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Long-life rust-proof recycled concrete

A technology of recycled concrete and longevity, applied in the field of concrete, can solve the problems such as the corrosion of steel bars of recycled concrete, and achieve the effect of improving the effect of grinding aid and improving the fluidity.

Inactive Publication Date: 2021-11-05
南通吉泰新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the problem that recycled concrete is easy to corrode steel bars, this application provides a high-life rust-proof recycled concrete

Method used

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  • Long-life rust-proof recycled concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A method for preparing high-life antirust recycled concrete, comprising the following steps:

[0060] S1. Add 52g of N-acetylaminoglycine and 36g of sodium acetate into 47g of benzaldehyde solution and 45g of acetic anhydride solution and mix to form a mixed solution.

[0061] S2. Distill the mixed solution of S1 at 120° C. and 110 KPa for 4 hours, collect the reflux liquid, cool the reflux liquid to room temperature, and filter to obtain the crude product solid of 2-acetamidophenylacrylic acid, and wash the crude product solid with cold water.

[0062] S3. Dissolve the washed crude 2-acetamidophenylacrylic acid in 350g of acetone, add 120g of water to prepare a mixed solution, distill the mixed solution at 100°C and 110KPa for 4 hours, and collect the reflux. After the reflux liquid was cooled, it was filtered to obtain acetone-containing solid, and the acetone-containing solid was dried in an oven at 120°C for 8 hours to obtain 2-acetamidophenylacrylic acid solid.

...

Embodiment 2

[0070] A method for preparing high-life antirust recycled concrete, comprising the following steps:

[0071] S1. Add 43g of N-acetylaminoglycine and 30g of sodium acetate into 39g of benzaldehyde solution and 37g of acetic anhydride solution and mix to form a mixed solution.

[0072] S2. Distill the mixed solution of S1 at 110° C. and 100 KPa for 3.5 h, collect the reflux liquid, cool the reflux liquid to room temperature, and filter to obtain the crude product solid of 2-acetamidophenylacrylic acid, and wash the crude product solid with cold water.

[0073] S3. Dissolve the washed crude 2-acetamidophenylacrylic acid in 325g of acetone, add 110g of water to prepare a mixed solution, distill the mixed solution at 90°C and 100KPa for 3.5h, and collect the reflux. After the reflux liquid was cooled, it was filtered to obtain acetone-containing solid, and the acetone-containing solid was dried in an oven at 115°C for 7 hours to obtain 2-acetamidophenylacrylic acid solid.

[0074]...

Embodiment 3

[0081] A method for preparing high-life antirust recycled concrete, comprising the following steps:

[0082] S1. Add 35g of N-acetylaminoglycine and 24g of sodium acetate into 31g of benzaldehyde solution and 30g of acetic anhydride solution and mix to form a mixed solution.

[0083] S2. Distill the mixed solution in S1 at 100°C and 90KPa for 3 hours, collect the reflux liquid, cool the reflux liquid to room temperature, and filter to obtain the crude product solid of 2-acetamidophenylacrylic acid, and wash the crude product solid with cold water.

[0084] S3. Dissolve the washed crude 2-acetamidophenylacrylic acid in 300g of acetone, add 100g of water to prepare a mixed solution, distill the mixed solution at 80°C and 90KPa for 3 hours, and collect the reflux. After the reflux liquid was cooled, it was filtered to obtain acetone-containing solid, and the acetone-containing solid was dried in an oven at 110°C for 6 hours to obtain 2-acetamidophenylacrylic acid solid.

[0085]...

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Abstract

The invention relates to the field of concrete, and particularly discloses long-service-life rust-proof recycled concrete and a preparation method thereof. The long-life antirust recycled concrete is prepared from the following raw materials in parts by weight: 260 to 280 parts of Portland cement; 60 to 100 parts of a mineral admixture; 1720 to 2150 parts of aggregate; 150 to 170 parts of process water; and 8 to 10 parts of a water reducing agent, wherein the water reducing agent is a modified polycarboxylic acid water reducing agent. The preparation method of the long-life rust-proof recycled concrete comprises the following steps: mixing 130-140 parts of Portland cement and 75-85 parts of process water to prepare cement paste; adding a mineral admixture and aggregate into the cement paste to obtain an aggregate mixture; and adding a modified polycarboxylic acid water reducer and the rest of cement and water into the aggregate mixture to obtain the recycled concrete. The method can be used for reducing the water consumption of the recycled concrete and preventing the steel bars from being corroded, and has the advantage of prolonging the service life of the concrete.

Description

technical field [0001] The invention relates to the field of concrete, more specifically, it relates to a high-life rust-proof regenerated concrete. Background technique [0002] Concrete is a general term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Concrete generally refers to the cement concrete obtained by using cement as the cementitious material, sand and stone as the aggregate, water and admixtures in a certain proportion, after stirring, molding and curing, it is called ordinary concrete. [0003] Related technologies can refer to the Chinese invention patent with the authorized publication number CN112110664A, which discloses a method for preparing recycled concrete based on activated water and recycled concrete. The recycled concrete includes recycled concrete aggregate, recycled concrete cement, high-voltage electrostatic field activated water and natural Sand and gravel; the method for preparing rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/26C08F290/06C08F222/06C08F220/56C04B111/26C04B103/30
CPCC04B28/04C08F290/062C04B24/2694C08F290/06C08F222/06C08F220/56C04B2111/26C04B2103/302C04B18/12C04B22/002C04B24/24
Inventor 张宸源施蓓晶陆辉
Owner 南通吉泰新型建材有限公司
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