Steel slag powder water stabilized base material and preparation method thereof

A technology of water-stabilized base material and steel slag powder, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., to achieve the effect of saving storage space, reducing raw material and construction costs, and reducing possibilities

Active Publication Date: 2015-04-22
SHANGHAI MCC ENVIRONMENTAL ENG TECH CO LTD +1
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the free calcium oxide f-CaO and free magnesium oxide f-MgO in the steel slag, there will be stability problems. The steel slag is directly used as aggregate for the water-stabilized base. How to solve the stability problem of the steel slag itself is very important How to effectively deal with the interaction and chemical reaction between steel slag and binder requires further in-depth research and needs to be solved urgently

Method used

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  • Steel slag powder water stabilized base material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] like figure 1As shown, take the dry material components by weight percentage: 4wt% cement, 13wt% steel slag powder, 83wt% crushed stone, put them into the mixer and stir evenly for 10±2 minutes; then add water, and stir evenly for 10±2 minutes , and then, the mixed material is transported into the extrusion molding machine by a feeding truck for extrusion molding, and naturally cured for 7 days or more after molding, to be tested. Wherein, the weight percentage of the amount of water added to the dry material is 1:22, that is, the amount of water added is about 4.5 wt%. In addition, the particle size specifications of steel slag powder are: particle size less than 0.125mm=35wt%, particle size 0.125-0.3mm=35wt%, particle size 0.3-0.5mm=25wt%, particle size 0.5-0.8mm=5wt% %. Performance conditions of steel slag powder: f-CaO<5wt%, f-MgO<13wt%. See Table 1 for specific data.

Embodiment 2

[0050] like figure 1 As shown, take the dry material components by weight percentage: 3wt% cement, 13wt% steel slag powder, and 84wt% crushed stone, put them into the mixer and stir evenly for 10±2 minutes; then add water and stir evenly for 10±2 minutes , and then, the mixed material is transported into the extrusion molding machine by a feeding truck for extrusion molding, and naturally cured for 7 days or more after molding, to be tested. Wherein, the weight percentage of the amount of water added to the dry material is 1:20, that is, the amount of water added is 5wt%. In addition, the particle size specification of steel slag powder is: particle size less than 0.125mm=35wt%, particle size 0.125-0.3mm=33wt%, particle size 0.3-0.5mm=22wt%, particle size 0.5-0.8mm=10wt% %. Performance conditions of steel slag powder: f-CaO<5wt%, f-MgO<13wt%. See Table 1 for specific data.

Embodiment 3

[0052] like figure 1 As shown, take the dry material components by weight percentage: 4wt% cement, 26wt% steel slag powder, and 70wt% crushed stone, put them into the mixer and stir evenly for 10±2 minutes; then add water and stir evenly for 10±2 minutes , and then, the mixed material is transported into the extrusion molding machine by a feeding truck for extrusion molding, and naturally cured for 7 days or more after molding, to be tested. Wherein, the weight percentage of the amount of water added to the dry material is 1:21, that is, the amount of water added is about 4.8wt%. In addition, the particle size specification of steel slag powder is: particle size less than 0.125mm=32wt%, particle size 0.125-0.3mm=32wt%, particle size 0.3-0.5mm=21wt%, particle size 0.5-0.8mm=15wt% %. Performance conditions of steel slag powder: f-CaO<5wt%, f-MgO<13wt%. See Table 1 for specific data.

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Abstract

The invention provides a steel slag powder water stabilized base material. The raw materials include a dry material and water. The dry material comprises the following components: 3-4wt% of cement, 13-26wt% of steel slag powder, and 70-84wt% of gravel. An appropriate amount of water is added. The invention also discloses a preparation method and application of the steel slag powder water stabilized base material. According to the steel slag powder water stabilized base material and its preparation method provided by the invention, the water stabilized base material are improved, and new utilization ways for steel slag are opened up. The material has good slab entirety, high early strength, crack resistance, and strong deformation resistance, all the performance indicators are in line with the requirements of relevant standards, and the steel slag powder as industrial solid waste is employed to serve as the fine aggregate in the water stabilized base material, thus turning waste into treasure, protecting the environment, and serving multiple purposes.

Description

technical field [0001] The invention belongs to the technical field of new building materials, and in particular relates to a steel slag powder water-stabilized base material and a preparation method thereof. Background technique [0002] The research on water-stabilized base materials in our country began in the 1970s, and has developed rapidly in the following decades. With the continuous development of traffic, the quality requirements of the road are getting higher and higher, so the material of the road structure base has become the main factor affecting the quality and service life of the road. Compared with lime soil, water-stabilized base material is a good base material. Because the water-stabilized base has the characteristics of high strength, good stability, good durability, high early strength, good board body and frost resistance, and strong deformation resistance, it can be widely used in roads at all levels base or subbase. [0003] Steel slag is a waste s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/14
CPCY02W30/91
Inventor 陆珺吴永津王幼琴韩甲兴金强
Owner SHANGHAI MCC ENVIRONMENTAL ENG TECH CO LTD
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