Dense-graded bitumen surface layer concrete

A technology of concrete and dense grading, which is applied in the field of asphalt dense grading surface concrete, which can solve the problems of high cost and unstable quality, achieve excellent performance, expand the scope of use, save time and cost

Active Publication Date: 2016-03-02
SHANGHAI MCC ENVIRONMENTAL ENG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the prior art, and provide a kind of asphalt densely graded surface course concrete, which is used to overcome the defects of cost, high quality and instability in the large-scale utilization of steel slag in the prior art

Method used

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  • Dense-graded bitumen surface layer concrete
  • Dense-graded bitumen surface layer concrete
  • Dense-graded bitumen surface layer concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This example is a comparative example, which is the common AC-13 dense-grade asphalt concrete in the prior art, wherein the coarse aggregate, fine aggregate and mineral powder are all made of limestone, and the asphalt is SBS modified asphalt, which belongs to I-D category. Concrete content of each raw material component is shown in the following table:

[0043] Material specification

[0044] In this embodiment, asphalt accounts for 4.9% of the total mass of the stone.

Embodiment 2

[0046] In this example, steel slag AC-13 dense-grade asphalt concrete is used, in which limestone is used as the coarse aggregate, steel slag is used as the fine aggregate and mineral powder, and SBS modified asphalt is used as the asphalt, and it is I-D type.

[0047] Material specification

parts by weight

Coarse aggregate (greater than or equal to 9.5mm and less than 13.2mm)

25

Coarse aggregate (greater than or equal to 4.75mm and less than 9.5mm)

27

Fine aggregate (less than 4.75mm)

44

steel slag powder

4

[0048] The content of particles with a particle size not greater than 0.075mm in the steel slag ore powder is greater than 80wt%.

[0049] In this embodiment, asphalt accounts for 4.5% of the total mass of the stone.

Embodiment 3

[0051] In this embodiment, it is steel slag AC-13 dense grade asphalt concrete, wherein the coarse aggregate is limestone, the fine aggregate is 50wt% steel slag and 50wt% limestone, the mineral powder is all steel slag, and the asphalt is SBS modified asphalt, and it is I-D kind.

[0052]

[0053]

[0054] The content of particles with a particle size not greater than 0.075mm in the steel slag ore powder is greater than 80wt%.

[0055] In this embodiment, asphalt accounts for 4% of the total mass of the stone.

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Abstract

The invention provides dense-graded bitumen surface layer concrete which is prepared from stone and bitumen. The mass of the bitumen accounts for 4-5 wt% of the mass of the stone; the stone is prepared from, by weight, 49-53 parts of coarse aggregate, 42-47 parts of fine aggregate and 4-5 parts of mineral powder. According to the scheme, the steel slag mineral powder and the fine aggregate are adopted as dense-graded bitumen concrete aggregate, the grain gradation of the adopted materials is low, and therefore the problem of instability caused by unstable ingredients such as free calcium oxide and free magnesium oxide contained in large-grain steel slag in the prior art is solved; meanwhile, according to the technical scheme, the use range of the steel slag is enlarged greatly, and the maximum content of free calcium in the steel slag is increased to be 5% from 1.5-2% in the prior art.

Description

technical field [0001] The invention relates to the field of building materials, and specifically discloses an asphalt densely graded surface course concrete. Background technique [0002] Steel slag is the waste slag produced by the steelmaking industry. The production volume is about 10%-15% of the crude steel output. It is the main solid by-product of the smelting industry. Its severe comprehensive utilization situation has made countries pay unprecedented attention to the resource utilization of steel slag. Therefore, It is of great significance to study the characteristics of steel slag and develop new comprehensive utilization methods. [0003] As an important composite material, asphalt mixture has been widely used in pavement materials. Scholars at home and abroad have also carried out research on the road performance of asphalt mixture, such as high temperature stability, low temperature crack resistance, water stability, fatigue resistance and so on. In the resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
Inventor 程乐波刘国威吴永津杨刚金强
Owner SHANGHAI MCC ENVIRONMENTAL ENG TECH CO LTD
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