Elastic epoxy plaster for tunnel segment caulking and preparation method of elastic epoxy plaster

A tunnel segment and epoxy cement technology, applied in epoxy resin glue, adhesives, solid waste management and other directions, can solve the problems affecting the long-term usability of materials, the high molecular weight and brittleness of liquid polysulfide polymers, etc., to achieve excellent Bonding reliability, excellent bonding effect, elongation improvement effect

Active Publication Date: 2021-08-17
CARBON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, polysulfide rubber sealants are mostly two-component sealants. The main agent is liquid polysulfide polymer, and the curing agent is metal oxide. Although the performance of the high-elastic rubber sealing body is good, due to the large molecular weight of the liquid polysulfide polymer, the material is very viscous, and it is difficult to stir during the embedding operation, and the construction is inconvenient; although the polyurethane sealant is simple to operate and convenient to construct , but due to the underground construction, the construction environment often has high humidity, even open water and is difficult to remove. The polyurethane sealant is very sensitive to m

Method used

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  • Elastic epoxy plaster for tunnel segment caulking and preparation method of elastic epoxy plaster
  • Elastic epoxy plaster for tunnel segment caulking and preparation method of elastic epoxy plaster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An elastic epoxy mastic for tunnel segment caulking, which is composed of two components A and B;

[0024] Component A includes the following raw materials in parts by weight: 75 parts of bisphenol A epoxy resin, 10 parts of bisphenol F epoxy resin, 20 parts of diluent, 4 parts of silane coupling agent, 5 parts of thixotropic agent and 10 parts of filler;

[0025] The B component includes the following raw materials in parts by weight: 100 parts of curing agent, 5 parts of thixotropic agent, and 10 parts of filler;

[0026] The curing agent is A19 curing agent, and the A19 curing agent is a modified curing agent with low modulus and high flexibility composed of the first polymer and the second polymer; the first polymer is formaldehyde, 1,3-phenylene dimethacrylate A polymer of amine and phenol; the second polymer is a polymer of unsaturated aliphatic acid dimer, tall oil fatty acid and polyalkyl tetramine; the active hydrogen equivalent of A19 curing agent is 120;

...

Embodiment 2

[0033] An elastic epoxy mastic for tunnel segment caulking, which is composed of two components A and B;

[0034] Component A includes the following raw materials in parts by weight: 75 parts of bisphenol A epoxy resin, 10 parts of bisphenol F epoxy resin, 20 parts of diluent, 4 parts of silane coupling agent, 5 parts of thixotropic agent and 10 parts of filler;

[0035] Component B includes the following raw materials in parts by weight: 100 parts of curing agent, 5 parts of thixotropic agent, and 10 parts of filler;

[0036] The curing agent is A19 curing agent, and the A19 curing agent is a modified curing agent with low modulus and high flexibility composed of the first polymer and the second polymer; the first polymer is formaldehyde, 1,3-phenylene dimethacrylate A polymer of amine and phenol; the second polymer is a polymer of unsaturated aliphatic acid dimer, tall oil fatty acid and polyalkyl tetramine; the active hydrogen equivalent of A19 curing agent is 120;

[003...

Embodiment 3

[0043] An elastic epoxy mastic for tunnel segment caulking, which is composed of two components A and B;

[0044] Component A includes the following raw materials in parts by weight: 75 parts of bisphenol A epoxy resin, 10 parts of bisphenol F epoxy resin, 20 parts of diluent, 4 parts of silane coupling agent, 5 parts of thixotropic agent and 10 parts of filler;

[0045] The B component includes the following raw materials in parts by weight: 100 parts of curing agent, 5 parts of thixotropic agent, and 10 parts of filler;

[0046] The curing agent is A19 curing agent, and the A19 curing agent is a modified curing agent with low modulus and high flexibility composed of the first polymer and the second polymer; the first polymer is formaldehyde, 1,3-phenylene A polymer of amine and phenol; the second polymer is a polymer of unsaturated aliphatic acid dimer, tall oil fatty acid and polyalkyl tetramine; the active hydrogen equivalent of A19 curing agent is 120;

[0047] The fill...

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PUM

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Abstract

The invention discloses elastic epoxy plaster for tunnel segment caulking and a preparation method of the elastic epoxy plaster. The elastic epoxy plaster comprises a component A and a component B in a mass part ratio of 1: (1-1.5), the component A is composed of epoxy resin, a diluent, a thixotropic agent and the like, and the component B is composed of a curing agent, a thixotropic agent and the like. The elastic epoxy plaster provided by the invention is good in toughness, and the elongation can reach 200% or above; the bonding effect on duct piece concrete is good, the impermeability is good, the dry-state positive tensile bonding strength is larger than 2.5 MPa in a test, the wet-state positive tensile bonding strength is larger than 2.0 MPa in a test, and the impermeability grade is larger than P12 in a test when the elastic epoxy plaster is used in cooperation with concrete; the elastic epoxy plaster not only has excellent fatigue stress resistance, but also has excellent damp-heat aging resistance, and can be used for a long time in a dynamic load environment of subway operation and an underground humid environment. The elastic epoxy plaster provided by the invention is suitable for caulking sealing of tunnel segments.

Description

technical field [0001] The invention relates to the field of tunnel segment construction, and more specifically relates to an elastic epoxy mastic for tunnel segment caulking and a preparation method thereof. Background technique [0002] During shield tunneling construction, water seepage in the tunnel will cause underground engineering leakage, which will bring many hazards, such as damage to the main body of the structure, corrosion of equipment, impact on appearance, and endanger operation safety. When the shield method is adopted, the waterproof design is extremely important. The waterproof design of the shield tunnel follows the principle of "prevention first, multi-channel fortification, and comprehensive treatment". On the basis of the self-waterproofing of the segments, the waterproofing of the segment joints is particularly important. Segment seam waterproofing mainly includes elastic gasket waterproofing between segments and caulking waterproofing between adjacent...

Claims

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Application Information

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IPC IPC(8): C09J163/02C08G59/46C08G59/62C09J11/04
CPCC09J163/00C09J11/04C08G59/623C08G59/46C08L2205/025C08L2201/08C08L63/00C08K7/18Y02W30/91
Inventor 周洪芝
Owner CARBON TECH CO LTD
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