Repairing material for concrete and preparation method thereof

A technology for repairing materials and concrete, applied in the field of repairing materials, can solve the problems of not suitable for wet environment or underwater repair construction, not suitable for rapid repair, poor corrosion resistance, etc., and achieves short setting and curing time, simple and flexible construction operation, durable good effect

Inactive Publication Date: 2012-07-04
HOHAI UNIV
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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 it has a long setting time, slow strength development, low bond strength, and poor corrosion resistance to some acids and salts, so it is not suitable for rapid repair, Especially for the repair of projects with higher corrosion resistance requirements
The organic polymer modified cement-based repair material developed and applied in recent years has high bonding strength and good corrosion resistance, but it is not suitable for repairing in a humid environment or underwater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A concrete patching material made from the following components:

[0021] 100 parts of slag powder

[0022] Water glass (modulus 1.0) 8 parts (solid content)

[0023] 4 parts polyvinyl acetate latex powder

[0024] 1.2 parts of polypropylene fiber

[0025] Quartz sand 100 parts

[0026] Quartz powder 150 parts

[0027] Water (including the water in the water glass) 40 parts

[0028] Weigh various raw materials according to the above mass ratio, first pour quartz sand, quartz powder, slag powder, polyvinyl acetate latex powder and polypropylene fiber into the mixer in turn, stir for 4 minutes, then add water glass and water in proportion, and stir uniform.

[0029] The properties of the repair material prepared in this example are: fluidity 150mm, initial setting time 65min, final setting time 86min, 3d compressive strength after hardening 30.2MPa, flexural strength 4.5MPa, 28d compressive strength 78.1MPa, flexural strength The strength is 8.6MPa, the 28d bonding...

Embodiment 2

[0031] A concrete patching material made from the following components:

[0032] 100 parts of slag powder

[0033] Water glass (modulus 1.4) 10 parts (solid content)

[0034] 5.5 parts of polyvinyl acetate latex powder

[0035] 1 part polypropylene fiber

[0036] Quartz sand 250 parts

[0037] Quartz powder 100 parts

[0038] Water (including the water in the water glass) 50 parts

[0039] The same method as in Example 1 was used to prepare a high-corrosion-resistant quick-repair material.

[0040] The properties of the obtained repair material are: fluidity 170mm, initial setting time 50min, final setting time 74min, 3d compressive strength after hardening 34.0MPa, flexural strength 4.8MPa, 28d compressive strength 78.1MPa, flexural strength 8.8MPa, 28d The bonding strength is 2.8MPa, the sulfate corrosion resistance coefficient is 1.02, and the acid resistance is greater than 2.5 times that of Portland cement mortar under the same conditions.

Embodiment 3

[0042] A concrete patching material made from the following components:

[0043] 100 parts of slag powder

[0044] Water glass (modulus 1.8) 12 parts (solid content)

[0045] Polyvinyl acetate latex powder 7 parts

[0046] 0.8 parts of polypropylene fiber

[0047] Quartz sand 250 parts

[0048] Quartz powder 100 parts

[0049] Water (including the water in the water glass) 55 parts

[0050] The same method as in Example 1 was used to prepare a high-corrosion-resistant quick-repair material.

[0051] The properties of the obtained repair material are: fluidity 185mm, initial setting time 40min, final setting time 52min, 3d compressive strength after hardening 38.4MPa, flexural strength 5.1MPa, 28d compressive strength 88.5MPa, flexural strength 8.6MPa, 28d The bonding strength is 3.2MPa, the sulfate corrosion resistance coefficient is 0.98, and the acid resistance is greater than 2.5 times that of Portland cement mortar under the same conditions.

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Abstract

The invention provides a repairing material for concrete, which is characterized in that the material is prepared by the following components: 100 parts by weight of slag powder, 4-14 parts by weight of soluble glass, 3-8 parts by weight of polyvinyl acetate emulsion powder, 0-2 parts by weight of polypropylene fibre, 100-300 parts by weight of quartz sand, 50-150 parts by weight of quartz powderand 35-65 parts by weight of water. The product of the invention has the functions, such as repair, reinforcement, seepage resistance and protection and the like. The coagulating and solidifying timeis short which can be adjusted according to demands; and the strength after coagulation develops fast, which is suitable for fast repair.

Description

technical field [0001] The invention relates to a repairing material for concrete structures, in particular to a repairing material for repairing, reinforcing, anti-seepage and protecting concrete in hydraulic engineering, civil engineering, transportation, electric power, seaport and other projects. material; the invention also relates to a method for the preparation of this repair material. Background technique [0002] During the service process, the cement concrete structures of various hydraulic engineering, civil engineering, transportation, electric power, seaport and other projects are often subjected to various dynamic and static loads, shrinkage and expansion caused by changes in temperature and humidity, and The physical and chemical erosion of environmental gases and liquids will cause cracks and corrosion damage to concrete, which will seriously reduce the bearing capacity and anti-permeability of concrete structures. For damaged concrete structures, rapid rein...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26C04B14/06
CPCC04B2111/20C04B2103/12C04B2111/00293C04B2111/72C04B28/26Y02W30/91C04B14/06C04B16/0633C04B18/141C04B24/2623
Inventor 方永浩葛兆祥肖玉明李夕强陈逸群贾丽丽
Owner HOHAI UNIV
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