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Self-compacting road backfill material produced by sawing stone mud and its construction method

A self-compacting and sawing mud technology, which is applied in filling, construction, etc., can solve the problems of complex production technology, not very wide application area, high production cost, etc., and achieve the effect of wide application range, wide application range and simple construction

Active Publication Date: 2020-12-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, great progress has been made in the reuse of granite powder at home and abroad, but the production cost is high, the production technology is complicated, and the application area is not very wide.

Method used

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  • Self-compacting road backfill material produced by sawing stone mud and its construction method
  • Self-compacting road backfill material produced by sawing stone mud and its construction method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0059] The non-motor vehicle lane of a city road collapsed, because the space was narrow, and large compaction machines could not be used for compaction. Adopt the road backfill material that utilizes the stone material sawn mud production provided by the present invention to carry out backfill, the specific implementation method is as follows:

[0060] Construction materials: The cement used is Diamond PC42.5R composite Portland cement; the backfill fine material is machine-made sand, and the stone sawn mud is taken from the open-air storage yard with a moisture content of 0.6%; the water is potable tap water.

[0061] construction process:

[0062] 1. Clean up the debris, garbage and other sundries around the drainage well.

[0063] 2. Determine the construction mix ratio. Cement 146kg / m 3 , stone sawing mud 219kg / m 3 , machine-made sand 1462kg / m 3 , water 328kg / m 3 .

[0064] 3. On-site mixing. A small concrete mixer is used to mix stone sawn mud road backfill mater...

Embodiment 2

[0069] The surrounding area of ​​a road drainage well in a certain city has subsided. Due to the narrow space, large compaction machines cannot be used for compaction. Adopt the road backfill material that utilizes the stone material sawn mud production provided by the present invention to carry out backfill, the specific implementation method is as follows:

[0070] Construction materials: the cement used is Drill brand PC32.5R composite Portland cement; the backfill fine material is construction waste fine aggregate with a moisture content of 0.06%; Drinkable tap water.

[0071] construction process:

[0072] 1. Clean up the debris, garbage and other sundries around the drainage well.

[0073] 2. Determine the construction mix ratio. Cement 145kg / m 3 , stone sawing mud 290kg / m 3 , construction waste recycled coarse material 1449kg / m 3 , water 527kg / m 3 .

[0074] 3. On-site mixing. A small concrete mixer is used to mix stone sawn mud road backfill materials, and the...

Embodiment example 3

[0079] The backfilling construction of the bridge and culvert platform back of a certain expressway has a narrow space, and the compacting equipment cannot enter. The road backfilling material produced by utilizing stone sawn mud provided by the present invention is adopted, and the specific implementation method is as follows:

[0080] Construction materials: the cement used is Drill brand PC42.5R composite portland cement; the backfill fine material is construction waste fine material with a moisture content of 0.5%; the stone sawn mud is taken from an open storage yard with a moisture content of 0.6%; water is Drinkable tap water.

[0081] construction process:

[0082] 1. Clean up the debris, garbage and other debris around the back of the bridge and culvert abutment.

[0083] 2. Determine the construction mix ratio. Cement 143kg / m 3 , stone sawing mud 214kg / m 3 , machine-made sand 1425kg / m 3 , water 374kg / m 3 .

[0084] 3. On-site mixing. A small concrete mixer is...

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Abstract

The invention discloses a self-compacting road backfill material produced by using sawed stone mud and a construction method of the self-compacting road backfill material. The backfill material is prepared by mixing the sawed stone mud, cement, admixture and water. Through analysis of the performance of the raw materials, the characteristic of smoothness of the surface of the backfill material isunderstood and made full use of, no increase of the bleeding rate is needed under the same water consumption, and meanwhile the fluidity is improved, so that the work and workability of the self-compacting backfill material are met. The compressive strength of the hardened self-compacting backfill material meets the construction requirements, wherein the strength after one day of hardening is0.34-0.45 MPa, the strength after 7 days of hardening is 1.0-1.8 MPa, and the strength after 28 days of hardening is 2.4-3.6 MPa; the self-compacting road backfill material is suitable for a narrow area ofhighway and municipal works or projects during which vibration and compaction construction cannot be conducted by using large-scale machinery.

Description

technical field [0001] The invention relates to a road engineering material, which is a low-strength self-compacting road backfill material produced by using stone sawn mud instead of fly ash, and is suitable for narrow areas in highways and municipal engineering or where large machinery cannot be used for vibration compaction Construction works. Background technique [0002] In recent years, with the rapid development of my country's economy, the production volume, import and export volume and consumption of stone resources have increased significantly. The rich mine resources have driven the economic and social development of the region, but a large number of Solid powdery waste, different stone processing techniques and different stone processing products produce different types of waste, but the general initial state is a mixture of micro-stone powder and water, similar to a silt state, so it is commonly known as stone sawing mud. The stone industry is a resource process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04E02D17/18
CPCC04B28/04C04B2111/0075E02D17/18E02D2300/00C04B18/12C04B14/06
Inventor 张金喜王美霞王琳王建刚
Owner BEIJING UNIV OF TECH
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