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Special composite additive for high-workability and high-fluidity manufactured sand concrete

A composite additive, high fluidity technology, applied in the field of concrete processing, can solve the problems of concrete strength, durability reduction, workability and fluidity, cohesion of fresh concrete, poor water retention, etc., to expand the scope of use Effect

Inactive Publication Date: 2017-05-31
安徽乾元管业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to poor gradation of machine-made sand, it is often easy to lead to poor cohesion and water retention of fresh concrete, easy segregation, bleeding, and reduced workability and fluidity, resulting in reduced concrete strength and durability, and increased early shrinkage. After the concrete is hardened, the water ripples on the surface are serious, which affects the sensory quality of the concrete structure

Method used

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  • Special composite additive for high-workability and high-fluidity manufactured sand concrete
  • Special composite additive for high-workability and high-fluidity manufactured sand concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add 3 parts of methyl etherified amino resin and 2 parts of C9 petroleum resin to 15 parts of ethylene glycol diglycidyl ether, heat up to 120-130 ° C at a heating rate of 10 ° C / min and mix for 30 minutes, then add 2 parts 1 part of hexamethylolmelamine hexamethyl ether and 1 part of nano rubber powder, and continue to heat and mix at 120-130 ° C for 15 minutes to obtain material I;

[0022] (2) Add 3 parts of carbomer resin, 2 parts of polyvinyl butyral and 0.5 part of vulcanized lard to 5 parts of bisphenol A formaldehyde epoxy resin, and raise the temperature to 115-120 at a heating rate of 5°C / min. Insulate and mix for 15 minutes at ℃, then add 1 part of hydrogenated castor oil and 0.5 part of titanate coupling agent while hot, and mix well to obtain material II;

[0023] (3) Add 2 parts of hydrophilic fumed silica and 2 parts of microcrystalline cellulose to material II, heat up to 115-120 ° C at a heating rate of 15 ° C / min and mix for 15 min, then add ma...

Embodiment 2

[0027] (1) Add 5 parts of methyl etherified amino resin and 2 parts of C9 petroleum resin to 15 parts of ethylene glycol diglycidyl ether, heat up to 120-130 ° C at a heating rate of 10 ° C / min and mix for 30 minutes, then add 1 1 part of hexamethylolmelamine hexamethyl ether and 2 parts of nano rubber powder, continue to mix at 120-130 ° C for 15 minutes to obtain material I;

[0028] (2) Add 3 parts of carbomer resin, 3 parts of polyvinyl butyral and 0.5 part of vulcanized lard to 5 parts of bisphenol A formaldehyde epoxy resin, and raise the temperature to 115-120 at a heating rate of 5°C / min. Insulate and mix at ℃ for 15 minutes, then add 0.5 part of hydrogenated castor oil and 0.5 part of titanate coupling agent while hot, and mix well to obtain material II;

[0029] (3) Add 2 parts of hydrophilic fumed silica and 1 part of microcrystalline cellulose to material II, heat up to 115-120 ° C at a heating rate of 15 ° C / min and mix for 15 min, then add material I and 0.2 ...

Embodiment 3

[0033] The composite additive prepared in Example 1 and Example 2 was added to the machine-made sand concrete base material, and the concrete was obtained through thorough mixing and mixing. The specific raw material ratio is shown in Table 1.

[0034] Table 1 Concrete raw material ratio

[0035]

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Abstract

The invention discloses a special composite additive for high-workability and high-fluidity manufactured sand concrete and relates to the technical field of concrete processing. The special composite additive is prepared from the following raw materials in parts by weight: 10-15 parts of ethylene glycol diglycidyl ether, 5-10 parts of bisphenol A formaldehyde epoxy resin, 3-6 parts of methylated amino resin, 3-6 parts of carbomer resin, 2-4 parts of C9 petroleum resin, 2-4 parts of polyvinyl butyral, 2-4 parts of hydrophilic fumed silica, 1-2 parts of hexakis(methoxymethyl)melamine, 1-2 parts of nano rubber powder, 1-2 parts of microcrystalline cellulose, 0.5-1 part of hydrogenated castor oil, 0.3-0.5 part of vulcanized lard oil, 0.3-0.5 part of a titanate coupling agent and 0.1-0.3 part of a rare earth compound additive. The composite additive disclosed by the invention is added into a manufactured sand concrete base material and sufficiently stirred to obtain concrete with good workability and fluidity; and by adopting the concrete, the 2h slump loss is low, the compressive strength and impermeability grade are high, and thus the application range of the prepared concrete is expanded.

Description

[0001] Technical field: [0002] The invention relates to the technical field of concrete processing, in particular to a special composite additive for machine-made sand concrete with high workability and high fluidity. [0003] Background technique: [0004] In recent years, due to the shortage of natural medium-coarse sand resources, the price has skyrocketed due to the impact of the environment. In addition, natural medium-coarse sand generally has to be transferred, which undoubtedly increases the cost of concrete. However, my country is rich in quarry resources. In order to reduce the purchase cost of natural medium-coarse sand, machine-made sand is gradually used to mix concrete and meet the requirements of high-strength and high-performance concrete. [0005] Due to poor gradation of machine-made sand, it is often easy to lead to poor cohesion and water retention of fresh concrete, easy segregation, bleeding, and reduced workability and fluidity, resulting in reduced con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B28/00
CPCC04B40/0039C04B28/00C04B2201/50C04B24/023C04B24/281C04B24/124C04B24/2647C04B24/26C04B24/30C04B22/06C04B24/129C04B24/383C04B24/08C04B24/16C04B24/045C04B24/2623C04B24/2652C04B24/305C04B24/36C04B24/02C04B14/305C04B24/12C04B14/10C04B2103/0068C04B14/30C04B22/002C04B14/06C04B14/02C04B18/08
Inventor 李伯广朱红吉王金福陆国平丁敬海荚红松
Owner 安徽乾元管业有限公司