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A kind of compressive and anti-carbonation recycled concrete and preparation method thereof

A recycled concrete and anti-carbonation technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of reduced compressive strength of recycled concrete, aggravated corrosion of steel bars, and reduced anti-carbonation ability, and achieves improved Anti-carbonization ability, improve compressive strength, and reduce the effect of rust

Active Publication Date: 2022-07-29
深圳市京基混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, reinforced concrete structures in the marine environment are exposed to the atmosphere most of the time, and carbon dioxide in the atmosphere can penetrate into the interior of the concrete through the pores on the surface of the hardened concrete. Carbon dioxide will destroy the high alkaline environment inside the concrete, and then destroy the oxidation of the steel surface membrane
[0005] Abandoned concrete blocks have a rich pore structure. After the recycled concrete is formed, the carbonation resistance of the recycled concrete decreases. Under the joint action of carbon dioxide and chloride ions, the corrosion of the steel bars in the recycled concrete is aggravated, and the destruction of the steel bars makes the recycled concrete The compressive strength of the

Method used

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  • A kind of compressive and anti-carbonation recycled concrete and preparation method thereof
  • A kind of compressive and anti-carbonation recycled concrete and preparation method thereof
  • A kind of compressive and anti-carbonation recycled concrete and preparation method thereof

Examples

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Embodiment 1

[0057] A compressive and anti-carbonation recycled concrete, comprising the following raw materials: ordinary Portland cement 310kg; fly ash 57kg; recycled coarse aggregate 980kg; fine aggregate 690kg; water reducing agent 4kg; water 130kg; nano-silica 40kg; sodium carboxymethyl cellulose 5kg; 4A zeolite 24kg.

[0058] Among them, the strength grade of ordinary Portland cement is 52.5; the continuous particle size of recycled coarse aggregate is 5-20mm; the particle size of nano-silica is 20nm.

[0059] A preparation method of compressive and anti-carbonation recycled concrete, comprising the following steps:

[0060] S1, take ordinary Portland cement, fine aggregate and water according to the above weight, stir the ordinary Portland cement, fine aggregate and two-thirds of the water by a mixer, and stir at a speed of 1.6m / s linear speed 45s, until the mixing is uniform, and the mixture A is obtained; the regenerated coarse aggregate, sodium carboxymethylcellulose, 4A zeolite...

Embodiment 2

[0064] The difference between Example 2, Example 3 and Example 1 is that the weight and specification of each raw material are different, see Table 1 for details.

Embodiment 4

[0066] The difference between this example and Example 2 is that the continuous particle size of the regenerated coarse aggregate in this example is 5-25 mm, see Table 1 for details.

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Abstract

The present application relates to the field of recycled concrete, and specifically discloses a compression-resistant and anti-carbonation recycled concrete and a preparation method thereof. A compressive and anti-carbonation recycled concrete comprises the following raw materials by weight: 310-340 parts of ordinary Portland cement; 46-57 parts of fly ash; 980-1020 parts of recycled coarse aggregate; and 690-750 parts of fine aggregate; 4-7 parts of water reducing agent; 130-165 parts of water; 40-60 parts of nano silicon dioxide; 5-8 parts of sodium carboxymethyl cellulose; 24-30 parts of 4A zeolite; Evenly, recycled concrete is obtained. The compressive and anti-carbonation recycled concrete of the present application and the preparation method thereof have the advantages of improving the carbonation resistance of the recycled concrete, thereby improving the compressive strength of the recycled concrete.

Description

technical field [0001] The present application relates to the field of recycled concrete, and more particularly, to a compressive and anti-carbonation recycled concrete and a preparation method thereof. Background technique [0002] Recycled concrete refers to the use of discarded concrete blocks as recycled coarse aggregates. After crushing, cleaning and grading, they are mixed with gradation in a certain proportion, partially or completely replacing natural coarse aggregates such as sand and gravel, and then adding cement, water, etc. The new concrete is made, which realizes the reuse of waste resources. [0003] In the related art, reinforced concrete structures have the advantages of both concrete and steel, and are widely used in marine development projects. During construction and use, chloride ions in the marine environment adhere to the surface of the reinforced concrete structure along with sea breeze, salt spray and precipitation, and enter the interior of the con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B24/38C04B24/08C04B22/14C04B18/16C04B14/04
CPCC04B28/04C04B24/383C04B14/047C04B22/149C04B24/085C04B18/167C04B2201/50C04B18/08C04B18/16C04B2103/302C04B14/062C04B20/008C04B14/06Y02W30/91
Inventor 林佳豪
Owner 深圳市京基混凝土有限公司