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Recycled aggregate concrete and application thereof in retaining wall construction

A recycled aggregate and concrete technology, which is applied in artificial islands, water conservancy projects, infrastructure projects, etc., can solve the problems of high cost and consumption of sand and gravel, and achieve the effect of compact structure, reduced consumption, and reduced construction costs

Inactive Publication Date: 2020-10-02
广西建工集团海河水利建设有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, retaining walls are generally formed by using concrete, stones, sand and other raw materials through mortar or dry laying. The cost is relatively high, and a large amount of non-renewable resources such as sand and gravel are consumed.

Method used

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  • Recycled aggregate concrete and application thereof in retaining wall construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A recycled aggregate concrete, the content of each component in each concrete: 339kg of cement, 589kg of natural sand with a fineness modulus of 2.2-3.0, 412kg of 5-20mm recycled aggregate, 412kg of 20-40mm recycled aggregate , 550kg of 40-80mm recycled aggregate and 29kg of reinforcing agent, and control the water-cement ratio between 0.48.

[0026] The regenerated aggregate has also undergone modification treatment; the specific steps of the modification treatment are: put the regenerated aggregate into a citric acid solution with a mass concentration of 6% and soak for 5 hours, wash it with water, and then put it into The modified solution made of redispersible powder, mica powder and dimethylsilyl clathrate polysilsesquioxane with a mass ratio of 3:6:1 was soaked for 1.5h, and the solid content of the modified solution was 15 %, dry it to complete the modification of the recycled aggregate.

[0027] The reinforcing agent includes the following raw materials in part...

Embodiment 2

[0029] A recycled aggregate concrete, the content of each component in each concrete: 326kg of cement, 524kg of natural sand with a fineness modulus of 2.2-3.0, 489kg of 5-20mm recycled aggregate, 425kg of 20-40mm recycled aggregate , 615kg of 40-80mm recycled aggregate and 32kg of reinforcing agent, and control the water-cement ratio between 0.5.

[0030] The regenerated aggregate has also undergone modification treatment; the specific steps of the modification treatment are: put the regenerated aggregate into a citric acid solution with a mass concentration of 8% and soak for 3 hours, wash it with water, and then put it into The modified solution made of redispersible powder, mica powder and dimethylsilyl clathrate polysilsesquioxane with a mass ratio of 3:5:2 was soaked for 2 hours, and the solid content of the modified solution was 18%. , and dried, the modification of the recycled aggregate is completed.

[0031] The reinforcing agent includes the following raw materials...

Embodiment 3

[0033] A recycled aggregate concrete, the content of each component in each concrete: 278kg of cement, 563kg of natural sand with a fineness modulus of 2.2-3.0, 424kg of 5-20mm recycled aggregate, 465kg of 20-40mm recycled aggregate , 555kg of 40-80mm recycled aggregate and 33kg of reinforcing agent, and control the water-cement ratio between 0.52.

[0034] The regenerated aggregate has also undergone modification treatment; the specific steps of the modification treatment are: put the regenerated aggregate into a citric acid solution with a mass concentration of 10% and soak for 4 hours, wash it with water, and then put it into The modified solution made of redispersible powder, mica powder and dimethylsilyl clathrate polysilsesquioxane with a mass ratio of 4:7:3 was soaked for 1.5h, and the solid content of the modified solution was 13 %, dry it to complete the modification of the recycled aggregate.

[0035] The reinforcing agent includes the following raw materials in par...

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Abstract

The invention discloses recycled aggregate concrete and application thereof in retaining wall construction. Each cubic meter of concrete comprises 250 kg to 350 kg of cement, 500 kg to 600 kg of natural sand, 400 kg to 500 kg of recycled aggregate with a size of 5 mm to 20 mm, 400 kg to 500 kg of recycled aggregate with a size of 20 mm to 40 mm, 500 kg to 650 kg of recycled aggregate with a size of 40 mm to 80 mm and 25 kg to 35 kg of a reinforcing agent. The water cement ratio is controlled to be 0.40 to 0.55. A modification method of the recycled aggregate comprises the following steps: soaking the recycled aggregate in a citric acid solution, cleaning with water, soaking in a modification solution prepared from redispersible powder, mica powder and dimethylsilyl polyhedral oligomeric silsesquioxane, and airing to complete the modification of the recycled aggregate. Recycled aggregate is modified and then used as a raw material of a retaining wall; recycling of recycled concrete aggregate resources can be achieved, consumption of non-renewable resource gravel is reduced, the construction cost of the retaining wall is reduced, good economic benefits, social benefits and ecologicalbenefits are achieved, the overall structural stability, strength and the like of the retaining wall can be improved, and the trend of developing the green and environment-friendly building industryis met.

Description

technical field [0001] The invention belongs to the technical field of building construction, in particular to recycled aggregate concrete and its application in retaining wall construction. Background technique [0002] With the rapid advancement of urbanization in our country, a large amount of construction waste is produced, which not only takes up space, but also pollutes the environment. Common construction waste includes muck, waste concrete and bricks, etc. Due to the heterogeneity and quality of construction waste, it is difficult to effectively utilize waste. Most of the construction waste is transported to the suburbs or around the city for simple landfill or open storage without any treatment, which not only wastes land and resources, but also pollutes the environment; The demand for stone aggregates continues to grow. For a long time, because sand and gravel aggregates are widely available and cheap, they are considered inexhaustible and inexhaustible raw mater...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B20/02C04B24/38E02D29/02E02D15/02C04B18/16
CPCC04B28/00C04B40/0039C04B20/023E02D29/0275E02D15/02C04B2201/50Y02W30/91
Inventor 闫志勇袁小军刘祥喜莫开生韦魏陈超黄炜雄莫大源黄文基邓达和梁福明
Owner 广西建工集团海河水利建设有限责任公司