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Recess backfill material

A technology for empty grooves and stones, which is applied in the field of backfilling materials for empty grooves to achieve the effect of reducing the amount of cement, satisfying stability, and ensuring stability and safety.

Inactive Publication Date: 2018-02-27
CCCC TUNNEL ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing plain concrete cannot achieve this effect.

Method used

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  • Recess backfill material

Examples

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Effect test

Embodiment 1

[0018] A foundation pit partition wall void backfill material, which includes water 210kg / m3; fly ash 210kg / m3; sand 890kg / m3; gravel 992kg / m3; admixture 7kg / m3. Mix the raw materials with a mixer until smooth. The particle size of the sand is less than 5mm, and the particle size of the stone is 5mm to 40mm. The additive is a water reducer.

Embodiment 2

[0020] A foundation pit partition wall void backfill material, which includes water 200kg / m3; fly ash 255kg / m3; sand 900kg / m3; gravel 945kg / m3; admixture 9kg / m3. Mix the raw materials with a mixer until smooth. The particle size of the sand is less than 5mm, and the particle size of the stone is 5mm to 40mm. The admixture is a flocculant.

Embodiment 3

[0022] A foundation pit partition wall backfill material, which includes water 190kg / m3; fly ash 300kg / m3; sand 910kg / m3; stones 900kg / m3; admixture 9kg / m3. Mix the raw materials with a mixer until smooth. The particle size of the sand is less than 5mm, and the particle size of the stone is 5mm to 40mm. The additive is a water reducer.

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Abstract

The invention relates to a recess backfill material for a foundation pit compartment wall. The recess backfill material comprises 190 kg / m<3> to 210 kg / m<3> of water, 210 kg / m<3> to 300 kg / m<3> of coal wash, 890 kg / m<3> to 910 kg / m<3> of sand, 900 kg / m<3> to 992 kg / m<3> of stone and 7 kg / m<3> to 9 kg / m<3> of an additive. According to the recess backfill material, the coal ash is used for replacingthe using amount of cement in concrete, so that the potential activity of coal ash of industrial waste residue is sufficiently utilized, the using amount of cement is reduced, and the construction cost of concrete is reduced.

Description

technical field [0001] The present application relates to a void backfill material. Background technique [0002] In the existing technology, after the trough formation of the sub-warehouse partition wall is completed, the concrete pouring is only carried out to the level of the bottom concrete top. Therefore, there are empty grooves about 32m deep from the surface of the sub-warehouse partition wall, and a large number of empty grooves need to be backfilled. If using Backfilling with plain concrete is difficult and costly to remove in the later excavation process of the foundation pit. However, if it is not backfilled, it will affect the construction of the adjacent groove section, and normal construction cannot be carried out. [0003] Backfilling materials for empty slots must not only meet the requirements for construction compressive strength, but also meet the stability of the wall to ensure that the slot section does not collapse in the early stage of excavation, and ...

Claims

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Application Information

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IPC IPC(8): C04B28/08
CPCC04B28/08C04B2201/50C04B14/06C04B14/02C04B2103/302
Inventor 赵宗智孙建平任军段新建李辉张真张勇
Owner CCCC TUNNEL ENG
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