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Cement stabilized macadam layer for highway subgrade and preparation method and application thereof

A cement-stabilized gravel and cement-stabilized technology, applied in roads, roads, buildings, etc., can solve the problems of insufficient waste slag output, low utilization of high-carbon ferrochrome slag, insufficient economic benefits, etc., and reduce mining applications. , Great social and environmental benefits, the effect of protecting natural resources

Inactive Publication Date: 2020-10-02
CHINA UNIV OF MINING & TECH (BEIJING) +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large voids and poor durability of coal gangue, its use in road construction is limited and it cannot be used on a large scale
[0005] CN103708787A discloses a cement-stabilized macadam layer for the base course of the highway pavement, which produces a high-carbon ferrochrome slag aggregate by treating it with high-carbon ferrochrome alloy slag, and replaces natural aggregates with water and cement to make a cement-stabilized macadam layer. However, the use of high-carbon ferrochrome slag in this scheme is not very wide. The output of waste slag cannot meet the demand of road construction, and the waste slag needs to be processed in a later stage before it can be used. This scheme has insufficient economic benefits and cannot be widely used.

Method used

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  • Cement stabilized macadam layer for highway subgrade and preparation method and application thereof
  • Cement stabilized macadam layer for highway subgrade and preparation method and application thereof
  • Cement stabilized macadam layer for highway subgrade and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Weigh and mix 5.5kg of coal gangue aggregate according to 58.24 parts of coal gangue coarse aggregate and 32.76 parts of coal gangue fine aggregate, wherein the composition of coal gangue aggregate satisfies 1#: 30%, 2#: 20%, 3#: 14%, 4#: 14%, 5#: 22%. Add 3.8 parts of cement and 5.2 parts of water to the obtained mixture, mix well to obtain a cement-stabilized coal gangue mixture, and measure its dry density and water content.

[0052] The dry density and water content are measured as follows: the compaction experiment is carried out with reference to the "Test Regulations for Highway Engineering Inorganic Binder Stable Materials" (JTGE51-2009). The compaction experiment uses a 150x150mm compaction cylinder (with a spherical base). The specific steps are: use the quartering method to add to the cylinder three times. The compaction of the first layer of samples was carried out on the compaction instrument (the compaction times were 98 times). After the first layer is ...

Embodiment 2

[0055] Same as Example 1, except that the ratio of each raw material is 56.96 parts of coal gangue coarse aggregate, 32.04 parts of coal gangue fine aggregate, 5.7 parts of cement, and 5.3 parts of water. The results are shown in Table 6.

Embodiment 3

[0057] Same as in Example 1, except that the proportions of the raw materials are 55.68 parts of coal gangue coarse aggregate, 31.32 parts of coal gangue fine aggregate, 7.5 parts of cement, and 5.5 parts of water. The results are shown in Table 6.

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Abstract

The invention provides a cement stabilized macadam layer for a highway subgrade; the cement stabilized macadam layer comprises coal gangue aggregate, cement and water, wherein the coal gangue aggregate comprises 53-63 parts of coal gangue coarse aggregate and 28-38 parts of a coal gangue fine aggregate, 3-9 parts of cement and 4-8 parts of water, and the coal gangue aggregate is derived from tunneling coal gangue. According to the cement stabilized macadam layer, industrial solid waste coal gangue is adopted to completely replace natural aggregate; when used for highway pavement base engineering, the macadam layer has good pressure resistance, can also meet the road construction demand on the basis of meeting the road construction requirements, greatly reduces the exploitation and application of natural resources, and has good economic benefits and environmental protection benefits.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a cement-stabilized crushed stone layer for road subgrades, a preparation method and application thereof. Background technique [0002] With the rapid development of my country's modernization construction, the demand for road infrastructure in my country is increasing, and the demand for the quality and amount of pavement materials in road engineering is constantly increasing. The supply of natural sand and gravel alone cannot meet the increasing construction demand. The development and use of natural sand and gravel materials will not only waste a lot of manpower and material resources, but also cause serious damage to the ecological resources and environment. This is contrary to the basic policy of the "Two Mountains Theory", does not meet the requirements of sustainable development, and does not meet the needs of modern highways. Construction has higher and higher requirements f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E01C3/00E01C3/04
CPCC04B28/04C04B2111/0075E01C3/00E01C3/04C04B18/12
Inventor 王栋民张明房奎圳刘泽刘虎崔源声田桂萍乔坤元袁宁杨志波黄晓研
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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