Preparation method of concrete with functions of reinforcing, internal curing and shrinkage compensating

A technology for compensating shrinkage and concrete, which is applied in the field of new building materials, can solve problems such as the reduction of concrete strength, and achieve the effect of inhibiting concrete shrinkage and realizing self-shrinkage

Inactive Publication Date: 2019-07-09
GUILIN UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a concrete preparation method with the functions of reinforcement, internal maintenance and shrinkage compensation for the current problem of reduction in concrete strength caused by internal maintenance and compensation of shrinkage in concrete

Method used

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  • Preparation method of concrete with functions of reinforcing, internal curing and shrinkage compensating
  • Preparation method of concrete with functions of reinforcing, internal curing and shrinkage compensating
  • Preparation method of concrete with functions of reinforcing, internal curing and shrinkage compensating

Examples

Experimental program
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Effect test

Embodiment 1

[0022]1) A concrete with the functions of reinforcement, internal maintenance and shrinkage compensation, consisting of 42.5 ordinary Portland cement, silica fume, mineral powder, machine-made sand, stones, water reducing agent, internal curing agent, organic early-strength components, Composed of water and other raw materials, the components weighed per cubic meter are: 380kg of cement, 30kg of silica fume, 70kg of mineral powder, 800kg of machine-made sand, 970kg of stones, 11.9kg of internal culture-water reducing agent, and 155kg of water.

[0023] 2) The internal curing agent is prepared from the original liquid of the internal curing agent and water at a ratio of 1:14. When preparing the internal curing agent, the original liquid and water are stirred together for 5-10 minutes, and the internal curing agent is formed after saturated water absorption for 0.5 hours.

[0024] 3) Compound the internal curing agent and the organic early-strength component at a ratio of 20:1, a...

Embodiment 2

[0032] 1) A concrete with the functions of reinforcement, internal maintenance and shrinkage compensation, consisting of 42.5 ordinary Portland cement, silica fume, mineral powder, machine-made sand, stones, water reducing agent, internal curing agent, organic early-strength components, Composed of water and other raw materials, the components weighed per cubic meter are: 440kg of cement, 30kg of silica fume, 70kg of mineral powder, 760kg of machine-made sand, 930kg of stones, 22.4kg of internal culture-water reducing agent, and 155kg of water.

[0033] 2) The internal curing agent is prepared from the original liquid of the internal curing agent and water at a ratio of 1:14. When preparing the internal curing agent, the original liquid and water are stirred together for 5-10 minutes, and the internal curing agent is formed after saturated water absorption for 0.5 hours.

[0034] 3) Compound internal curing agent and organic early-strength component at a ratio of 20:1, and stir...

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Abstract

The invention discloses a preparation method of concrete with the functions of reinforcing, internal curing and shrinkage compensating. The concrete comprises the following raw materials: in percent by mass, 8-17.5% of ordinary Portland cement, 28-41% of machine-made sand, 39-45% of cobblestone, 0.75-1.5% of silica fume, 2-4% of mineral powder, 0.3-0.65% of a water reducing agent, 0.5-1.5% of an internal curing agent, 0.03-0.05% of an organic early strength component and 5-7% of water. The concrete is obtained through mixing, pouring and curing of the raw materials. A special internal curing agent is obtained through mixing of the internal curing agent and the organic early strength component, and the special internal curing agent has the characteristics of high water absorption, high water retention and controlled release water, and provides a continuous and effective early internal curing effect for the concrete, so that the risk of early shrinkage cracking of the concrete is reduced.

Description

technical field [0001] The invention relates to a concrete preparation method with the functions of reinforcement, internal maintenance and shrinkage compensation, and belongs to the technical field of new building materials. Background technique [0002] Modern concrete has the advantages of high compressive strength, good durability and low price, which makes it more and more widely used in engineering. There are micro-cracks in the concrete itself after it is formed. During the use of concrete, due to the external environment, climate and load, the micro-cracks gradually expand and connect, and eventually develop into early cracks in concrete. Cracks provide a channel for the intrusion of harmful media, which reduces the long-term durability of concrete, and the appearance of cracks endangers the service life of concrete, leading to serious problems in the safety of concrete structures. Due to the self-drying effect and environmental degradation of concrete, water loss i...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B24/42
CPCC04B28/04C04B14/02C04B14/06C04B18/146C04B18/141C04B2103/302C04B24/425C04B2103/12
Inventor 刘荣进刘中原池志安陈平卢佳林吴家有赵艳荣韦家崭周睿张忠飞张博恒胡雷张建兵
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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