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High-performance micro-expansive grouting binder

A micro-expansion and binder technology, which is applied in the field of building materials, can solve the problems of low concrete bond strength, easy delamination and bleeding, and slow strength growth, and achieve the effects of reducing the probability of water permeability, improving water permeability, and increasing compactness

Inactive Publication Date: 2019-08-27
石家庄市易达恒联路桥材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to prepare a micro-expansion grouting binder used in tunnel mold grouting. This grouting material overcomes the shortcomings of traditional cement slurry strength growth slowly, low bonding strength with concrete, and easy layering and bleeding. The grouting material of this invention has the advantages of superfluid self-leveling, fixed water-material ratio, and micro-expansion in the plasticizing stage. protection plays a big role

Method used

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  • High-performance micro-expansive grouting binder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 A combination of high-performance micro-expansion grouting ratio is as follows

[0043] High Belite sulfoaluminate cement 35 parts

[0044] Heavy calcium 5 parts,

[0045] 3 parts mineral admixture,

[0046] Rheological preservative 3 parts

[0047] 6 parts of expansion agent,

[0048] 45 parts of quartz sand,

[0049] 1 part of water reducing agent,

[0050] 0.5 part of retarder,

[0051] 0.1 part of water retaining agent,

[0052] 0.2 parts of early strength agent,

[0053] Shrinkage reducer 0.2 part,

[0054] Thixotropic lubricant 0.2 parts

[0055] Redispersible latex powder 0.3 parts,

[0056] 0.2 part of defoamer,

[0057] Hydrophobic agent 0.1 parts

Embodiment 2

[0058] Example 2 A combination of high-performance micro-expansion grouting ratio is as follows

[0059] High Belite sulphoaluminate cement 38 parts

[0060] Heavy calcium 8 parts,

[0061] 4 parts mineral admixture,

[0062] Rheological preservative 5 parts

[0063] 6 parts of expansion agent,

[0064] 35 parts of quartz sand,

[0065] 2 parts of water reducing agent,

[0066] 0.5 part of retarder,

[0067] 0.3 parts of water retaining agent,

[0068] 0.4 parts of early strength agent,

[0069] Shrinkage reducer 0.3 parts,

[0070] Thixotropic lubricant 0.1 part

[0071] Redispersible latex powder 0.1 parts,

[0072] 0.1 part of defoamer,

[0073] Hydrophobic agent 0.2 parts

Embodiment 3

[0074] Example 3 A combination of high-performance micro-expansion grouting ratio is as follows

[0075] High Belite sulfoaluminate cement 45 parts

[0076] Heavy calcium 5 parts,

[0077] 4 parts mineral admixture,

[0078] Rheological preservative 3 parts

[0079] 4 parts of expansion agent,

[0080] 35 parts of quartz sand,

[0081] 1.5 parts of water reducer,

[0082] 1.5 parts of retarder,

[0083] 0.2 parts of water retaining agent,

[0084] 0.4 parts of early strength agent,

[0085] Shrinkage reducer 0.3 part,

[0086] Thixotropic lubricant 0.1 parts

[0087] Redispersible latex powder 0.3 part,

[0088] 0.2 part of defoamer,

[0089] Hydrophobic agent 0.2 parts

[0090] According to the test method described in the "Temporary Requirements for Grouting with Formwork in Tunnels", the technical performance of the binder in each example is measured by using a water-to-material ratio of 0.18 as shown in the table below:

[0091]

[0092] It can be seen from...

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Abstract

The invention relates to a high-performance micro-expansive grouting binder used for mold grouting after concrete pouring of a tunnel lining, belongs to the technical field of building materials, andis applicable to high-speed railway and highway tunnel construction. The invention aims to provide the micro-expansive grouting binder used in the mold grouting process of a tunnel. The grouting binder overcomes the defects that the strength of traditional cement paste is slowly increased, the binding strength between the traditional cement paste and concrete is low, and layering and weepage are likely to occur, the grouting binder has the advantages that the grouting binder has super-fluid and self-leveling performance, the ratio of water to material is fixed, the grouting binder is micro-expansive in the plasticizing stage, the grouting binder can repair circular construction joints generated in the lining in time and achieve filling of voids in an arch crown, and the grouting binder plays an important role in protection of the quality of the tunnel lining. The micro-expansive grouting binder is simple in composition and convenient to produce, the grouting binder can be used simply by directly adding water on site, the fluidity is 400 mm, the degree of separation is 0.28 d, the compressive strength is actually close to 80 MPa, the micro expansion is 0.5%, the anti-permeability ishigher than 1.5 MPa, the binding strength between the grouting binder and the concrete is 112%, the paste is completely bound with the concrete, and the structural integrity of the lining is high.

Description

technical field [0001] The invention relates to a high-performance micro-expansion grouting binder used for grouting with a mold after the tunnel lining concrete is poured, belongs to the technical field of building materials, and is suitable for tunnel construction of high-speed railways and highways. Background technique [0002] At present, the lining quality problems are quite prominent in the tunnel construction process, mainly because the second lining arch of some tunnels is hollow; the poor construction quality of the waterproof and drainage system leads to water leakage; the concrete strength does not meet the design requirements due to irregular pouring and vibration; the thickness of the inverted arch , The strength is not up to the standard, and it is poured and filled at one time. Due to construction quality defects in individual tunnels that have been opened and operated, the vaults have fallen off and water has leaked seriously, endangering the safety of train...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/70
CPCC04B28/06C04B2111/00293C04B2111/70C04B2201/50C04B14/28C04B18/08C04B18/12C04B18/146C04B14/06C04B2103/60C04B2103/302C04B2103/22C04B24/383C04B22/10C04B24/04C04B22/147C04B2103/58C04B2103/0085C04B2103/50C04B2103/65C04B2103/0057
Inventor 李建永刘金山刁书磊邢悦左雷康玉坤
Owner 石家庄市易达恒联路桥材料有限公司
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