fibers or steel fibers are added to the general concrete to enhance the bending and flexural resistance of the concrete. Performance, the researchers added fiber to prepare fiber-reinforced concrete such as glass fiber concrete, polypropylene fiber concrete, steel fiber concrete and carbon fiber concrete, all of which have improved effects to a certain extent, but the improvement effect is not ideal

Method used

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  • A kind of concrete prepared by using synthetic double helix fiber and its preparation method
  • A kind of concrete prepared by using synthetic double helix fiber and its preparation method
  • A kind of concrete prepared by using synthetic double helix fiber and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0046] A kind of synthetic double-helix fiber with negative Poisson's ratio effect prepares concrete, by weight parts, comprising the following components:

[0047] 584.4 parts of ordinary Portland cement, 292.2 parts of fly ash, 97.4 parts of silica fume, 29.2 parts of expansion agent,

[0048] 1071.4 parts of fine aggregate, 117.4 parts of double helix fiber synthesized by rubber elastic thread (d=1.5mm) and carbon fiber, 48.7 parts of polycarboxylate water reducer, and 146.1 parts of water.

[0049] Preparation:

[0050] The preparation process of the synthetic double helix fiber with negative Poisson's ratio effect is as follows: 1. Assembly: The whole preparation device is divided into three parts ① Core yarn delivery device: fix the runner wound with the elastic thread on the iron frame so that it cannot move It can only rotate; ②Winding device: install the carbon fiber on the welded carrying device and fix it, and then fix the carrying device on the hollow spindle, so ...

Embodiment 2

[0057] A kind of synthetic double-helix fiber with negative Poisson's ratio effect prepares concrete, by weight parts, comprising the following components:

[0058] Ordinary Portland cement 584.4 parts, fly ash 289.2 parts, silica fume 96.9 parts, expansion agent 29.4 parts,

[0059] 1071.4 parts of fine aggregate, 118.5 parts of double helix fiber synthesized by rubber elastic thread (d=1.5mm) and glass fiber, 48.7 parts of polycarboxylate superplasticizer, and 146.1 parts of water.

[0060] Preparation:

[0061] The preparation process of the synthetic double helix fiber with negative Poisson's ratio effect is as follows: 1. Assembly: The whole preparation device is divided into three parts ① Core yarn delivery device: fix the runner wound with the elastic thread on the iron frame so that it cannot move Can only rotate; ②Winding device: install the glass fiber on the welded carrying device and fix it, and then fix the carrying device on the hollow spindle, so that it cannot...

Embodiment 3

[0068] A kind of synthetic double-helix fiber with negative Poisson's ratio effect prepares concrete, by weight parts, comprising the following components:

[0069] 584.4 parts of ordinary Portland cement, 292.2 parts of fly ash, 97.4 parts of silica fume, 29.2 parts of expansion agent,

[0070] 1071.4 parts of fine aggregate, 117.5 parts of double helix fiber synthesized by rubber elastic thread (d=1.2mm) and carbon fiber, 48.7 parts of polycarboxylate superplasticizer, and 146.1 parts of water.

[0071] Preparation:

[0072] The preparation process of the synthetic double helix fiber with negative Poisson's ratio effect is as follows: 1. Assembly: The whole preparation device is divided into three parts ① Core yarn delivery device: fix the runner wound with the elastic thread on the iron frame so that it cannot move It can only rotate; ②Winding device: install the carbon fiber on the welded carrying device and fix it, and then fix the carrying device on the hollow spindle, ...

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Abstract

The invention discloses concrete prepared by utilizing synthetic double-helix fibers with a negative Poisson's ratio and a preparation method of the concrete. The concrete is mainly prepared from thefollowing raw materials in parts by weight: 550-610 parts of ordinary Portland cement, 270-310 parts of fly ash, 80-110 parts of silica fume, 27-32 parts of an expanding agent, 960-1200 parts of fineaggregate, 110-240 parts of double-helix fibers, 45-55 parts of a polycarboxylate superplasticizer and 140-160 parts of water. Compared with the prior art, the concrete disclosed by the invention hasthe advantages that the raw materials comprise the double-helix fibers with the negative Poisson's ratio, a certain amount of double-helix fibers are doped to prepare the concrete, and the doped double-helix fibers (meeting a certain doping ratio) can effectively control non-structural cracks of the concrete, so that the double-helix fiber concrete has an excellent reinforcing effect when being compared with the traditional fiber concrete. In addition, by utilizing a counter-flow principle or a transverse flow principle, a rotary mixing agitator is adopted and has unexpected advantages for mixing of the raw materials, particularly steel fibers, and the performance of the final product can be greatly improved.

Description

technical field [0001] The invention relates to concrete prepared by using synthetic double helix fibers with negative Poisson's ratio effect and a preparation method thereof, belonging to the technical field of fiber reinforced concrete. Background technique [0002] Concrete is one of the most important civil engineering materials today. It is composed of cementitious materials, granular aggregates (also known as aggregates), water, and additives and admixtures added when necessary, prepared in a certain proportion, uniformly stirred, densely formed, cured and hardened. artificial stone. Concrete has the characteristics of rich raw materials, low price and simple production process, so its consumption is increasing. At the same time, it has the characteristics of wide range of concrete strength grades. These characteristics make it widely used, not only in various civil engineering, but also in shipbuilding, machinery industry, marine development, geothermal engineering...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B16/06C04B14/38C04B14/42D02G3/04D02G3/16D02G3/18D02G3/32
CPCC04B20/0068C04B28/04C04B2201/50C04B2201/52D02G3/04D02G3/16D02G3/18D02G3/328D10B2101/12C04B18/08C04B18/146C04B2103/0068C04B14/06C04B2103/302C04B16/06C04B14/386C04B14/42
Inventor 蒋金洋王立国谷业含刘志勇王凤娟陈桢泽武胜萍
Owner SOUTHEAST UNIV
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