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Fiber-reinforced renewable concrete and preparation method thereof

A technology of recycled concrete and fiber reinforcement, applied in the field of recycled concrete, can solve the problems of reduced performance of recycled aggregate, unsatisfactory degree of improvement, small amount of recycled aggregate added, etc., and achieves the effect of excellent performance

Inactive Publication Date: 2018-09-04
YANGZHOU POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with natural aggregates, the performance of recycled aggregates is greatly reduced, which leads to insufficient performance of newly prepared concrete. The usual solution is to add polypropylene fibers, rubber particles, etc. for modification to enhance mechanical properties. Performance, but the degree of improvement is still not ideal, and the amount of recycled aggregate added is also small

Method used

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  • Fiber-reinforced renewable concrete and preparation method thereof
  • Fiber-reinforced renewable concrete and preparation method thereof
  • Fiber-reinforced renewable concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The formula of fiber reinforced recycled concrete is as follows (by weight):

[0034]

[0035]

[0036] Among them, in the composition of recycled coarse aggregate, the mass ratio of recycled coarse aggregate made from the first to fourth types of waste concrete is 3:10:4:2; in the composition of recycled fine aggregate, the mass ratio of recycled fine aggregate is from the first to fourth types of waste concrete. The mass ratio of recycled fine aggregate made from the fourth type of waste concrete is 1:5:8:2; the composite fiber is composed of polypropylene fiber and glass fiber in a mass ratio of 10:3.

[0037] Preparation method: The waste concrete is crushed with a crusher and sieved to obtain recycled coarse aggregate and recycled fine aggregate. The particle size range of the recycled coarse aggregate is 6-18 μm, and the particle size range of the recycled fine aggregate is 2- 4 μm. Weigh each raw material in the formula amount, add polypropylene fiber, san...

Embodiment 2

[0039] The formula of fiber reinforced recycled concrete is as follows (by weight):

[0040]

[0041] Among them, in the composition of recycled coarse aggregate, the mass ratio of recycled coarse aggregate made from the first to fourth types of waste concrete is 3:10:4:2; in the composition of recycled fine aggregate, the mass ratio of recycled fine aggregate is from the first to fourth types of waste concrete. The mass ratio of recycled fine aggregate made from the fourth type of waste concrete is 1:5:8:2; the composite fiber is composed of polypropylene fiber, aluminum silicate fiber and glass fiber in a mass ratio of 10:6:3.

[0042] Preparation method: The waste concrete is crushed with a crusher and sieved to obtain recycled coarse aggregate and recycled fine aggregate. The particle size range of the recycled coarse aggregate is 6-18 μm, and the particle size range of the recycled fine aggregate is 2- 4 μm. Weigh each raw material in the formula amount, add composite...

Embodiment 3

[0044] The formula of fiber reinforced recycled concrete is as follows (by weight):

[0045]

[0046] Among them, in the composition of recycled coarse aggregate, the mass ratio of recycled coarse aggregate made from the first to fourth types of waste concrete is 3:10:4:2; in the composition of recycled fine aggregate, the mass ratio of recycled fine aggregate is from the first to fourth types of waste concrete. The mass ratio of recycled fine aggregate made from the fourth type of waste concrete is 1:5:8:2; the composite fiber is composed of polypropylene fiber, aluminum silicate fiber and glass fiber in a mass ratio of 10:6:3; The mineral powder is composed of nano sepiolite and nano kaolin with a mass ratio of 1:3.

[0047] Preparation method: The waste concrete is crushed with a crusher and sieved to obtain recycled coarse aggregate and recycled fine aggregate. The particle size range of the recycled coarse aggregate is 6-18 μm, and the particle size range of the recycl...

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Abstract

The invention discloses fiber-reinforced renewable concrete and a preparation method thereof. The fiber-reinforced renewable concrete is prepared from the following components in parts by weight: 22 to 27 parts of cement, 6 to 8 parts of coal ash, 50 to 54 parts of stones, 50 to 54 parts of renewable coarse aggregates, 40 to 42 parts of fine aggregates, 1 to 3 parts of fibers, 2 to 5 parts of rubber particles, 1 to 2 parts of water reduction agent, and 16 to 20 parts of water. The renewable coarse aggregates are sourced from four waste concrete of different service lives. The invention also discloses a preparation method of the fiber-reinforced renewable concrete. On the basis of improving the basic composition of the renewable aggregates, the composite fibers of a specific ratio and nanomineral powder are added, so that the performance of the concrete is further improved, and the reduction of the concrete performance caused by the use of a great of renewable aggregates (50 percent) can be avoided by virtue of multiple measures.

Description

technical field [0001] The invention relates to recycled concrete, in particular to a fiber-reinforced recycled concrete and a preparation method thereof. Background technique [0002] With the process of industrialization and the high development of society, the demand for concrete is increasing day by day, and at the same time, a large amount of waste concrete waste is produced. How to dispose or utilize waste concrete has become an urgent problem to be solved. And recycled concrete is one of the effective ways. [0003] Recycled concrete refers to the process of crushing, cleaning and grading waste concrete blocks, grading and mixing them according to a certain proportion, partially or completely replacing natural aggregates such as sand and gravel (mainly coarse aggregates), and then adding cement, water, etc. new concrete. Compared with natural aggregates, the performance of recycled aggregates is greatly reduced, resulting in insufficient performance of newly prepare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02
CPCC04B28/02C04B2111/00017C04B2201/50C04B18/08C04B14/02C04B18/167C04B18/22C04B14/042C04B14/106C04B14/42C04B16/0633C04B20/008C04B2103/302C04B14/4656
Inventor 王兵陈丰邵红才许飞
Owner YANGZHOU POLYTECHNIC COLLEGE
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