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Anti-freezing concrete composition and preparation method thereof

A technology of concrete composition and antifreeze agent, applied in the field of concrete composition, can solve the problems of expansion, cracking, erosion and collapse of concrete structures, decrease of durability of concrete structures, influence on engineering safety and the like

Inactive Publication Date: 2020-07-07
东莞市易发混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under low temperature conditions, concrete freeze-thaw damage is the form of concrete damage under the joint action of water and freeze-thaw cycles, mainly manifested as internal micro-cracks and surface erosion. Expansion, cracking, denudation and collapse lead to a decrease in the durability of concrete structures and seriously affect engineering safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A frost-resistant concrete composition, comprising the following components by weight: 110 parts of Portland cement, 190 parts of gravel, 140 parts of sand, 30 parts of fly ash, 60 parts of water, 7 parts of polypropylene fiber, composite anti-freeze 14 parts of freezing agent, 0.3 parts of air-entraining agent, 12 parts of external additives, and 4 parts of composite water reducer.

[0031] Further, each part of the composite antifreeze agent includes the following components by weight: 5 parts of gelatin, 4 parts of sodium nitrite, 7 parts of ethylene glycol, 3 parts of urea, and 4 parts of triethanolamine.

[0032] Further, each part of external additives includes the following components by weight: 7 parts of nano silicon dioxide, 3 parts of barium sulfide powder.

[0033] Further, the Portland cement is Portland cement with a strength grade not lower than 42.5.

[0034] Further, the crushed stone is continuously graded crushed stone with a particle size of 5-15 mm...

Embodiment 2

[0046] In this embodiment, a frost-resistant concrete composition includes the following components in parts by weight: 100 parts of Portland cement, 160 parts of gravel, 130 parts of sand, 25 parts of fly ash, 55 parts of water, polypropylene fiber 5 parts, 11 parts of composite antifreeze, 0.2 parts of air-entraining agent, 10 parts of external additives, and 2 parts of composite water reducer.

[0047] Further, each part of the composite antifreeze agent includes the following components in parts by weight: 4 parts of gelatin, 3 parts of sodium nitrite, 6 parts of ethylene glycol, 2 parts of urea, and 3 parts of triethanolamine.

[0048] Further, each part of external additives includes the following components by weight: 5 parts of nano silicon dioxide, 2 parts of barium sulfide powder.

[0049] Further, the Portland cement is Portland cement with a strength grade of 42.5.

[0050] Further, the crushed stone is continuously graded crushed stone with a particle size of 5-1...

Embodiment 3

[0062] In this embodiment, a frost-resistant concrete composition includes the following components in parts by weight: 120 parts of Portland cement, 220 parts of gravel, 150 parts of sand, 35 parts of fly ash, 75 parts of water, polypropylene fiber 8 parts, 16 parts of composite antifreeze, 0.4 parts of air-entraining agent, 15 parts of external additives, and 5 parts of composite water reducer.

[0063] Further, each part of the composite antifreeze agent includes the following components by weight: 7 parts of gelatin, 6 parts of sodium nitrite, 10 parts of ethylene glycol, 4 parts of urea, and 5 parts of triethanolamine.

[0064] Further, each part of external additives includes the following components by weight: 9 parts of nano silicon dioxide, 4 parts of barium sulfide powder.

[0065] Further, the crushed stone is continuously graded crushed stone with a particle size of 5-15 mm, the sand is river sand, and the river sand is composed of coarse sand with a fineness modul...

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Abstract

The invention relates to the technical field of concrete compositions, in particular to an anti-freezing concrete composition and a preparation method thereof. The invention discloses an anti-freezingconcrete composition. The concrete comprises the following components in parts by weight: 100-120 parts of Portland cement, 160-220 parts of gravels, 130-150 parts of sand, 25-35 parts of fly ash, 55-75 parts of water, 5-8 parts of polypropylene fibers, 11-16 parts of a composite antifreeze agent, 0.2-0.4 part of an air entraining agent, 10-15 parts of an additive and 2-5 parts of a composite water reducing agent. The anti-freezing concrete composition has good freezing resistance, strength and impermeability, can meet engineering requirements on durability and use safety of concrete under alow-temperature condition, and is simple and efficient in preparation method, convenient to operate and control, stable in product quality and beneficial to industrial production.

Description

technical field [0001] The invention relates to the technical field of concrete compositions, in particular to a frost-resistant concrete composition and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the development of society, more and more concrete technology is applied in the high and cold environment, so the durability of concrete engineering under low temperature and severe cold conditions has become a major issue of increasing concern. In the cold regions of northern my country, the temperature in winter is very low, often reaching minus twenty degrees Celsius, or even minus forty or fifty degrees Celsius. Under low temperature conditions, concrete freeze-thaw damage is the form of concrete damage under the joint action of water and freeze-thaw cycles, mainly manifested as internal micro-cracks and surface erosion. Expansion, cracking, denudation and collapse lead to a decline in the durability of concre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/02C04B14/068C04B18/08C04B22/002C04B16/0633C04B2103/601C04B2103/304C04B2103/302C04B14/062C04B14/36
Inventor 蔡启涌吴曙弘
Owner 东莞市易发混凝土有限公司
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