Unlock instant, AI-driven research and patent intelligence for your innovation.

A high-performance mineral admixture and its application in concrete

A mineral admixture, high-performance technology, applied in the field of mineral admixtures, can solve the problems of insignificant increase in concrete density and strength, low hydration activity, etc.

Active Publication Date: 2021-09-17
常州坚鹏建材有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing technical solutions have the following defects: the activity of mineral admixtures plays a vital role in improving the performance of concrete, and the above-mentioned invention uses steel slag powder in large quantities as the main ingredient, and the mineral Ca contained in the steel slag 2 (Al,Fe) 2 o 5 ,MgO·2FeO has no hydraulic hardness, relatively low hydration activity, and does not significantly improve the compactness and strength of concrete

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A high-performance mineral admixture and its application in concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A high-performance mineral admixture, including 75kg of blast furnace slag, 10kg of reconstituted converter steel slag and 15kg of lithium slag. Put it into the slag bag, then add reducing agent and conditioning agent and mix evenly. The reducing agent is anthracite, the amount of anthracite added is 0.5kg, the modulator is lime, and the amount of lime added is 1kg; Steel slag, reducing agent and conditioning agent are transported into the electric furnace and start to heat up. At the same time, nitrogen gas is continuously introduced into the electric furnace to remove the air in the electric furnace. The electric furnace is heated to 1400 °C and then kept for 60 minutes. ) Granulation: After the slag is discharged from the electric furnace, it is placed in the slag tank, and the slag tank is placed on the slag tank tipping vehicle through the crane, and the slag tank tipping vehicle is driven by the hydraulic cylinder to tip the slag tank to make the slag fall On the ...

Embodiment 2

[0034] A high-performance mineral admixture, including 80kg of blast furnace slag, 15kg of reconstituted converter steel slag and 5kg of lithium slag. Put it into the slag bag, then add reducing agent and conditioning agent and mix evenly, the reducing agent is carbon powder, the addition of carbon powder is 1.05kg, the preparation agent is aluminum oxide and silicon oxide, the addition of aluminum oxide is 1.5kg, The amount of silicon oxide added is 1.5kg; 2) Preparation: The uniformly mixed converter steel slag, reducing agent and modulating agent are transported to the electric furnace to start heating up, and at the same time, nitrogen is continuously fed into the electric furnace to remove the air in the electric furnace, and the temperature of the electric furnace is raised to 1500 After the heat preservation is completed, the temperature of the electric furnace is cooled to 1250°C; 3) Granulation: After the slag is discharged from the electric furnace, it is placed in th...

Embodiment 3

[0036] A high-performance mineral admixture, including 85kg of blast furnace slag, 5kg of reconstituted converter steel slag and 10kg of lithium slag. Put it into the slag bag, then add reducing agent and conditioning agent and mix evenly. The reducing agent is anthracite and carbon powder. The addition amount of kaolin is 1kg, and the addition amount of kaolin is 0.5kg; 2) Preparation: The uniformly mixed converter steel slag, reducing agent and conditioning agent are transported to the electric furnace to start heating up, and at the same time, nitrogen gas is continuously introduced into the electric furnace to remove the air in the electric furnace , the temperature of the electric furnace is raised to 1550°C and the temperature is kept for 25 minutes. After the heat preservation is completed, the temperature of the electric furnace is cooled to 1300°C; 3) Granulation: After the slag is discharged from the electric furnace, it is placed in the slag tank, and the slag tank i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a high-performance mineral admixture and its application in concrete. According to mass percentage, it includes 75-85% of blast furnace slag, 5-15% of reconstituted converter steel slag and 5-15% of lithium slag, reconstituted converter The preparation method of steel slag is as follows: 1) Mixing: add reducing agent and conditioner to the hot converter steel slag and mix evenly; 2) Modulation: after mixing evenly, transport it to the electric furnace to start heating up, and at the same time, continue to pass protection into the electric furnace For gas, the electric furnace is heated to 1400-1650°C and then kept for 20-60 minutes. After the heat preservation is completed, the temperature of the electric furnace is cooled to 1200-1300°C; 3) Granulation: After the slag is discharged from the electric furnace, the slag falls onto the rotating granulation wheel Water quenching; 4) Magnetic separation: recovering the iron produced in step 3); 5) Grinding: grinding the steel slag after the iron removal treatment in step 4). The invention increases the activity of the steel slag of the converter and the overall activity of the mineral admixture, thereby improving the compactness and strength of the concrete.

Description

technical field [0001] The invention relates to the technical field of mineral admixtures, in particular to a high-performance mineral admixture and its application in concrete. Background technique [0002] In recent years, with the rapid development of high-performance concrete, a large number of applications of mineral admixtures have been driven, especially in commercial concrete, mineral admixtures have become an indispensable component. Mineral admixtures are mostly industrial waste. Adding them to concrete can not only reduce costs, improve the workability and durability of concrete, but also turn waste into treasure and protect the environment. It has become a sustainable development of the concrete industry. measure. At present, the most commonly used mineral admixtures are blast furnace slag, fly ash and silica fume, etc. In the alkaline environment inside the concrete, active mineral admixtures can react with Portland cement to produce calcium hydroxide It react...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/06
CPCC04B40/0042C04B18/141C04B18/142C04B18/144C04B14/022C04B22/064
Inventor 严建强
Owner 常州坚鹏建材有限公司