Standard concrete fine aggregate and preparation thereof

A technology of concrete and fine aggregate, applied in the field of building materials, can solve the problems of a large number of antioxidants and high cost

Inactive Publication Date: 2008-08-27
福州海旺建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And this method will obtain better effect, often needs a large amount of anti-oxidants, and the cost is higher.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: This embodiment takes the preparation of 1000 tons of concrete fine aggregate as an example.

[0020] Get 800 tons of sand (sand is the mixture of coarse, medium and fine sand, fineness modulus FM=1.8-3.6), 199 tons of tuff lava (ie gravel), and 1 ton of calcium nitrite as antioxidant.

[0021] When preparing, put the mixed sand and gravel into the conveyor belt through the hopper, and the conveyor belt sends the material to the top of the crusher that rotates at a high speed (the speed of the motor rotor is 45-65 rpm), and the material passes through the crusher. The top of the material passes through the crusher and falls into the bottom of the crusher. When the material passes through the crusher, it is crushed and processed. When the crusher is crushing, add a 3% calcium nitrite solution and mix it uniformly to obtain the present invention. Concrete fine aggregate described above.

Embodiment 2

[0022] Embodiment 2: This embodiment takes the preparation of 1000 tons of concrete fine aggregate as an example.

[0023] Get 900 tons of sand (sand is the mixture of coarse, medium and fine sand, fineness modulus FM=1.8-3.6), 90 tons of quartzite (ie gravel), and 10 tons of sodium nitrite as antioxidant.

[0024] When preparing, put the mixed sand and gravel into the conveyor belt through the hopper, and the conveyor belt sends the material to the top of the crusher that rotates at a high speed (the speed of the motor rotor is 45-65 rpm), and the material passes through the crusher. The top of the material passes through the crusher and falls into the bottom of the crusher. When the material passes through the crusher, it is crushed and processed. When the crusher is performing crushing work, add 3% sodium nitrite solution and mix it uniformly to obtain the present invention. Concrete fine aggregate described above.

Embodiment 3

[0025] Embodiment 3: This embodiment takes the preparation of 1000 tons of concrete fine aggregate as an example.

[0026] Get 490 tons of sand (sand is the mixture of coarse, medium and fine sand, fineness modulus FM=1.8-3.6), 500 tons of volcanic ash (ie gravel), and 10 tons of chromate as antioxidant.

[0027] When preparing, put the mixed sand and gravel into the conveyor belt through the hopper, and the conveyor belt sends the material to the top of the crusher that rotates at a high speed (the speed of the motor rotor is 45-65 rpm), and the material passes through the crusher. The top of the material passes through the crusher and falls into the bottom of the crusher. When the material passes through the crusher, it is crushed and processed. When the crusher is crushing, add a 3% concentration of chromate solution and mix evenly to obtain the chromate solution of the present invention. Concrete fine aggregate described above.

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Abstract

The invention relates to standard concrete fine aggregate and a process for preparation, which belongs to the building materials field. Sand takes 49%-90%, gravels take 9%-50%, the gravels are non-active rocks, and the grain diameter of the gravels is smaller than 10mm, the mixed sand and gravels is dropped in a conveyer belt, the conveyer belt sends the materials to a crusher which rotates in high speed to crush and process, when the crusher is working, 0.005%-1% basic organic components is added as antioxidant in proportioning by weight, and then the concrete fine aggregate of the invention can be obtained by mixing the mixture uniformly. The invention effectively inhibits alkali-aggregate reaction of the concrete, increases the strength of the concrete, has extremely fine passivation, rust-resistance and protective effect to reinforcing steel bars, and prolongs the service life of buildings.

Description

【Technical field】 [0001] The invention relates to standard concrete fine aggregate and a preparation method thereof, belonging to the field of building materials. 【Background technique】 [0002] With the development of society, the requirements for modern architectural modeling and architectural design are getting higher and higher. At the same time, many conditions have been put forward for the concrete building structure itself. However, in practice, we have also found that the biggest defect of concrete is that it is easy to crack. These cracks are constantly generated and expanded under the external physical and chemical effects, causing concrete carbonation, peeling off of the protective layer, and corrosion of steel bars, which weakens the strength of concrete and reduces its durability. In severe cases, collapse events even occur, endangering the normal use of the structure. There are many reasons for cracks in concrete structures, and all factors can be attributed t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/06C04B14/02
Inventor 蔡德明
Owner 福州海旺建材有限公司
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