Green anti-carbonization cement concrete

A cement concrete and anti-carbonation technology, which is applied in the field of concrete, can solve the problems of easy carbonization of concrete, and achieve the effects of not being easy to adsorb each other, improving dispersion, and improving salt resistance

Active Publication Date: 2022-05-27
广东粤皖混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this invention does not solve the problem that concrete is easy to carbonize

Method used

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  • Green anti-carbonization cement concrete
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  • Green anti-carbonization cement concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A kind of green anti-carbonation cement concrete is prepared by the following method:

[0071] S1 adds 480kg P.O 42.5 ordinary Portland cement, 480kg medium sand, and 1050kg crushed stone to 190kg water in sequence, and mixes for 1h at a stirring speed of 25.5rpm to obtain concrete coarse material, which is for subsequent use;

[0072] S2 continues to add 1.2kg of basalt fiber with a length of 2mm, 15kg of high-dispersion fumed silica, and 6.5kg of polycarboxylate high-performance water-reducing agent in sequence to the concrete rough material obtained in step S1, and mix at a stirring speed of 35rpm for 2h, Get concrete mortar, spare;

[0073] In S3, the concrete mortar obtained in step S2 is poured, cured, and watered for curing, and the curing times are 3 times / day, and the curing period is 28 days to obtain the green anti-carbonation cement concrete.

[0074] The crushed stone is continuously graded crushed stone, which is obtained by blending 5-10 mm crushed stone...

Embodiment 2

[0081] A kind of green anti-carbonation cement concrete is prepared by the following method:

[0082] S1 adds 480kg P.O 42.5 ordinary Portland cement, 480kg medium sand, and 1050kg crushed stone to 190kg water in sequence, and mixes for 1h at a stirring speed of 25.5rpm to obtain concrete coarse material, which is for subsequent use;

[0083] S2 continues to add 1.2kg of basalt fiber with a length of 2mm, 15kg of high-dispersion fumed silica, and 6.5kg of polycarboxylate high-performance water-reducing agent in sequence to the concrete rough material obtained in step S1, and mix at a stirring speed of 35rpm for 2h, Get concrete mortar, spare;

[0084] In S3, the concrete mortar obtained in step S2 is poured, cured, and watered for curing, and the curing times are 3 times / day, and the curing period is 28 days to obtain the green anti-carbonation cement concrete.

[0085] The crushed stone is continuously graded crushed stone, which is obtained by blending 5-10 mm crushed stone...

Embodiment 3

[0092] A kind of green anti-carbonation cement concrete is prepared by the following method:

[0093] S1 adds 480kg P.O 42.5 ordinary Portland cement, 480kg medium sand, and 1050kg crushed stone to 190kg water in sequence, and mixes for 1h at a stirring speed of 25.5rpm to obtain concrete coarse material, which is for subsequent use;

[0094] S2 continues to add 1.2kg of basalt fiber with a length of 2mm, 15kg of high-dispersion fumed silica, and 6.5kg of polycarboxylate high-performance water-reducing agent in sequence to the concrete rough material obtained in step S1, and mix at a stirring speed of 35rpm for 2h, Get concrete mortar, spare;

[0095] In S3, the concrete mortar obtained in step S2 is poured, cured, and watered for curing, and the curing times are 3 times / day, and the curing period is 28 days to obtain the green anti-carbonation cement concrete.

[0096] The crushed stone is continuously graded crushed stone, which is obtained by blending 5-10 mm crushed stone...

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Abstract

According to the green anti-carbonization cement concrete disclosed by the invention, by adding iron ion doped modified TiO2, the photocatalytic performance of TiO2 is changed, CO2 in air can be effectively degraded, the anti-carbonization performance of the concrete is improved, and by modifying fumed silica, the anti-carbonization performance of the concrete is improved. A benzene ring structure and molecular chains with different length gradients are introduced into the surface of the fumed silica, the purpose of improving the dispersity is achieved, the introduction of the modified fumed silica is beneficial to the combination of a matrix and basalt fibers, and the mechanical property of the concrete is macroscopically improved.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a green anti-carbonation cement concrete. Background technique [0002] Carbonation of concrete refers to the phenomenon that carbon dioxide, sulfur dioxide and other media in the surrounding environment penetrate into the concrete surface and chemically react with the alkaline substances in the cement stone, thereby reducing the pH value. Carbonization of concrete reduces the alkalinity in the concrete, destroys the passive film on the surface of the steel bar, and makes the concrete lose its protective effect on the steel bar. Seriously affects the life of concrete, especially in today's increasingly serious greenhouse effect, it is very necessary to improve the carbonation performance of concrete. [0003] CN113045272A discloses a green environmental protection concrete and a preparation method thereof. The green environmental protection concrete comprises the following comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/02C04B111/22C04B111/20C04B14/06C04B14/30
CPCC04B28/04C04B20/023C04B2111/22C04B2111/2061C04B2111/29C04B2111/2015C04B2201/52C04B14/02C04B14/06C04B14/4656C04B14/066C04B2103/302C04B14/305Y02W30/91
Inventor 李静
Owner 广东粤皖混凝土有限公司
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