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Composite ground granulated blast furnace slag for concrete

A technology of blast furnace slag powder and granulated blast furnace slag, which is applied in the field of construction, can solve the problems of low early strength, difficulty, and poor grindability of fly ash, achieve good social and economic benefits, improve workability, and improve mechanical properties Effects on Performance and Durability

Inactive Publication Date: 2013-09-18
HAINAN LANDAO ENVIRONMENTAL PROTECTION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, slag micropowder has a wide range of sources, moderate price, a large amount of substitute cement, and high strength in the later stage, but its grindability is poor. It is difficult to produce high specific slag micropowder with the existing cement plant ball mill, so the price is lower than that of pulverized coal. High ash, but low early strength of fly ash

Method used

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  • Composite ground granulated blast furnace slag for concrete
  • Composite ground granulated blast furnace slag for concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The chemical compositions of granulated blast furnace slag, domestic waste incineration bottom slag and green mud are shown in Table 1:

[0017] Table 1 Chemical composition of various components

[0018]

[0019] Weigh 85 kg of granulated blast furnace slag, 5 kg of domestic waste incinerator bottom slag, 5 kg of combined material and 5 kg of active activator according to the formula ratio and mix them into the ball mill system for grinding processing. The surface area of ​​the milled powder is controlled at 450m 2 / kg~550m 2 / kg, during the grinding process, the fluidized furnace is used to convey hot air to dry the incoming grinding materials, and at the same time, in order to ensure the normal storage and transportation of the outgoing grinding materials, it is necessary to ensure that the moisture content of the outgoing grinding materials is less than 0.5%.

Embodiment 2

[0021] The chemical compositions of the granulated blast furnace slag, the domestic waste incineration bottom slag and the green mud are the same as in the first embodiment.

[0022] Weigh 68 kg of granulated blast furnace slag, 20 kg of domestic waste incinerator bottom slag, 10 kg of combined material and 2 kg of active activator according to the formula ratio and mix them into the ball mill system for grinding processing. The surface area of ​​the milled powder is controlled at 450m 2 / kg~550m 2 / kg, during the grinding process, the fluidized furnace is used to convey hot air to dry the incoming grinding materials, and at the same time, in order to ensure the normal storage and transportation of the outgoing grinding materials, it is necessary to ensure that the moisture content of the outgoing grinding materials is less than 0.5%.

Embodiment 3

[0024] The chemical compositions of the granulated blast furnace slag, the domestic waste incineration bottom slag and the green mud are the same as in the first embodiment.

[0025] Weigh 50 kg of granulated blast furnace slag, 45 kg of domestic waste incinerator bottom slag, 3 kg of combined material and 2 kg of active activator according to the formula ratio and enter the ball milling system for grinding processing, and the surface area of ​​the milled powder is controlled at 450m 2 / kg~550m 2 Between / kg, during the grinding process, the fluidized furnace is used to transport hot air to dry the incoming grinding materials. At the same time, in order to ensure the normal storage and transportation of the outgoing grinding materials, it is necessary to ensure that the moisture content of the outgoing grinding materials is less than 0.5%, and then mix them to obtain concrete. Composite blast furnace slag powder.

[0026] The composite micropowders obtained in Examples 1, 2, ...

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Abstract

The invention relates to a composite ground granulated blast furnace slag for concrete. The slag is prepared by grinding utilizing grinding equipment and then uniformly mixing household garbage incinerator bottom slag, granulated blast-furnace slag, mixed materials and an activity activator, the specific surface area of the slag is 450m<2> / kg-550m<2> / kg, and the water content is less than 0.5%. The production technology is simple, industrial wastes such as the household garbage incinerator bottom slag, the granulated blast-furnace slag and green mud which can be greatly and easily obtained as main raw materials, the optimal superimposed effects and grain composition of all the components can be fully exerted through optimal compounding, and the obtained composite ground granulated blast furnace slag can be used for substituting part cement in concrete, so that resources and energy sources are saved, the industrial production is benefited, environmental protection, energy saving and emission reduction are benefited, a new method is developed for the resource utilization of the municipal solid waste incinerator bottom slag, and the slag has a good social effect and a good economic benefit.

Description

technical field [0001] The invention belongs to the construction field and relates to a construction material, in particular to a composite blast furnace slag micropowder for concrete. Background technique [0002] With the development of concrete technology today, in addition to considering the technical problems of concrete cracking, brittleness, and durability, it must also combine the sustainable development requirements of human society, from the perspective of saving natural resources and energy and protecting the environment. Development and Apply new technologies, actively utilize solid waste, reduce cement consumption, greatly increase the service life of buildings, achieve energy conservation and emission reduction goals, take the road of "green" development, and make positive contributions to the green development of my country's construction industry . [0003] In recent years, due to urban population growth, economic development and improvement of living standard...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/147C04B7/28
CPCY02P40/10
Inventor 杨君陆平刘明旺范桂能张楠楠刘燕
Owner HAINAN LANDAO ENVIRONMENTAL PROTECTION IND
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