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Concrete and preparation method thereof

A concrete and mixture technology, applied in the field of concrete, can solve the problems of soil loss of activity, pollution of the environment, occupation of cultivated land, etc.

Active Publication Date: 2021-05-18
东莞市建工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the rapid development of my country's economy and the large-scale construction of infrastructure, a large amount of construction waste has been generated due to construction and demolition, and only a small number of resources can be used for resource utilization. Most of the construction waste is treated with The method of dumping or landfilling not only occupies arable land and pollutes the environment, but also the alkaline waste concrete will deactivate large areas of soil

Method used

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  • Concrete and preparation method thereof
  • Concrete and preparation method thereof
  • Concrete and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1

[0051] In this preparation example, the silicon airgel powder is made of hydrophilic silicon airgel powder with a particle size of 1.2mm; The diameter of the whiskers is 0.15 μm; the asbestos fiber is selected as the asbestos fiber with a fiber fiber size of 18 mm. The insulation filler is specifically made by the following methods:

[0052] S1: When 35kg of silicon airgel powder is placed in a plasma surface treatment machine for treatment, the processing gas includes argon 150SCCM; nitrogen 100SCCM, and the silicon airgel powder is surface treated for 60s under the condition of a vacuum of 45Pa

[0053] S2: After weighing 5 kg of asbestos fibers and 1 kg of silicon carbide whiskers, stir in a powder particle mixer at a speed of 500 r / min until uniformly mixed to obtain a dry powder mixture;

[0054] S3: Divide the silicon airgel powder obtained in the step S1 into 4 equal parts, each divided into 8.75kg, add it into the powder particle mixer of S2 in 4 times, stir at a spee...

preparation example 2-4

[0057] The difference between Preparation Examples 2-4 and Preparation Example 1 is that the weight ratios of silica airgel powder, asbestos fibers and silicon carbide whiskers are different, and the weight parts and proportioning ratios are shown in Table 2.

[0058] Table 2. Preparation example 2-4 raw material parts by weight and proportioning table

[0059] components Preparation Example 1 Preparation example 2 Preparation example 3 Preparation Example 4 Silica airgel powder / kg 35 18 25 32 Asbestos fiber / kg 5 15 10 6 SiC whisker / kg 1 1 1 1 Ratio of parts by weight 35：5：1 18:15：1 25:10:1 32:6:1

preparation example 5

[0061] The difference between this preparation example and preparation example 4 is that the silica airgel powder in this preparation example is hydrophobic silica airgel powder.

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Abstract

The invention relates to the technical field of concrete, and particularly discloses concrete and a preparation method and application thereof. The concrete is prepared from recycled coarse aggregate, waste glass sand, cement, a polycarboxylic acid water reducer, talcum powder and thermal insulation filler. The preparation method of the thermal insulation filler comprises the following steps: carrying out plasma surface treatment on the silica aerogel powder, uniformly dividing the silica aerogel powder into multiple parts, and mixing the multiple parts with the asbestos fibers and the silicon carbide whiskers so that the silica aerogel powder is fully dispersed in a dry powder mixture of the asbestos fibers and the silicon carbide whiskers and is wrapped by a three-dimensional structure of the asbestos fibers and the silicon carbide whiskers. The special space structure is realized so that the thermal insulation property of the silica aerogel powder is enhanced; the concrete provided by the invention has the advantage of low heat conductivity coefficient.

Description

technical field [0001] This application relates to the technical field of concrete, more specifically, it relates to a concrete and its preparation method. Background technique [0002] With the rapid development of my country's economy and the large-scale construction of infrastructure, a large amount of construction waste has been generated due to construction and demolition, and only a small number of resources can be used for resource utilization. Most of the construction waste is treated with The way of dumping or landfilling not only occupies arable land and pollutes the environment, but also the alkaline waste concrete will deactivate large areas of soil. At the same time, the consumption of natural resources such as sand and gravel in our country is huge. According to statistics, only concrete and mortar consume more than 10 billion tons of sand and gravel materials every year. Therefore, how to effectively utilize construction waste, especially recycled waste concre...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/08C04B111/40
CPCC04B28/04C04B2111/00017C04B2111/40C04B2201/50C04B2201/32C04B18/0427C04B14/042C04B2103/302C04B18/16C04B14/064C04B14/383C04B14/40C04B38/08
Inventor 项卫民龙滕虹汤俊
Owner 东莞市建工集团有限公司
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