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Structured cemented particulate material and preparation method thereof

A technology of cementing particles and cementing materials, which is used in infrastructure engineering, soil protection, construction, etc., can solve the problem of loss of soil consolidation drainage channels around the gravel pile, the compactness of the cemented body cannot meet the needs of the project, and the formation of Overall mechanical properties and other issues, to achieve the effect of large plastic deformation, small amount of engineering, and improved strength

Active Publication Date: 2018-09-18
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, in many projects, due to the inability to control the compactness of the cemented body after grouting, the compactness of the cemented body cannot meet the needs of the project, such as the foundation reinforcement project of gravel piles. Filling the gaps of the gravel piles completely densely makes the gravel piles lose their function as the drainage channel for the consolidation of the surrounding soil, and the cement formed by grouting and the surrounding granular materials do not form a material with overall mechanical properties.

Method used

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  • Structured cemented particulate material and preparation method thereof
  • Structured cemented particulate material and preparation method thereof

Examples

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preparation example Construction

[0039] The preparation method of the structured cementitious granular material 100 according to the embodiment of the present invention includes the following steps:

[0040] S1: Carry out tests according to the cementing type of the cementing granular material 2 required by the design to determine the fluidity and viscosity of the self-compacting cement-based cementing material 3;

[0041] S2: accumulation of granular material 1;

[0042] S3: Determine the cemented area of ​​the granular material 1 and the grouting amount of the self-compacting cement-based cementitious material 3 required to form the cemented granular material 2;

[0043] S4: filling the cementing area with self-compacting cement-based cementing material 3 , the self-compacting cement-based cementing material 3 binds the granular material 1 on the flow path into cemented granular material 2 . It is to be understood that, in the structured cementitious granular material 100 prepared by the preparation method...

Embodiment 1

[0051] Embodiment 1: as figure 1 As shown, the construction result of this embodiment is a contact-type structured cemented granular material 100, which can be applied to gravel pile reinforcement projects, and the structured cemented technology can be applied to rockfill dams, slopes and foundations, etc. Reinforcement project, the particle size of granular material is 0.01m-0.1m crushed stone, self-compacting cement-based cement material 3 adopts self-compacting cement paste, the expansion degree of self-compacting cement paste is 290mm, V funnel value is 1.9s, pouring The formed cemented granular material 2 only forms cementation in the local area of ​​the particle contact point, and the cemented granular material maintains the original grain skeleton structure and pore structure of the granular material, and has high water permeability.

[0052] Concrete preparation steps are as follows:

[0053] S1: Conduct tests according to the design requirements to determine that the...

Embodiment 2

[0057] Embodiment 2: as figure 2 As shown, the construction result of this embodiment is a dense structured cemented granular material 100, which can be applied to rockfill seawall projects, and the particle size of the granular material is 0.3m-1m rockfill , the self-compacting cement-based cementing material 3 adopts self-compacting concrete, the expansion degree of self-compacting concrete is 680 mm, the slump is 260 mm, and the V funnel value is 12 s. The size of the cemented granular material 2 is 3m-5m. A single cemented granular material 2 has the performance of a concrete block, and multiple cemented granular materials 2 form a structured cemented granular material 100 with surrounding rockfill materials.

[0058] Concrete preparation steps are as follows:

[0059] S1: Carry out tests according to the design requirements to determine that the self-compacting concrete that forms the dense cemented granular material 2 has a degree of expansion of 680mm, a slump of 260m...

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Abstract

The invention discloses a structured cemented particulate material and a preparation method thereof, the structured cemented particulate material comprises a granular material and a cemented granularmaterial, and the granular material is at least one of a rockfill material, a crushed stone material, sand gravel and a soil and stone material. The cemented granular material is obtained by filling aself-compacting cement-based cementing material into gaps of the granular material. Since the structured cemented particulate material comprises the granular material in the form of a granular body and a cementation body cemented granular material, the ability of the granular material to adapt to deformation is maintained, and the structured cemented particulate material has a large plastic deformation advantage. The cemented granular material is obtained by filling the granule gaps of the granular material with the self-compacting cement-based cementing material, the strength, rigidity and deformation modulus of the granular material can be improved, and by control of the fluidity, viscosity and pouring amount of the self-compacting cement-based cementing material, different cementationtypes, shapes and volumes of cemented granular materials can be obtained, and are suitable for different engineering conditions.

Description

technical field [0001] The invention relates to the field of foundation engineering reinforcement, in particular to a structured cemented granular material and a preparation method thereof. Background technique [0002] The dam body and foundation, damming body, diseased slope, deep foundation pit, seawall and foundation of dangerous rockfill dams and earth-rockfill dams are usually filled with inorganic grouting materials (mainly cement slurry) or chemical grouting materials (organic polymer materials) Mainly) for reinforcement, through the hydration reaction of cement slurry, the non-cohesive granular materials are bonded into a cemented body with overall performance, and the physical and mechanical properties of the original earth and rock materials are improved. The grouting reinforcement method has the advantages of simple construction technology and small engineering quantity. At the same time, the inorganic grouting material mainly composed of cement has the advantage...

Claims

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Application Information

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IPC IPC(8): C04B28/00E02D3/08
CPCC04B28/00E02D3/08C04B14/02
Inventor 金峰周虎王卫张嘎周元德徐艳杰潘坚文
Owner TSINGHUA UNIV
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