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Modified premixing plant waste slurry slag and preparation method and application thereof in foam concrete

A foamed concrete and ready-mixed technology is applied in the field of recycling construction waste, which can solve the problems of easy shrinkage and cracking and difficult maintenance, and achieve the effects of reducing capillary channel stress, reducing the risk of cracking, and increasing the stability of the slurry.

Active Publication Date: 2019-12-27
CHINA STATE CONSTR READY MIXED CONCRETE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, especially in the process of forming and hardening, foamed concrete is difficult to maintain and is prone to shrinkage and cracking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a modified ready-mixing plant waste slurry, which is composed of ready-mixing plant waste slurry, modified shale pottery sand, dispersant, fiber and water, wherein:

[0044] The mass ratio of waste slurry slag from the ready-mixing plant to modified shale pottery sand is 1:0.67;

[0045] The mass ratio of waste pulp slag, dispersant and fiber in the ready-mixing plant is 100:1.47:0.40;

[0046] The mass ratio of waste pulp slag and water in the ready-mixing plant is 1:1.5;

[0047] Among them, in the waste pulp residue of the ready-mixing plant, SiO 2 Content 40.5%, CaO content 16.2%, Al 2 o 3 Content 9.7%, Fe 2 o 3 The content of MgO is 3.6%, and the content of MgO is 2.1%.

[0048] The modified shale pottery sand is that the shale pottery sand is infiltrated in 0.3% tea saponin aqueous solution until water absorption is saturated.

[0049] The bulk density of shale pottery sand is 790kg / m 3 , the apparent density is 1580kg / m 3 , The s...

Embodiment 2

[0057] This embodiment provides a modified ready-mixing plant waste slurry, which is composed of ready-mixing plant waste slurry, modified shale pottery sand, dispersant, fiber and water, wherein:

[0058] The mass ratio of waste slurry slag from the ready-mixing plant to modified shale pottery sand is 1:0.67;

[0059] The mass ratio of waste pulp slag, dispersant and fiber in the ready-mixing plant is 100:1.27:0.33

[0060] The mass ratio of waste pulp slag and water in the ready-mixing plant is 1:1.5

[0061] Among them, the SiO in the waste pulp residue of the ready-mixing plant 2 Content 40.5%, CaO content 16.2%, Al 2 o 3 Content 9.7%, Fe 2 o 3 The content of MgO is 3.6%, and the content of MgO is 2.1%.

[0062] The modified shale pottery sand is that the shale pottery sand is infiltrated in 0.4% tea saponin aqueous solution until water absorption is saturated.

[0063] The bulk density of shale pottery sand is 790kg / m 3 , the apparent density is 1620kg / m 3 , The ...

Embodiment 3

[0071] This embodiment provides a modified ready-mixing plant waste slurry, which is composed of ready-mixing plant waste slurry, modified shale pottery sand, dispersant, fiber and water, wherein:

[0072] The mass ratio of waste slurry slag from the ready-mixing plant to modified shale pottery sand is 1:0.81;

[0073] The mass ratio of waste pulp slag, dispersant and fiber in the ready-mixing plant is 100:1.24:0.38

[0074] The mass ratio of waste pulp slag and water in the ready-mixing plant is 1:1.5

[0075] Among them, the SiO in the waste pulp residue of the ready-mixing plant 2 Content 40.5%, CaO content 16.2%, Al 2 o 3 Content 9.7%, Fe 2 o 3 The content of MgO is 3.6%, and the content of MgO is 2.1%.

[0076] The modified shale pottery sand is that the shale pottery sand is infiltrated in 0.5% aqueous solution of tea saponin until saturated with water absorption.

[0077] The bulk density of shale pottery sand is 810kg / m 3 , the apparent density is 1620kg / m 3 ,...

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Abstract

The invention relates to modified waste slurry slag of a premixing plant as well as a preparation method and application of the modified waste slurry slag in foam concrete. The modified waste slurry slag of the premixing plant is composed of waste slurry slag of the premixing plant, modified shale pottery sand, a dispersing agent, fibers and water, and the modified shale pottery sand is obtained by infiltrating shale pottery sand in a tea saponin aqueous solution until the shale pottery sand absorbs water to be saturated. After modification treatment, the overall activity of the waste slurry residues is improved, slurry is more homogeneous, the waste slurry residues can be used as an admixture to be doped into a concrete material, and the utilization efficiency of the waste slurry residuessubjected to filter pressing in a premixing plant is remarkably improved. The modified pre-mixing plant waste slurry slag is used in the foam concrete, so that the slurry stability of the foam concrete can be improved, the properties of crack resistance, heat preservation, strength and the like are improved, and the problems of easiness in cracking, difficulty in maintenance and the like are solved. The preparation method of the modified waste slurry slag of the premixing plant is simple and can be connected with the whole foam concrete production process, modification and production are carried out synchronously, and a technological process and a production mode for efficient utilization of the waste slurry slag of the premixing plant are formed.

Description

technical field [0001] The invention belongs to the field of recovery and utilization of construction waste, and in particular relates to a modified ready-mixing plant waste slurry and its preparation method and application in foamed concrete. Background technique [0002] The waste slurry slag of the ready-mixing plant is the mixture of waste concrete, waste slurry from mixer truck washing, waste slurry from cleaning of ready-mixing equipment in the ready-mixing plant, etc. after passing through the sand separator and filter press. According to incomplete statistics, every The production of 1 cubic meter of concrete will produce about 20kg of waste materials, while my country produces about 1.64 billion cubic meters of concrete every year, and the annual waste material generation reaches 32.8 million tons. Most of the waste materials from ready-mixing plants are disposed of in landfill in my country, occupying a large amount of land resources and causing a heavy burden on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B28/04C04B111/34C04B111/40
CPCC04B28/04C04B40/0039C04B2111/00017C04B2111/343C04B2111/40C04B2201/20C04B2201/32C04B2201/50C04B18/16C04B18/027C04B24/10C04B24/26C04B16/0633C04B24/2623C04B24/383C04B18/18C04B18/24C04B38/10C04B2103/302
Inventor 黄暑年王军赵日煦贺行洋张恒春黄汉洋
Owner CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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