Construction technique of OGFC on airport expressway

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...

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. The strength of the mixture is greatly affected by the bonding of the cementitious material, so it is required Asphalt has a high viscosity to ensure the stability of the asphalt mixture

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