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A kind of C30 recycled aggregate concrete and its preparation method

A technology of recycled aggregate and recycled fine aggregate, applied in the field of building materials, can solve the problems of environmental and personal safety hazards, occupation of large land, deterioration of natural environment, etc., and achieve the effect of saving resources and protecting the environment

Active Publication Date: 2018-07-24
WUHAN YUANJING READY MIXED CONCRETE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most construction wastes are disposed of in traditional ways such as open-air stacking and landfilling, which not only occupy a large amount of land, but also cause great harm to the environment and personal safety.
In addition, mass production of concrete requires massive mining of high-quality natural sand and gravel resources, resulting in serious deterioration of the natural environment
With the reduction of natural sand and stone reserves and the increase of mining costs, there have been many studies on the processing of construction waste into recycled aggregates to replace natural sand and stone to produce concrete. Production of concrete has not yet been reported

Method used

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  • A kind of C30 recycled aggregate concrete and its preparation method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] The present embodiment provides a kind of C30 recycled aggregate concrete, and the amount of each material in each cubic concrete is as follows: 150kg of cement, 90kg of recycled micropowder cement mixture, 40kg of recycled micropowder, 210kg of fly ash, 550kg of machine-made sand, 180kg of recycled fine aggregate, Regenerated coarse aggregate 300kg, gravel 480kg, water 180kg, admixture 6.8g. Specifically, the regenerated micropowder cement mixture is composed of the following components in mass ratio: active construction waste powder: CaCl 2 : desulfurized gypsum: cement clinker is 4: 1.5: 1: 21; the regenerated fine powder is crushed and ground from construction waste to a particle size of less than 80 μm; the regenerated fine aggregate is crushed and ground to a fineness modulus of 2.3~3.0; the recycled coarse aggregate is construction waste crushed and ground to a particle size of 5mm~20mm.

[0024] The preparation method of above-mentioned C30 recycled aggregate c...

Embodiment 2

[0031] The present embodiment provides a kind of C30 regenerated aggregate concrete, and the consumption of each material in every cubic concrete is as follows: 190kg of cement, 50kg of regenerated micropowder cement mixture, 75kg of regenerated micropowder, 180kg of fly ash, 570kg of machine-made sand, 140kg of regenerated fine aggregate, Regenerated coarse aggregate 320kg, gravel 500kg, water 190kg, admixture 6.1g. Specifically, the recycled micropowder, recycled fine aggregate and recycled coarse aggregate are the same as in Example 1; the difference is that the active construction waste powder and CaCl in step 2) 2 , desulfurized gypsum, and cement clinker are ground and mixed according to the mass ratio of 2:2:0.5:21.

[0032] The preparation method of the above-mentioned C30 recycled aggregate concrete is the same as that of Example 1.

Embodiment 3

[0034] The present embodiment provides a kind of C30 recycled aggregate concrete, and the amount of each material in each cubic concrete is as follows: 110kg of cement, 120kg of recycled micropowder cement mixture, 30kg of recycled micropowder, 110kg of fly ash, 490kg of machine-made sand, 210kg of recycled fine aggregate, Regenerated coarse aggregate 200kg, gravel 440kg, water 190kg, admixture 5.8g. Specifically, the regenerated fine powder, regenerated fine aggregate and regenerated coarse aggregate are the same as in Example 1; the difference lies in step 2) the active construction waste powder and CaCl 2 , desulfurized gypsum, and cement clinker are ground and mixed according to the mass ratio of 8:0.3:1:15.

[0035] The preparation method of the above-mentioned C30 recycled aggregate concrete is the same as that of Example 1.

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Abstract

The invention discloses C30 recycled aggregate concrete and a preparation method thereof. Every cubic meter of the C30 recycled aggregate concrete comprises the following materials: 110-220 kg of cement, 30-120 kg of a recycled powder cement admixture, 30-90 kg of recycled powder, 110-220 kg of fly ash, 490-595 kg of machine-made sand, 105-210 kg of recycled fine aggregate, 200-360 kg of recycled coarse aggregate, 440-600 kg of broken stone, 180-190 kg of water and 5.8-7.5 g of an additive. The recycled powder cement admixture is composed of active construction waste powder, CaCl2, flue gas desulfurization gypsum and cement clinker at the mass ratio of 2-8: 0.21-2.1: 0.1-1: 15-21. The C30 recycled aggregate concrete and a preparation method thereof have the following beneficial effects: on the precondition of satisfying concrete usability and durability, salvaging is maximized, resources are saved, and the environment is protected.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a C30 recycled aggregate concrete and a preparation method thereof. Background technique [0002] With the continuous increase in the scale of urban reconstruction and expansion in my country and the rapid advancement of the construction of a new socialist countryside, the demolition of a large number of old buildings and structures has produced a large amount of construction waste such as concrete, bricks, stones, mortar and tiles. According to the estimate of the Ministry of Housing and Urban-Rural Development, by 2020, China will build 30 billion square meters of new housing, and the resulting construction waste will reach at least 5 billion tons. At present, most construction wastes are disposed of in traditional ways such as open-air stacking and landfilling, which not only occupy a large amount of land, but also cause great harm to the environment and personal safety. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B18/167C04B18/08C04B14/06C04B14/02C04B22/124C04B22/145C04B7/00C04B20/0076
Inventor 周晓阳翟志国叶志坚
Owner WUHAN YUANJING READY MIXED CONCRETE CO LTD