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Concrete repairing material and preparation method thereof

A technology for repairing materials and concrete, which is used in the preparation of repairing materials and the field of repairing materials, can solve the problems of inappropriate wet base surface repairing construction, harsh maintenance conditions, and short operating time, and achieves improved volume stability and easy construction and operation. Flexible and durable effect

Inactive Publication Date: 2011-06-08
JIANGSU ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ordinary Portland cement mortar or concrete is a commonly used concrete structure repair material, but its setting time is long, the curing conditions are harsh, the strength development is slow, and the bond strength is low, so it is not suitable for rapid repair of reinforced concrete poles
The organic polymer modified cement-based repair materials developed and applied in recent years have high bonding strength and good corrosion resistance, but the operation time is short, and they are not suitable for repairing construction on wet base surfaces

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A concrete patching material made from the following components:

[0020] Water-based epoxy resin (epoxy equivalent weight 290) 25 parts

[0021] Water-based epoxy curing agent (amine hydrogen equivalent 310) 12 parts

[0022] Organosiloxane coupling agent KH-550 3 parts

[0023] 30 parts of quartz sand

[0024] Portland cement 52.5 grade 18 parts

[0025] 12 parts of water

[0026] Weigh various raw materials according to the above mass ratio, first pour quartz sand and cement into the mixer, stir for 4 minutes, then add water, coupling agent, water-based epoxy resin and the water-based epoxy curing agent, and stir evenly.

[0027] The properties of the repairing material prepared in this example are as follows: operating time 130 min, 25 o C Curing time is 24 hours, 7 days compressive strength is 68.2 MPa, tensile strength is 42.4 MPa, bending strength is 50.3 MPa, bond strength is 4.6 MPa (cohesive failure of old concrete).

Embodiment 2

[0029] A concrete patching material made from the following components:

[0030] Water-based epoxy resin (epoxy equivalent 200) 20 parts

[0031] Water-based epoxy curing agent (amine hydrogen equivalent 390) 8 parts

[0032] Organic siloxane coupling agent KH-550 2 parts

[0033] Quartz sand 35 parts

[0034] Ordinary Portland cement 42.5 grade 25 parts

[0035] 10 parts of water

[0036] The same method as in Example 1 was used to prepare a high-corrosion-resistant quick-repair material.

[0037] The properties of the repairing material prepared in this example are: operating time 115 min, 25 o C The curing time is 22 hours, the compressive strength is 70.5 MPa, the tensile strength is 40.8 MPa, the bending strength is 48.6 MPa, and the bond strength is 4.5 (cohesive failure of old concrete).

Embodiment 3

[0039] Water-based epoxy resin (epoxy equivalent 400) 15 parts

[0040] Water-based epoxy curing agent (amine hydrogen equivalent 280) 10 parts

[0041] Organic siloxane coupling agent KH-550 2 parts

[0042] Quartz sand 50 parts

[0043] Portland cement 42.5 grade 15 parts

[0044] 8 parts water

[0045] The same method as in Example 1 was used to prepare a high-corrosion-resistant quick-repair material.

[0046] The properties of the repairing material prepared in this example are: operating time 140 min, 25 o C The curing time is 18 hours, the compressive strength is 67.8 MPa, the tensile strength is 40.3 MPa, the bending strength is 45.7 MPa, and the bonding strength is 4.6 (cohesive failure of old concrete).

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Abstract

The invention provides a concrete repairing material and a preparation method thereof. The concrete repairing material is prepared from the following components in parts by weight: 10-30 parts of waterborne epoxy resin, 5-15 parts of waterborne epoxy firming agent, 1-4 parts of coupler, 25-55 parts of quartz sand, 10-25 parts of cement and 8-15 parts of water which are totally 100 parts by weight. The material provided by the invention has the action of repairing, reinforcing, protecting, and the like as well as long maneuverability time, is suitable for repairing a wet substrate, rapidly develops the strength after solidification, has high bonding strength with original cement and is particularly suitable for repairing reinforced concrete poles in service.

Description

technical field [0001] The invention relates to a repairing material for reinforced concrete poles, in particular to a repairing material for reinforced concrete poles of in-service power transmission lines, which has the functions of repairing, strengthening and protecting, and belongs to electric power and Field of civil engineering; the invention also relates to a method for the preparation of such a repair material. Background technique [0002] During the service process, reinforced concrete poles of transmission lines are often subjected to various dynamic and static loads, shrinkage and expansion caused by changes in temperature and humidity, and physical and chemical erosion of ambient gases and liquids. Concrete produces cracks and corrosion damage, seriously reducing the bearing capacity and safety of reinforced concrete poles. For damaged reinforced concrete poles, reinforcement and maintenance are often required to ensure the continuous safe and effective operat...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/04C04B28/02
Inventor 葛兆祥方永浩张建国刘建军陈大兵
Owner JIANGSU ELECTRIC POWER RES INST
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