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Low-intensity groove concrete produced by using red brick construction wastes and construction technology of low-intensity groove concrete

A construction waste and concrete technology, applied in construction, infrastructure engineering, roads, etc., can solve the problems of unfavorable manual excavation and the difficulty of effective compaction of backfill materials.

Inactive Publication Date: 2017-05-24
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is: 1. Provide a kind of new material that fully utilizes construction waste to produce, broaden the new way of recycling construction waste; 2. Solve the backfill construction difficult problem that backfill material is difficult to be effectively compacted in the backfill construction of some parts 3. It is more important to solve the current situation that is not conducive to manual excavation after backfilling the trench, reduce unnecessary waste of resources in municipal engineering, and make full use of construction waste of various specifications

Method used

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  • Low-intensity groove concrete produced by using red brick construction wastes and construction technology of low-intensity groove concrete
  • Low-intensity groove concrete produced by using red brick construction wastes and construction technology of low-intensity groove concrete
  • Low-intensity groove concrete produced by using red brick construction wastes and construction technology of low-intensity groove concrete

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specific Embodiment approach

[0083] Due to pipeline protection and narrow building boundaries, large-scale compaction machines cannot be used for backfilling construction of road trenches in a certain city, and the project requires excavation in the later stage. The low-strength trench concrete that utilizes the production of red brick construction waste provided by the invention is used as the backfill material, and the specific implementation method is as follows:

[0084] Construction materials: The cement used is ordinary Portland cement with a strength grade of 42.5R; the recycled construction waste aggregate is produced by a recycling plant, and the moisture content of the recycled coarse material is 3%, and the moisture content of the recycled fine material is 3%, which meets the above recycling requirements. Aggregate technical requirements; fly ash is Class F Class I, with a moisture content of 2%, and its quality complies with national technical standards; water is potable tap water.

[0085] co...

Embodiment 2

[0094] A road in a certain city has a subsidence of the pavement and needs to be backfilled. The low-strength trench concrete produced by the invention using construction waste containing red bricks is used as the backfill material. The specific implementation is as follows:

[0095] Construction materials: The cement used is ordinary Portland cement with a strength grade of 42.5R; the recycled construction waste aggregate is produced by a recycling plant, and the moisture content of the recycled coarse material is 4%, and the moisture content of the recycled fine material is 4%. Aggregate technical requirements; fly ash is class F class Ⅲ, moisture content is 5%, and its quality is in line with national technical standards; water is potable tap water.

[0096] construction process:

[0097] S1. Clean up the foundation pit: remove the debris, floating soil and other sundries in the foundation pit, and tamp and level it, and cut the edge parts neatly.

[0098] S2. Construction...

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Abstract

The invention discloses a low-intensity groove concrete produced by using red brick construction wastes and a construction technology of the low-intensity groove concrete. The construction wastes generated in the city construction process are utilized for recycling, and the low-intensity groove concrete is prepared by stirring a construction waste recycled coarse material, a construction waste recycled fine material, cement, an admixture and water. Through strict classification and management of the specifications and the quality of construction waste recycled products, various construction waste recycled aggregates with various specifications are fully utilized by the materials, meanwhile, the technical requirements of pipe canal backfilling are met, and the mechanical strength of the low-intensity concrete after being hardened is adjusted according to the engineering requirements. A new way for recycling the construction wastes is expanded, the backfilling construction problem that backfilling materials in backfilling construction of some parts cannot be easily compacted effectively is solved, more importantly, the problem that artificial excavation is not facilitated after pipe canal backfilling at present is solved, unnecessary waste resources in municipal engineering are reduced, and meanwhile, the construction wastes with various specifications are fully utilized.

Description

technical field [0001] The invention discloses a new type of civil engineering material, specifically a low-strength concrete specially used for backfilling trenches produced by construction waste containing red bricks, and is suitable for backfilling of retaining walls, backfilling of bridges and culverts, Road widening subgrade backfill, urban road pipe trench backfill, inspection well surrounding backfill, underground engineering and narrow building foundation pit backfill and other projects. Background technique [0002] In the past two decades, with the rapid development of my country's economy and the continuous acceleration of urban expansion, a large number of old buildings or roads and bridges have been demolished, resulting in a large amount of construction waste. According to incomplete statistics, my country's annual construction waste is about 40 million tons, of which 13.6 million tons are waste concrete structure construction waste, accounting for about one-th...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/16E02D17/12E01C3/00
CPCC04B18/16C04B28/04C04B2201/50E01C3/00E02D17/12C04B22/002C04B18/08Y02W30/91
Inventor 张金喜王博
Owner BEIJING UNIV OF TECH
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