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A flexible material for concrete modification and its preparation process and application

A flexible material, concrete technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of concrete cracks or fractures, large elastic modulus, and high rigidity of concrete, and achieve reuse, Easy to store, easy to process and make

Active Publication Date: 2015-10-28
THE FOURTH ENG CO LTD OF CHINA RAILWAYNO 20 BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another example is the concrete filled in the box girder of a large cable-stayed bridge and its pavement concrete. Due to the large elastic modulus, high rigidity, and strong brittleness of the concrete, it cannot withstand the huge shock wave of the vehicle for a long time, so that the concrete cracks or cracks appear prematurely. fracture

Method used

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  • A flexible material for concrete modification and its preparation process and application
  • A flexible material for concrete modification and its preparation process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this example,

[0031] In this example, the composition of the prepared flexible material by mass is: 35% rubber powder, 35% colloidal particles, 1% polypropylene fiber, 5% fly ash, and 24% mineral admixture. The mineral admixture is mineral powder. The rubber powder is a solid powder obtained by removing the zinc stearate contained on the surface of the rubber powder by a strong alkali solution, and the colloidal particle is a solid obtained by removing the zinc stearate contained on the surface of the rubber particles by a strong alkali solution particles. During actual preparation, the content of each component in the flexible material can be adjusted accordingly according to specific needs.

[0032]In actual preparation, the mineral admixture may also be slag powder.

[0033] In this embodiment, the particle size of the rubber powder is 40 mesh to 200 mesh, the particle size of the rubber particles is 0.45 mm to 5 mm, the length of the polypropylene fiber is 2...

Embodiment 2

[0071] In this example, the composition, proportion and preparation process of the prepared flexible material are the same as those in Example 1.

[0072] In this example, the difference between the prepared semi-rigid concrete and Example 1 is that the quality of the replaced fine aggregate is 30% of the total mass of the fine aggregate.

[0073] In this embodiment, the remaining components and proportions of the prepared semi-rigid concrete are the same as those in Embodiment 1.

[0074] In this example, using figure 1 The preparation process shown is for the preparation of semi-rigid concrete, and the preparation process steps and process parameters adopted are the same as those in Example 1.

[0075] In the present embodiment, after the preparation of the semi-rigid concrete is completed, the slump and bulk density of the prepared concrete and the compressive strength of the constructed concrete structure are tested. The test results are as follows: the slump is 120mm, an...

Embodiment 3

[0077] In this example, the composition, proportion and preparation process of the prepared flexible material are the same as those in Example 1.

[0078] In this example, the difference between the prepared semi-rigid concrete and Example 1 is that the quality of the replaced fine aggregate is 45% of the total mass of the fine aggregate.

[0079] In this embodiment, the remaining components and proportions of the prepared semi-rigid concrete are the same as those in Embodiment 1.

[0080] In this example, using figure 1 The preparation process shown is for the preparation of semi-rigid concrete, and the preparation process steps and process parameters adopted are the same as those in Example 1.

[0081] In the present embodiment, after the preparation of the semi-rigid concrete is completed, the slump and bulk density of the prepared concrete and the compressive strength of the constructed concrete structure are tested. The test results are as follows: the slump is 130mm, an...

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Abstract

The invention discloses a flexible material used for modifying concrete as well as a preparation process and application of the flexible material. The flexible material comprises the following components by mass percent: 30%-40% of rubber powder, 30%-40% of rubber particles, 0.5%-1.5% of polypropylene fibers, 3%-8% of coal ash and 20%-28% of mineral admixture, wherein the mineral admixture is mineral powder or mineral slag powder, and zinc stearate on the surfaces of the rubber particles and the rubber powder is removed through strong base solution. The preparation process of the flexible material comprises the following steps of: firstly preparing the rubber powder and the rubber particles, and secondly uniformly mixing. The application of the flexible material is as follows: a part of fine aggregate of common concrete is replaced by the flexible material to prepare semi-rigid concrete by adopting an equal mass replacement method. The preparation process is simple in steps, simple and convenient to operate, low in input cost and good in use effect. The semi-rigid concrete prepared by the flexible material can make up defects of small deformation, large fragility, low tensile strength, and the like of the existing common concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete preparation, and in particular relates to a flexible material for concrete modification and its preparation process and application. Background technique [0002] With the rise of the modern construction industry, concrete, an engineering material, is widely used in different types of civil engineering construction. Since the biggest feature of concrete materials is high compressive strength and low tensile strength, concrete materials are mainly used for load-bearing structure. However, with the development of engineering technology, concrete, a rigid material with high strength and small deformation, gradually shows its limitations. Nowadays, there is a special desire for a semi-rigid material between rigid materials and flexible materials. , that is, a concrete material appears, which not only has the same strong load-bearing capacity as reinforced concrete (or slightly lower strength require...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/30C04B18/22
CPCY02W30/91Y02W30/96
Inventor 汪君睿李强黄小军仲维玲周玉兵刘金明
Owner THE FOURTH ENG CO LTD OF CHINA RAILWAYNO 20 BUREAU GRP