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Concrete repairing material suitable for ocean environment and preparation method thereof

A technology for repairing materials and marine environments, which is applied in the field of cement concrete, and can solve problems such as loss of manpower and material resources, aggravation of corrosion of steel bars, etc., and achieve the effect of improving impermeability and high early strength

Inactive Publication Date: 2018-01-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is no repair material used in marine erosion environment. Repairs with ordinary mortar after seawater erosion often peel off shortly after repair, and the corrosion of steel bars increases, causing a lot of manpower and material losses.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The concrete repair material suitable for the marine environment of this embodiment is composed of: 230 parts of Portland cement, 47 parts of aluminate cement, 25 parts of dihydrate gypsum, 4.5 parts of naphthalene-based superplasticizer, and 1.5 parts of lithium carbonate , 0.015 parts of rosin air-entraining agent, 20 parts of polyester fiber, 0.15 parts of silicone powder defoamer, 450 parts of quartz sand.

[0043] When repairing, add 150 parts of water to the concrete repairing material and stir evenly, then apply it on the damaged concrete structure for repairing.

[0044] The compressive strength of the repaired concrete structure soaked in tap water for 1d, 3d and 28d are 38MPa, 41MPa and 52MPa respectively. After 28 days of immersion in seawater for one month, three months and six months, the compressive strengths are 68MPa, 68MPa and 52MPa respectively, and the porosity is 2.78%, 0.85% and 0.60%, respectively. After soaking in seawater for 182 days, the mass ...

Embodiment 2

[0046] The concrete repair material suitable for the marine environment of this embodiment is composed of: 217.5 parts of Portland cement, 46.4 parts of aluminate cement, 22.6 parts of dihydrate gypsum, 15.3 parts of mineral powder, and 4.5 parts of naphthalene-based superplasticizer , 1.5 parts of lithium carbonate, 0.015 parts of rosin air-entraining agent, 18 parts of polyester fiber, 0.12 part of organic silicon powder defoamer, 450 parts of quartz sand.

[0047] When repairing, add 130 parts of water to the re-concrete repair material and stir evenly, then apply it on the damaged concrete structure for repair.

[0048] The compressive strength of the repaired concrete structure soaked in tap water for 1d, 3d and 28d are 50MPa, 55MPa and 62MPa respectively. After 28 days of soaking in seawater for one month, three months and six months, the compressive strengths are 70MPa, 74MPa and 72MPa respectively. The porosities are: 3.46%, 2.44% and 0.89%, respectively. After soaki...

Embodiment 3

[0050] The concrete repair material suitable for the marine environment of this embodiment is composed of: 194.3 parts of Portland cement, 41.5 parts of aluminate cement, 20.8 parts of dihydrate gypsum, 45.5 parts of mineral powder, and 4.5 parts of naphthalene-based superplasticizer , 1.5 parts of lithium carbonate, 0.015 parts of rosin air-entraining agent, 18 parts of polyester fiber, 0.15 part of organic silicon powder defoamer, 500 parts of quartz sand.

[0051] When repairing, add 125 parts of water to the concrete repairing material and stir evenly, then apply it on the damaged concrete structure for repairing.

[0052] The compressive strength of the repaired concrete structure soaked in tap water for 1d, 3d and 28d are 50MPa, 56MPa and 60MPa respectively. After 28 days of soaking in seawater for one month, three months and six months, the compressive strengths are: 78MPa, 79MPa and 73MPa respectively. The porosities are: 2.46%, 1.79% and 0.97%, respectively. Soaked ...

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Abstract

The invention relates to a concrete repairing material suitable for an ocean environment and a preparation method thereof. The repairing material is prepared from the following components in parts bymass: 100 to 230 parts of portland cement, 20 to 47 parts of aluminate cement, 10 to 25 parts of dihydrate gypsum, 0 to 110 parts of mineral powder, 3.0 to 4.5 parts of water reducer, 0 to 2 parts ofearly strength agent, 0.01 to 0.02 part of air entraining agent, 5 to 20 parts of polyester fiber, 0.10 to 0.15 part of antifoaming agent and 300 to 500 parts of quartz. ,According to the invention, the portland cement is complexed with the aluminate cement, so that the early strength and later strength are ensured, resistance of mortar to chlorine salt, sulfate and magnesium salt in the ocean environment is enhanced. The concrete repairing material is suitable for ocean-eroded concrete repairing engineering, is large in market space, and is high in practicability.

Description

technical field [0001] The invention belongs to the technical field of cement concrete application, and relates to a concrete repair material suitable for marine environment and a preparation method thereof. Background technique [0002] With the development of the economy, marine resources are increasingly being developed and utilized by people, and there are more and more concrete buildings under the marine environment, and the phenomenon of concrete corrosion is becoming more and more common. Especially for coastal and cross-sea reinforced concrete or prestressed reinforced concrete structures, such as seaports, tidal gates, bridges, tunnels, oil production platforms, etc. Due to harmful ions (Cl - , SO 4 2- , Mg 2+ etc.) will cause cracking of the concrete protective layer, and even damage the concrete components in severe cases, thereby shortening the service life of the concrete project, which not only affects the function of the concrete structure, but also causes...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B111/72C04B111/24C04B111/26
Inventor 李国新张爱宋战平
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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