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Recycled aggregate pervious concrete and preparation method thereof

A technology of permeable concrete and recycled aggregate, applied in the field of concrete, can solve the problems of increasing the manufacturing cost of recycled aggregate permeable concrete, hindering the recycling of recycled aggregate waste, and failing to achieve water permeability coefficient and strength, so as to enhance ductility and improve Brittleness and good water permeability

Inactive Publication Date: 2021-10-15
日照联汇建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they all have expensive raw materials and cumbersome process steps, which greatly increase the manufacturing cost of recycled aggregate permeable concrete to a certain extent, and hinder the waste recycling of recycled aggregate. The resulting permeable concrete has a low permeability coefficient and average strength. It is impossible to balance the permeability coefficient and strength at the same time

Method used

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  • Recycled aggregate pervious concrete and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] A recycled aggregate permeable concrete, prepared from the following raw materials in parts by weight: 100 parts of cement, 400 parts of pretreated recycled aggregate, 50 parts of slag micropowder, 30 parts of fly ash, and 10 parts of toughened modified polypropylene fiber , 5 parts of redispersible latex powder, 3 parts of silane coupling agent, 3 parts of hydroxypropyl methylcellulose, 3 parts of water reducer, 30 parts of water.

[0028] The preparation method of the pretreated regenerated aggregate is as follows: add regenerated aggregate particles, chitosan, sodium oleate and sodium hydroxide into a constant speed mixer according to the mass ratio of 10:1:1:0.5 and stir evenly, and then mix according to the solid-liquid Add 30% ethanol solution at a ratio of 1g:100ml, continue stirring for 1 hour, and then dry to obtain pretreated recycled aggregate.

[0029] The specific surface area of ​​the slag micropowder is 200-350m 2 / kg.

[0030] The preparation method of...

Embodiment 2

[0042] A recycled aggregate permeable concrete, prepared from the following raw materials in parts by weight: 120 parts of cement, 500 parts of pretreated recycled aggregate, 70 parts of slag micropowder, 40 parts of fly ash, and 15 parts of toughened modified polypropylene fiber , 10 parts of redispersible latex powder, 5 parts of silane coupling agent, 5 parts of hydroxypropyl methylcellulose, 4 parts of water reducer, and 50 parts of water.

[0043] The preparation method of the pretreated regenerated aggregate is as follows: add regenerated aggregate particles, chitosan, sodium oleate and sodium hydroxide into a constant speed mixer according to the mass ratio of 10:1:1:0.5 and stir evenly, and then mix according to the solid-liquid Add 30% ethanol solution at a ratio of 1g:100ml, continue stirring for 3 hours, and then dry to obtain pretreated recycled aggregate.

[0044] The specific surface area of ​​the slag micropowder is 200-350m 2 / kg.

[0045] The preparation met...

Embodiment 3

[0057] A recycled aggregate permeable concrete, prepared from the following raw materials in parts by weight: 150 parts of cement, 600 parts of pretreated recycled aggregate, 80 parts of slag micropowder, 50 parts of fly ash, and 20 parts of toughened modified polypropylene fiber , 15 parts of redispersible latex powder, 8 parts of silane coupling agent, 7 parts of hydroxypropyl methylcellulose, 5 parts of water reducer, and 80 parts of water.

[0058] The preparation method of the pretreated regenerated aggregate is as follows: add regenerated aggregate particles, chitosan, sodium oleate and sodium hydroxide into a constant speed mixer according to the mass ratio of 10:1:1:0.5 and stir evenly, and then mix according to the solid-liquid Add 30% ethanol solution at a ratio of 1g:100ml, continue stirring for 3 hours, and then dry to obtain pretreated recycled aggregate.

[0059] The specific surface area of ​​the slag micropowder is 200-350m 2 / kg.

[0060] The preparation met...

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Abstract

The invention discloses recycled aggregate pervious concrete and a preparation method thereof, and belongs to the technical field of concrete. The pervious concrete is prepared from the following raw materials: cement, pretreated recycled aggregate, superfine slag powder, fly ash, toughened modified polypropylene fibers, redispersible latex powder, a silane coupling agent, hydroxypropyl methyl cellulose, a water reducing agent and water. According to the invention, the recycled aggregate is pretreated by chitosan, and then the toughening modified polypropylene fiber is modified by nano silicon dioxide and cetyltrimethylammonium chloride, so that the bonding force between the fiber and recycled aggregate particles is improved, and the strength of the material is greatly improved on the whole. The raw materials are scientifically proportioned, recycled aggregate is used for preparing the pervious concrete, recycling of waste resources is achieved, and the obtained recycled aggregate pervious concrete is high in compressive strength, high in water permeability, high in frost resistance and high in adaptability to the environment and has wide economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a recycled aggregate permeable concrete and a preparation method thereof. Background technique [0002] Recycled permeable concrete is a lightweight porous concrete that is uniformly mixed with cement, aggregate, admixtures and water. The preparation of recycled aggregate permeable concrete is based on the theory of preparing pervious concrete. The aggregate part is made of recycled aggregate or completely replaced by recycled aggregate. The compressive strength and water permeability of recycled aggregate permeable concrete can be balanced through a reasonable mix ratio. Recycled aggregate pretreatment refers to the permeable concrete mixed with part or all of the recycled aggregate after crushing, cleaning and grading waste concrete, mortar, stone, bricks and tiles, etc. . In recycled permeable concrete, the surface of coarse aggregate is covered with a thin laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B38/00C04B111/40
CPCC04B28/02C04B2111/00284C04B2111/40C04B2201/50C04B2111/0075C04B18/16C04B18/141C04B18/08C04B16/0633C04B24/42C04B24/383C04B24/38C04B24/08C04B24/026C04B14/062C04B24/04C04B24/005C04B2103/0057C04B2103/302C04B38/0038
Inventor 匡利君井富磊
Owner 日照联汇建材有限公司
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