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High-intensity low-crack cement-stabilized graded macadam and preparation method thereof

A cement-stabilized, graded crushed stone technology, applied in roads, roads, buildings, etc., to achieve the effect of improving bearing capacity and prolonging service life

Active Publication Date: 2012-06-20
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] It is worth pointing out that technical measures that can simultaneously increase the strength of cement-stabilized macadam materials and reduce the rate of shrinkage and cracking of cement-stabilized macadam bases, and have better practical effects in physical engineering, have not yet been reported.

Method used

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  • High-intensity low-crack cement-stabilized graded macadam and preparation method thereof
  • High-intensity low-crack cement-stabilized graded macadam and preparation method thereof
  • High-intensity low-crack cement-stabilized graded macadam and preparation method thereof

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Embodiment 1

[0036] Concrete steps of the present invention are as follows:

[0037] (1) Give the grading range of cement stable grading crushed stone mineral material with high strength and small drying shrinkage coefficient

[0038] High-strength, low-crack cement-stabilized graded crushed stone, including graded mineral materials, the mineral material gradation should be within the grading range given in the table below, and the 4.75mm sieve hole pass rate should be controlled at 35%- 40%, and the crushing value of coarse aggregate with a particle size of 4.75 mm or more is not greater than 22%.

[0039] Table 1: High-strength, low-crack cement stable grading crushed stone mineral material grading range (cumulative pass percentage%)

[0040] Sieve hole(mm)

26.5

19

13.2

9.5

4.75

2.36

1.18

0.6

0.3

0.15

0.075

upper limit%

100

85

71

60

40

29

21

15

11

...

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Abstract

The invention relates to high-intensity low-crack cement-stabilized graded macadam and a preparation method thereof, belonging to the field of highway engineering design. The mineral aggregate gradation of the high-intensity low-crack cement-stabilized graded macadam is 5-6 grade, wherein the 4.75mm pass ratio is 35-40%, and the crushing value of large-particle macadam is lower than 22%. By adopting the above technical scheme, the invention has the following beneficial effects: (1) the 7d unconfined compressive strength of the cement-stabilized graded macadam is increased to 6-8MPa; and (2) the coefficient of shrinkage of the cement-stabilized graded macadam is decreased to 0.008-0.013. Therefore, the technical advantages of high intensity and low shrinkage crack of mixture are achieved; the macadam of the invention is applied to building the road surface with long service life, in this way, the bearing property of the road surface is improved, and the service life of the road surfaceis prolonged.

Description

technical field [0001] The invention belongs to the technical field of highway engineering, and specifically relates to a cement-stabilized graded crushed stone material and a preparation process thereof. The material has high strength and low shrinkage cracking rate, thereby improving the overall bearing capacity of the cement-stabilized graded crushed stone base It can be used to build long-life asphalt pavement and cement pavement with semi-rigid base. Background technique [0002] The semi-rigid base, especially the cement-stabilized gravel base, has the advantages of excellent mechanical properties, good plate performance, high rigidity, strong bearing capacity, suitable work performance and convenient construction technology. Compared with other types of bases, it is more Adapt to the rapid development of today's large-tonnage vehicle transportation and traffic volume. The well-designed semi-rigid cement-stabilized macadam base can meet the technical requirements of "...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00E01C3/02
Inventor 王旭东沈国辉周兴业郭朝阳张蕾张宇
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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