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Ferromanganese ore slag concrete blending material and producing method thereof

A technology of concrete and admixtures, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as only staying, achieve low cost, reduce pollution, and improve the environment

Inactive Publication Date: 2008-07-09
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fineness of manganese slag used for cement admixture is 350m 2 / kg, and they are all added in a compound form, and the relevant research only stays at the stage of mortar research. At present, there is no relevant research report on the preparation of manganese slag into concrete fine admixtures for concrete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The weight percent of the raw material components of the ferromanganese slag admixture is: 100% of the ferromanganese slag.

[0022] (1) Drying 100% by weight waste ferromanganese slag until the moisture content is less than 1%.

[0023] (2) Add 0.05 to 0.5% of the weight of ferromanganese slag as a grinding aid, i.e. triethanolamine, mix well, put it into a ball mill and grind until the specific surface area is 500m 2 / Kg, that is, ferromanganese slag admixture.

[0024] Calculated per cubic meter of concrete, cement 300Kg, ferromanganese slag admixture 33Kg, water-cement ratio 0.54, sand rate 0.46, superplasticizer FDN-9000 3.33Kg

[0025] The 7-day compressive strength of the configured concrete is 20.7MPa, and the 28-day compressive strength is 29.9MPa.

Embodiment 2

[0027] The weight percent of the raw material components of the ferromanganese slag admixture is: 98% of the ferromanganese slag and 2% of natural gypsum.

[0028] (1) Drying the waste ferromanganese slag with a weight percentage of 98% until the moisture content is less than 1%.

[0029] (2) Add 0.2% of the weight of ferromanganese slag as a grinding aid, i.e. sodium carbonate and sodium silicate, mix well, put into a ball mill and grind until the specific surface area is 400m 2 / Kg.

[0030] (3) Add 2% by weight active activator, ie natural gypsum, and mix evenly to obtain ferromanganese slag admixture.

[0031] Calculated per cubic meter of concrete, cement 238Kg, ferromanganese slag admixture 102Kg, water-cement ratio 0.54, sand rate 0.45, superplasticizer FDN-9000 3.4Kg

[0032] The configured concrete has a 7-day compressive strength of 18.2MPa and a 28-day compressive strength of 26.4MPa.

[0033] The slump in the above two cases is about 160mm, and the workability i...

Embodiment 3

[0035] The weight percent of the raw material components of the ferromanganese slag admixture is: 98% of the ferromanganese slag and 2% of natural gypsum.

[0036] (1) Drying the waste ferromanganese slag with a weight percentage of 98% until the moisture content is less than 1%.

[0037] (2) Add 0.3% of the weight of ferromanganese slag as a grinding aid, i.e. triethanolamine and sodium silicate, mix well, put into a ball mill and grind until the specific surface area is 600m 2 / Kg.

[0038] (3) adding 2% by weight active stimulator, ie natural gypsum; mixing evenly to obtain ferromanganese slag admixture.

[0039] Calculated per cubic meter of concrete, cement 520Kg, ferromanganese slag admixture 130Kg, water-cement ratio 0.28, sand rate 0.34, superplasticizer FDN-9000 6.5Kg

[0040] The configured concrete has a 7-day compressive strength of 58MPa and a 28-day compressive strength of 65.7MPa.

[0041] This example shows that the concrete prepared with ferromanganese slag...

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Abstract

The invention discloses an admixture of ferrous manganese ore slag concrete and a method of production of the admixture. Weight percentage of components of the admixture of ferrous manganese ore slag concrete is: the ferrous manganese ore slag of 95 percent-100 percent and an active stimulator of 0 percent-5 percent, wherein the active stimulator is one of natural gypsum, mirabilite and alum. The process comprises: (1) drying the discarded ferrous manganese ore slag till the time when water ratio is less than 1 percent, (2) adding grinding aids into the ferrous manganese ore slag and mixing uniformly the grinding aids and ferrous manganese ore slag, (3) adding the active stimulator, mixing uniformly and placing in a ball grinder for grinding till the specific surface area of 400-600m 2 / Kg According to required concrete intensity, adding amount of micro-powder admixture of ferrous manganese ore slag is 10 percent-40 percent, and the concrete manufactured according to the national standards can meet the requirement of C20-C60 strength class. The concrete not only is perfect in use effects, but also uses a good deal of industrial waste and saves energy, and the invention is capable of being used in civil architectures, highways and bridges.

Description

technical field [0001] The invention relates to a concrete admixture and a production method thereof, in particular to a concrete admixture with a large amount of discarded ferromanganese slag fine powder as the main raw material and a production method thereof. Background technique [0002] For a long time, ultrafine powder has been widely used in food industry, fine chemical industry, commercial concrete, ceramics and other industries due to its outstanding characteristics such as high surface area and small particle size. In the construction industry, with the emergence of high-rise, long-span, and thin-walled building structures, the demand for concrete with good workability, high strength, and high durability is increasing, and high-performance concrete has become a research topic for scientific and technological workers. In recent years, research on high-performance concrete has focused on several aspects such as concrete structure design, low water-cement ratio, activ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/14C04B24/12C04B22/14
CPCC04B18/144C04B40/0046C04B2103/10Y02W30/91C04B20/026C04B20/04C04B28/02C04B2103/52C04B22/143C04B22/147C04B22/148
Inventor 陈平刘荣进马帅贾韶辉安庆锋汪漠李海东王一靓
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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