Road pipe trench quick backfill material produced with building wastes and construction technology thereof

A technology for construction waste and pipe trenches, which is applied in the field of low-strength concrete, and can solve problems such as unfavorable manual excavation and difficult backfilling materials

Pending Publication Date: 2018-02-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3. Solve the backfill construction problem that the backfill material is not easy to be effectively compacted in some parts of the backfill construction; 4. Solve the current situation that the backfil

Method used

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  • Road pipe trench quick backfill material produced with building wastes and construction technology thereof
  • Road pipe trench quick backfill material produced with building wastes and construction technology thereof

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Experimental program
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Effect test

specific Embodiment approach

[0087] 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. At the same time, due to traffic conditions, traffic needs to be opened as soon as possible. Adopt the quick backfill material of urban road trench that utilizes construction waste production factory to mix type provided by the present invention as backfill material, and specific implementation is as follows:

[0088] 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 stan...

Embodiment 2

[0098] There is a road surface collapse in a certain urban road, which needs to be backfilled. The urban road pipe ditch fast backfill material provided by the invention is used as the backfill material, and the specific implementation method is as follows:

[0099] 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.

[0100] construction process:

[0101] 1. Clean up the foundation pit: remove the dross, floating soil and other sundries in the foundation pit, and tamp and level it, and the edge parts are cut neatly.

[0102] 2. Construction machinery: 2 man...

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Abstract

The invention discloses a road pipe trench quick backfill material produced with building wastes and a construction technology thereof. The backfill material is prepared by mixing a building waste renewable coarse material, a building waste renewable fine material, cement, sprayed concrete coagulator shrinkage reducing agent, admixture and water. Building waste renewable products are classified and managed strictly in specification and quality, and are treated with other engineering technologies, so that the material fully utilizes building waste renewable aggregates of various specifications,and meets the technological requirements of pipe trench backfill and requirement of quick setting and hardening at the same time; the hardened material is adjusted in mechanical strength according toengineering need, 2h strength adjustment range is 0.2-1.0MPa, and 28d strength adjustment range is 1.0MPa-6.0MPa. The material utilizes building waste renewable materials generated in city construction to the maximum degree and is quick hardening, early strengthening low-strength concrete suitable for backfilling of city road pipe trenches and grooving.

Description

technical field [0001] The invention relates to a civil engineering material, which is a kind of low-strength concrete produced by using construction waste and specially used for backfilling urban road pipe trenches. Background technique [0002] In recent years, road subsidence accidents in major cities in my country have occurred frequently, causing a large amount of economic and property losses, and causing widespread concern in the society. The impact of road subsidence accidents on cities is not limited to the traffic inconvenience caused by road subsidence, but is often accompanied by damage and interruption of various communication, drainage, gas transmission, and electric power infrastructures, which have a large impact. Therefore, how to quickly deal with road surface subsidence accidents, especially how to quickly backfill the road surface subsidence accidents, has become an urgent problem for road management departments to solve. However, ordinary backfill materi...

Claims

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Application Information

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IPC IPC(8): C04B28/04E02D17/18
CPCC04B28/04C04B2111/00663C04B2201/50E02D17/18C04B18/167C04B2103/12C04B18/08C04B22/002
Inventor 张金喜王博刘俊甫
Owner BEIJING UNIV OF TECH
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