Construction technique of OGFC on airport expressway

A drainage asphalt, expressway technology, applied in the direction of cohesive pavement paved on site, roads, roads, etc., to achieve the effect of reducing noise, increasing friction coefficient, and improving visibility

Active Publication Date: 2010-04-07
THE THIRD ENG CO LTD OF CCCC SECOND HIGHWAY ENG BUREAU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

OGFC pavement has too many coarse particles and too few fine particles in the mixture. Although a skeleton can be formed, a strong interlocking effect cannot be formed between the particles

Method used

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  • Construction technique of OGFC on airport expressway
  • Construction technique of OGFC on airport expressway
  • Construction technique of OGFC on airport expressway

Examples

Experimental program
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Effect test

Embodiment Construction

[0039] In the embodiment,

[0040] (1) Asphalt preparation, the asphalt adopts Shell 90# base asphalt, and the modifier is Japanese TPS. The dosage is TPS: base asphalt = 12:88, and the test results of technical properties are shown in Table 1:

[0041] Table 1 Test results of technical properties of 90# asphalt

[0042]

[0043] Test results of technical properties of 90# asphalt (plus TPS)

[0044]

[0045] After adding TPS, the indicators of 90# asphalt changed obviously.

[0046] (2) Aggregate preparation: including coarse aggregate and fine aggregate,

[0047] Among them, the coarse aggregates are diorite gneiss gravels of 9.5-16mm and 4.75-9.5mm, which are washed twice for use, and the throughput of 4.75mm is controlled within 5%. The quality and technical requirements of coarse aggregate are shown in Table 2:

[0048] Table 2 Coarse aggregate quality technical requirements

[0049]

[0050]

[0051] The fine aggregate is made of limestone machine-made ...

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Abstract

The invention relates to an asphalt pavement construction technique, in particular to a construction technique of OGFC on airport expressway. The technique at least comprises the steps of: 1) preparing materials; 2) pre-heating part of the materials; 3) mixing the materials according to certain proportion; 4) paving the mixed materials; and 5) carrying out roller compacting for formation. In the materials, asphalt accounts for 4.8%, 11-16 gravel in the aggregate accounts for 44.7%, 7-11 gravel in the aggregate accounts for 25.7%, 4-7 gravel in the aggregate accounts for 7.6%, 0-4 machined-prepared sand accounts for 12.4%, mineral powder accounts for 3.3%, slaked lime accounts for 1.4%, and fiber accounts for 0.1%. Proportion error of each component in the materials can be 3-7%. The asphalt adopts Shell 90# substrate asphalt. The ratio of modifier TPS is: TPS:substrate asphalt equals to 12:88. The fiber adopts polyester fiber with the length being 6mm. The invention provides a construction technique of OGFC on airport expressway with simple technique, convenient construction and lower cost.

Description

technical field [0001] The invention relates to an asphalt pavement construction technology, in particular to an airport expressway drainage asphalt pavement construction technology. Background technique [0002] The drainage asphalt used in drainage asphalt pavement originated from a new type of road surface technology developed in Europe in the 1980s. Initially, its main function was to reduce noise rather than drainage performance. In 1987, Japan introduced this technology from Europe for the first time as a noise reduction road surface for experimental construction. Subsequently, in order to meet the rainy climate conditions in Japan, through continuous technical improvement, the current drainage pavement technology was summarized and formed. At present, China's large-scale drainage asphalt pavement is the 6-lane Xianyang Airport Expressway built in 2003 under the guidance of the Shaanxi Provincial Department of Communications. Since its completion and opening to traffi...

Claims

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Application Information

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IPC IPC(8): E01C7/26E01C19/02E01C19/18E01C19/23
Inventor 高继明梁海
Owner THE THIRD ENG CO LTD OF CCCC SECOND HIGHWAY ENG BUREAU
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