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Self-compacting concrete for concrete repairing and preparation method of self-compacting concrete for concrete repairing

A self-compacting concrete and concrete technology, which is applied in the field of cement to achieve the effects of wide repair applicability, reduction of construction risks and good economic advantages

Inactive Publication Date: 2018-01-12
ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the application of self-compacting concrete in the repair of damaged concrete

Method used

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  • Self-compacting concrete for concrete repairing and preparation method of self-compacting concrete for concrete repairing
  • Self-compacting concrete for concrete repairing and preparation method of self-compacting concrete for concrete repairing
  • Self-compacting concrete for concrete repairing and preparation method of self-compacting concrete for concrete repairing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare ingredients:

[0032] Cement: P.O 42.5 grade ordinary portland cement; rapid hardening sulfoaluminate cement: 42.5 grade; slag powder: S95 grade slag powder; expansion agent: calcium sulfoaluminate expansion agent; dry powder additive: composed of vinyl acetate and ethylene Copolymerized rubber powder, lithium carbonate, polypropylene fiber, and xanthan gum are uniformly mixed and stirred according to the mass ratio of 100:10:10:1; fine aggregate: river sand with a fineness modulus of 2.7; coarse aggregate: 5~ 20mm continuous graded crushed stone; water: tap water.

[0033] In order to prevent sticking to the pot, first weigh an appropriate amount of materials in proportion, mix the concrete, pour out the mixed concrete after the inner wall of the mixer is stained with cement mortar, and then add ordinary portland cement, rapid hardening sulphoaluminate cement, slag powder, expansion Put agent, dry powder additive, fine aggregate, and coarse aggregate into the ...

Embodiment 2

[0040] Prepare ingredients:

[0041] Cement: P.O 42.5 grade ordinary portland cement; rapid hardening sulfoaluminate cement: 42.5 grade; slag powder: S105 grade granulated blast furnace slag powder; expansion agent: calcium oxide expansion agent; dry powder additive: vinyl acetate homopolymer Rubber powder, aluminum sulfate, polyvinyl alcohol fiber, and hydroxypropyl guar gum are mixed and stirred evenly according to the mass ratio of 100:10:10:1; fine aggregate: machine-made sand with a fineness modulus of 2.4; coarse aggregate : 5 ~ 16mm continuously graded crushed stone; water: tap water.

[0042] In order to prevent sticking to the pot, first weigh an appropriate amount of materials in proportion, mix the concrete, and pour out the mixed concrete after the inner wall of the mixer is stained with cement mortar. Put ordinary Portland cement, rapid-hardening sulfoaluminate cement, slag powder, expansion agent, dry powder additive, fine aggregate, and coarse aggregate into th...

Embodiment 3

[0049] Prepare ingredients:

[0050] Cement: P.O 42.5 grade ordinary Portland cement; rapid hardening sulfoaluminate cement: 42.5 grade; slag powder: S95 grade granulated blast furnace slag powder; expansion agent: calcium sulfoaluminate-calcium oxide expansion agent; dry powder additives: Styrene and butadiene copolymer powder, lithium carbonate, polyacrylonitrile fiber, and hydroxyethyl cellulose are uniformly mixed and stirred at a mass ratio of 100:10:10:1; fine aggregate: fineness modulus of 2.6 River sand; coarse aggregate: 10-16mm continuously graded crushed stone; water: tap water.

[0051] In order to prevent sticking to the pot, first weigh an appropriate amount of materials in proportion, mix the concrete, and pour out the mixed concrete after the inner wall of the mixer is stained with cement mortar. Put ordinary Portland cement, fast-hardening sulfoaluminate cement, slag powder, expansion agent, dry powder additive, fine aggregate, and coarse aggregate into the p...

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Abstract

The invention discloses self-compacting concrete for concrete repairing and a preparation method of the self-compacting concrete for concrete repairing. Per cubic meter of the concrete is prepared from 280-340kg of ordinary Portland cement, 30-40kg of quick-hardening sulfate aluminum cement, 120-150kg of slag powder, 30-40kg of an expanding agent, 25-35kg of a dry powder additive, 800-900kg of fine aggregate, 750-850kg of continuously graded aggregate, 6.0-8.5kg of a special polycarboxylate superplasticizer and 165-175kg of water. The self-compacting concrete for concrete repairing is preparedby well mixing of ordinary Portland cement, quick-hardening sulfate aluminum cement, slag powder, the expanding agent, the dry powder additive, fine aggregate and coarse aggregate according to a certain stirring process. The self-compacting concrete for concrete repairing is high in strength of bonding to old concrete, high in early strength, capable of slightly expanding and especially applicable to repairing of dense reinforcement cement concrete structures and CRTS III type slab ballastless track filling layers by self-compacting concrete filling layers.

Description

technical field [0001] The invention belongs to the technical field of cement, and in particular relates to a self-compacting concrete for concrete repair and a preparation method thereof, which is suitable for repairing cement concrete structures with dense reinforcement and repairing when the filling layer of CRTSⅢ slab ballastless track is not fully poured. Background technique [0002] With the rapid development of my country's economy in recent years, the number of concrete buildings in our country has continued to increase, which has brought great convenience to people's lives. However, as the buildings have been affected by various environmental factors for a long time, many buildings have different degrees of surface Damage, exposed steel and other damage. In addition, the CRTSⅢ slab ballastless track with completely independent intellectual property rights has overcome the obvious defects in the construction, operation and maintenance of the CRTS I and CRTS II slab b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/72
Inventor 彭建伟黄海王仲汉刘洋梅晓君姚佳楠
Owner ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD
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