A highly active cementitious material based on engineering dregs

A technology of cementitious materials and engineering slag, which is applied in the direction of cement production, etc., can solve the problems of high cost of alkali activator, low grinding efficiency, and easy aggregation of particles, and achieve the elimination of slag aggregation, low production cost, and simple materials Easy to get effect

Active Publication Date: 2022-03-01
深圳市衡骏环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still the following problems: (1) the cost of the alkali activator in this method is relatively high; (2) when the engineering slag is crushed, the particles are easy to aggregate, and the grinding efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The highly active cementitious material based on engineering dregs provided in this example is prepared by the following method:

[0022] (1) Mix and grind 70 parts of engineering dregs, 10 parts of siliceous tailings and 10 parts of fly ash to obtain a mixed powder with a specific surface area of ​​360-440m 2 / kg; (2) Put 10 parts of mixed powder and kiln dust into a sagger, and calcinate in a calcining kiln at 700-800°C for 2-3 hours; (3) Grind the calcined product into powder, Obtain highly active gelling material, the specific surface area of ​​the highly active gelling material is 420-500m 2 / kg.

[0023] The above-mentioned high-activity cementitious material is mixed into P·O52.5 cement, and the 28d compressive strength of the cement with 25% high-active cementitious material is 44.3Mpa, and the 28d compressive strength of P·O52.5 cement is 54.6 MPa, then the activity index A of cement with 25% high activity cementitious material 28 is 81%, the highly active c...

Embodiment 2

[0025] The highly active cementitious material based on engineering dregs provided in this example is prepared by the following method:

[0026] (1) Mix and grind 75 parts of engineering dregs, 5 parts of siliceous tailings and 5 parts of fly ash to obtain a mixed powder with a specific surface area of ​​360-440m 2 / kg; (2) put 15 parts of the mixed powder and kiln dust into the sagger, and calcinate in the calcining kiln at 700-800°C for 2-3 hours; (3) grind the calcined product into powder, Obtain highly active gelling material, the specific surface area of ​​the highly active gelling material is 420-500m 2 / kg.

[0027] The above-mentioned high-activity cementitious material is mixed in the P · O52.5 cement, and the activity index A of the cement of the high-activity cementitious material that admixture is 25% 28 was 78%, the highly active cementitious material prepared in this example has relatively high gelling activity, and the preliminary activity of concrete is high....

Embodiment 3

[0029] The highly active cementitious material based on engineering dregs provided in this example is prepared by the following method:

[0030] (1) Mix and grind 75 parts of engineering dregs, 10 parts of siliceous tailings and 10 parts of fly ash to obtain a mixed powder with a specific surface area of ​​360-440m 2 / kg; (2) Put 10 parts of mixed powder and kiln dust into a sagger, and calcinate in a calcining kiln at 700-800°C for 2-3 hours; (3) Grind the calcined product into powder, Obtain highly active gelling material, the specific surface area of ​​the highly active gelling material is 420-500m 2 / kg.

[0031] The above-mentioned high-activity cementitious material is mixed in the P · O52.5 cement, and the activity index A of the cement of the high-activity cementitious material that admixture is 25% 28 was 77%, the highly active cementitious material prepared in this example has relatively high gelling activity, and the initial activity of concrete is high.

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Abstract

The invention provides a highly active cementitious material based on engineering dregs, the raw materials of which include the following components, each component and the mass parts of each component are: 70-80 parts of engineering dregs, 5 parts of siliceous tailings ~10 parts, 5~10 parts of fly ash, 10~15 parts of kiln dust; it is prepared by the following method: (1) mixing and grinding engineering dregs, siliceous tailings and fly ash to obtain mixed powder (2) Put the mixed powder and kiln dust into the calcination container, and calcine in the calcination kiln at 700-800°C for 2-3 hours; (3) Grind the calcined product into powder to obtain high activity gelling material. The material of the high-activity cementitious material is simple and easy to obtain, and the resource utilization of engineering dregs and siliceous tailings is realized, and the production cost is low. Activity, can significantly improve the early activity of concrete.

Description

technical field [0001] The invention belongs to the technical field of cementitious materials, and in particular relates to a highly active cementitious material based on engineering dregs. Background technique [0002] With the rapid development of urbanization in my country, a large amount of construction waste has been generated in recent years. According to the definition of my country's industry standard "Technical Standards for Construction Waste Disposal", construction waste refers to the construction, construction units newly built, rebuilt, expanded and demolished various buildings, structures, pipe networks, etc. Discards and other wastes can be divided into five categories: engineering dregs, engineering mud, engineering waste, demolition waste and decoration waste. In the future, due to the large-scale development of urban underground space, the disposal and resource utilization of huge amounts of construction waste will still be the focus and difficulty of const...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/28C04B7/26C04B7/24C04B7/38C04B7/44
CPCC04B7/28C04B7/26C04B7/24C04B7/38C04B7/44Y02P40/10
Inventor 王文圣黄修林舒畅
Owner 深圳市衡骏环保科技有限公司
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