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Preparation method of concrete containing fly ash and silt

A technology of fly ash and concrete, which is applied to clay preparation devices, chemical instruments and methods, cement mixing devices, etc., can solve the problems of high-strength concrete cracking hidden dangers, high concrete cracking risks, and high cement consumption, so as to reduce shrinkage and increase cement consumption. Large dosage, the effect of reducing the heat of hydration

Inactive Publication Date: 2015-12-23
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the production and preparation of high-strength concrete, the amount of cement is often high, the heat of hydration is large, the temperature stress and self-shrinkage bring hidden dangers to the cracking of high-strength concrete, especially in large-volume high-strength concrete, the risk of concrete cracking is greater

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  • Preparation method of concrete containing fly ash and silt

Examples

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Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation method that contains fly ash and sludge concrete, comprises the following steps:

[0018] (1) Take urban river dredging silt and process it through removal of impurities, homogenization, drying, and aging, and the moisture content of the silt is not higher than 25%; take waste glass slag and grind it to below 90 mesh to obtain glass slag powder; according to weight The percentage is 80% of sludge, 10% of feldspar powder (with a particle size of 90 mesh or less) and 10% of glass slag powder. After mixing, they are balled by a double-roller granulator, and the raw meal balls are transferred to a rotary kiln for drying. The temperature is 200°C, and the drying time is controlled at 30 minutes. The dried raw meal balls are fired in a rotary kiln at 400°C for 15 minutes, at 1200°C for 6 minutes, and at 800°C for 20 minutes to obtain component A, which is ready for use;

[0019] (2) Add 60% of fly ash, 30% of converter steel slag and 10% of hemihydrate g...

Embodiment 2

[0023] A kind of preparation method that contains fly ash and sludge concrete, comprises the following steps:

[0024] (1) Take urban river dredging silt and process it through removal of impurities, homogenization, drying, and aging, and the moisture content of the silt is not higher than 25%; take waste glass slag and grind it to below 90 mesh to obtain glass slag powder; according to weight The percentage is 80% of sludge, 10% of feldspar powder (with a particle size of 90 mesh or less) and 10% of glass slag powder. After mixing, they are balled by a double-roller granulator, and the raw meal balls are transferred to a rotary kiln for drying. The temperature is 200°C, and the drying time is controlled at 30 minutes. The dried raw meal balls are fired in a rotary kiln in turn at 800°C for 10 minutes, at 1000°C for 10 minutes, and at 500°C for 30 minutes to obtain component A and set aside;

[0025] (2) Add 60% of fly ash, 30% of converter steel slag and 10% of hemihydrate gy...

Embodiment 3

[0029] A kind of preparation method that contains fly ash and sludge concrete, comprises the following steps:

[0030] (1) Take urban river dredging silt and process it through removal of impurities, homogenization, drying, and aging, and the moisture content of the silt is not higher than 25%; take waste glass slag and grind it to below 90 mesh to obtain glass slag powder; according to weight The percentage is 80% of sludge, 10% of feldspar powder (with a particle size of 90 mesh or less) and 10% of glass slag powder. After mixing, they are balled by a double-roller granulator, and the raw meal balls are transferred to a rotary kiln for drying. The temperature is 200°C, and the drying time is controlled at 30 minutes. The dried raw meal balls are fired in a rotary kiln at 600°C for 12 minutes, at 1100°C for 8 minutes, and at 600°C for 25 minutes to obtain component A, which is ready for use;

[0031] (2) Add 60% of fly ash, 30% of converter steel slag and 10% of hemihydrate g...

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Abstract

The present invention relates to a preparation method of concrete containing fly ash and silt. The preparation method comprises: taking 30-35% by weight of gravel, 10-20% by weight of cement, 15-25% by weight of yellow sand, 8-10% by weight of a component A, 3-5% by weight of component B, 0.1-1% by weight of an efficient water reducer, 5-10% by weight of a component C, and 8-10% by weight of water, placing the component A, the component B, the component C, the gravel, the yellow sand and the cement in a concrete stirrer, stirring for 1 min, uniformly mixing the water and the efficient water reducer, pouring the mixture of the water and the efficient water reducer into the concrete stirrer, and carrying out mixing stirring for 3-5 min to obtain the concrete. According to the present invention, the cement consumption is reduced, the low-carbon concrete is prepared, and the hydration heat of the concrete can be significantly reduced so as to reduce the hydration temperature increase of the concrete and reduce the shrinkage caused by the cement hydration, such that the cement consumption is reduced, and the consumption of the slag and the fly ash is increased so as to utilize the more solid waste and provide the environmental protection advantage.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing concrete containing fly ash and silt. Background technique [0002] With the increasing development of national urbanization, the number of construction projects is increasing day by day, and at the same time, the demand for concrete is increasing. When high-strength concrete is used in building structures, it can greatly reduce the size of the section, reduce the self-weight of the structure, and make the concrete structure more lightweight and beautiful. However, in the production and preparation of high-strength concrete, the amount of cement is often high, the heat of hydration is large, temperature stress and self-shrinkage bring hidden dangers to the cracking of high-strength concrete, especially in large-volume high-strength concrete, the risk of concrete cracking is greater. Using a large amount of mineral admixtures in high-strength con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28C5/00C04B28/14C04B18/30
CPCY02W30/91
Inventor 蔡丽朋贠英伟赵红玲罗琴刘晓红
Owner LUOYANG INST OF SCI & TECH
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