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Mixed basalt fiber reinforced concrete and preparation method thereof

A technology of basalt fiber and reinforced concrete, which is applied in the field of building materials, can solve the problems of reducing the compressive strength of concrete, the compressive strength of concrete, and the enhancement effect of flexural strength is not very obvious, and achieves improved splitting tensile strength and good application. Prospects, Inhibiting Effects of Emergence and Development

Active Publication Date: 2019-02-22
HENAN VOCATIONAL & TECHN COLLEGE OF COMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that chopped basalt fibers can improve the durability of concrete, and have a good inhibitory effect on the development of concrete micro-cracks, but the effect on the compressive strength and flexural strength of concrete is not obvious, even with the fiber The increase of the dosage will also reduce the compressive strength of concrete

Method used

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  • Mixed basalt fiber reinforced concrete and preparation method thereof
  • Mixed basalt fiber reinforced concrete and preparation method thereof
  • Mixed basalt fiber reinforced concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0029] In other embodiments, a method for preparing hybrid basalt fiber reinforced concrete is disclosed, the method comprising the following steps: (a), stirring the aggregate and gel material evenly to obtain an aggregate mixture; (b), Add chopped basalt fiber bundles and chopped basalt fibers into the aggregate mixture, stir, gradually add the mixed liquid during the stirring process, and continue stirring evenly to obtain hybrid basalt fiber reinforced concrete. Further, the preparation method of hybrid basalt fiber reinforced concrete comprises the following steps: (a), stirring aggregate and gel material for 1 to 3 minutes, and stirring evenly to obtain aggregate mixture; (b), mixing chopped basalt fiber Add bundles and chopped basalt fibers into the aggregate mixture and stir for 1 to 3 minutes. During the stirring process, gradually add water and water reducer mixture, continue stirring for 2 to 5 minutes, and stir evenly to obtain hybrid basalt fiber reinforced concret...

Embodiment 1

[0035] In Example 1, the cubic compressive strength of hybrid basalt fiber reinforced concrete is compared as an example.

[0036] The ingredients and components of the concrete are as follows, the water-cement ratio is 0.34, the cement strength is 42.5, and other mix ratios are shown in Table 1.

[0037] The size of the cube test block used in this embodiment is 150mm×150mm×150mm. There are three test pieces in each group. A total of 7 groups of experiments are carried out. The components of each group of experiments are shown in Table 2.

[0038] Table 1 Concrete mix ratio

[0039]

[0040] Table 2 Example 1 cube compressive strength test component list

[0041]

[0042] L1-0 is a control experiment, the dosage of chopped basalt fiber bundles and chopped basalt fibers is 0. L1-1 to L1-6 are experiments with different chopped basalt fiber bundles and chopped basalt fiber content, the table lists the chopped basalt fiber bundle content, chopped basalt fiber content, an...

Embodiment 2

[0045] In Example 2, an exemplary comparison is made on the splitting tensile strength of hybrid basalt fiber reinforced concrete.

[0046] Concrete benchmark mix ratio is the same as in Example 1.

[0047] The cube test block used in this embodiment has a size of 150mm×150mm×150mm. There are three test pieces in each group. A total of 7 groups of experiments are carried out. The components of each group of experiments are shown in Table 3.

[0048] Table 3 embodiment 2 cube splitting tensile strength test component list

[0049]

[0050] L2-0 is a control experiment, the dosage of chopped basalt fiber bundles and chopped basalt fibers is 0. L2-1 to L2-6 are the experiments of different chopped basalt fiber bundles and chopped basalt fiber content, the table lists the chopped basalt fiber bundle content, chopped basalt fiber content, hybrid basalt fiber reinforced concrete test blocks The growth rate of splitting tensile strength and splitting compressive strength.

[00...

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Abstract

The invention discloses mixed basalt fiber reinforced concrete. The mixed basalt fiber reinforced concrete comprises chopped basalt fiber bundles, and the volume content of the chopped basalt fiber bundle is 0.1-0.8%; and the volume content of chopped basalt fibers is 0.1-0.2%. The chopped basalt fiber bundles are better matched with aggregate with the conventional size, thus the great compactnessis formed between the chopped basalt fiber bundles and a concrete matrix, and the bonding performance between the chopped basalt fiber bundles andwith the concrete is improved greatly; gaps between the aggregate and as well as gaps between the aggregate and the chopped basalt fiber bundles can be better filled with the chopped basalt fibers, thus generation and development of concrete microcracksare inhibited, the effects of enhancing strength and toughness are achieved, and the basic mechanical properties, such as compression resistance, splitting tensile resistance and flexural resistance,of the concrete are improved; and according to the mixed basalt fiber reinforced concrete, the compressive strength is improved by 15% or above, the flexural strength is improved by 1770% or above, the splitting tensile strength is improved by 110% or above, the durability of the concrete is improved, and good application prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a hybrid basalt fiber reinforced concrete and a preparation method thereof. Background technique [0002] Concrete is a man-made brittle material with high compressive strength and has been widely used. However, concrete has low tensile strength and is easy to crack, which affects the reliability and durability of concrete engineering. Fiber concrete can control the cracks of concrete through fibers, increase the tensile strength of concrete, and improve the comprehensive performance of concrete. Basalt fiber (BF) is a new type of fiber with extremely high tensile strength of over 3000MPa, strong corrosion resistance and high temperature resistance, which can not only improve the mechanical properties of concrete, but also improve the durability of concrete. Therefore, basalt fiber has become a hot spot in domestic research. Studies have shown that chopp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02
CPCC04B28/02C04B2201/50C04B14/02C04B14/06C04B14/46C04B24/18C04B2103/302
Inventor 邵景干平自要王俊超马帅王琪陈红奎马波邵凤菊郝向东荆运蕾潘二强王红康
Owner HENAN VOCATIONAL & TECHN COLLEGE OF COMM
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