Granulated blast furnace slag powder stabilized steel slag type mixture

Abstract

The invention discloses a granulated blast furnace slag powder stabilized steel slag type mixture which is a mixture formed in a way that granulated blast furnace slag powder with the weight percentage of 3-10 percent is added into steel slag after stabilizing treatment, the doping of coal ash is allowed, and water is added and blended. For the granulated blast furnace slag stabilized steel slag type mixture, the characteristic that steel slag produces calcium hydroxide when meeting water is utilized to excite the granulated blast furnace slag powder to generate gelatination, so that the mixture is cemented and solidified, the compression strength is high, the mechanical blending performance is good, pollution does not exist during blending, the tightness is high, and the durability of the road surface can be improved. Simultaneously, for the gel material of the roadbed mixture, the granulated blast furnace slag powder is selected to replace cement and lime, namely, ironmaking-accompanying resource replaces cement and lime produced by natural limestone, so that waste resources are sufficiently utilized, non-renewable resources are protected, and the emission of carbon dioxide can be reduced.

Description

technical field

[0001] The invention relates to the recycling technology of blast furnace slag waste, in particular to a roadbed mixture which uses blast furnace slag powder instead of cement and lime as a stabilizer and mixes steel slag. Background technique

[0002] At present, the rapid development of highway construction in our country requires a large amount of roadbed materials. The mining of limestone, the main material, will seriously damage ecological vegetation and cause permanent damage to the environment. At the same time, the amount of steel slag discharged by the iron and steel industry is also increasing. In 2010, the national steel output has reached more than 600 million tons, and the corresponding amount of steel slag is also 70 million tons. The piled up steel slag occupies a lot of land and pollutes the environment. However, as a substitute for limestone crushed stone, its effective utilization rate is less than 20%, and there is still a large amount of s...

Examples

Embodiment 1

[0017] Example 1: Steel slag aggregate conforms to the gradation in Table 1, mixed with 5% granulated blast furnace slag powder, no fly ash is added, and mechanically stirred according to the optimum water content. The test results of the technical indicators are compared as shown in Table 2:

Embodiment 2

[0018] Example 2: Steel slag aggregate conforms to the gradation in Table 1, mixed with 10% granulated blast furnace slag powder, 5% fly ash, and mechanically stirred according to the optimum water content. The test results of the technical indicators are compared as shown in Table 2:

[0019] Table 2 Comparison table of technical indicators

[0020]

[0021] It can be seen from Table 2 that using granulated blast furnace slag powder as a stabilizer and solidifying steel slag aggregate as a roadbed material has the advantages of high compressive strength and good mechanical mixing performance, and can completely replace the existing technology of using lime and cement as stabilizers The mixture has great application prospects.

[0022] The implementation and test indicators of the above embodiments are implemented and tested according to the industry standard of "The People's Republic of China Ferrous Metallurgy Industry Standard" (YB / T 4184-2009).

technical field

[0001] The invention relates to the recycling technology of blast furnace slag waste, in particular to a roadbed mixture which uses blast furnace slag powder instead of cement and lime as a stabilizer and mixes steel slag. Background technique

[0002] At present, the rapid development of highway construction in our country requires a large amount of roadbed materials. The mining of limestone, the main material, will seriously damage ecological vegetation and cause permanent damage to the environment. At the same time, the amount of steel slag discharged by the iron and steel industry is also increasing. In 2010, the national steel output has reached more than 600 million tons, and the corresponding amount of steel slag is also 70 million tons. The piled up steel slag occupies a lot of land and pollutes the environment. However, as a substitute for limestone crushed stone, its effective utilization rate is less than 20%, and there is still a large amount of s...

Examples

Embodiment 1

[0017] Example 1: Steel slag aggregate conforms to the gradation in Table 1, mixed with 5% granulated blast furnace slag powder, no fly ash is added, and mechanically stirred according to the optimum water content. The test results of the technical indicators are compared as shown in Table 2:

Embodiment 2

[0018] Example 2: Steel slag aggregate conforms to the gradation in Table 1, mixed with 10% granulated blast furnace slag powder, 5% fly ash, and mechanically stirred according to the optimum water content. The test results of the technical indicators are compared as shown in Table 2:

[0019] Table 2 Comparison table of technical indicators

[0020]

[0021] It can be seen from Table 2 that using granulated blast furnace slag powder as a stabilizer and solidifying steel slag aggregate as a roadbed material has the advantages of high compressive strength and good mechanical mixing performance, and can completely replace the existing technology of using lime and cement as stabilizers The mixture has great application prospects.

[0022] The implementation and test indicators of the above embodiments are implemented and tested according to the industry standard of "The People's Republic of China Ferrous Metallurgy Industry Standard" (YB / T 4184-2009).

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