Embedded pouring asphalt concrete

Abstract

The invention relates to paving structures and materials for pavement engineering, in particular to embedded pouring asphalt concrete. The coarse aggregate dosage of the embedded pouring asphalt concrete is reduced by 10-30 percent than the coarse aggregate dosage in the mixing proportion design of ordinary pouring asphalt concrete, and the embedded pouring asphalt concrete is prepared through the following steps of: mixing the coarse aggregate, uniformly stirring at the temperature of 180-220 DEG C, spreading and leveling by using a spreading machine, then spreading a first layer of aggregate with the granularity of 10-15mm and the dosage accounting for 10-25 percent of the quality of the designed pouring asphalt concrete, then spreading a second layer of aggregate with the granularity of 5-10mm and the dosage accounting for 10-15 percent of the quality of the designed pouring asphalt concrete and rolling once through a combined wheel road roller of which bearing wheel walking railways at both sides are provided with lower limited positions and can vibrate to form the embedded pouring asphalt concrete. The coarse aggregate dosage of the embedded pouring asphalt concrete is reduced before the mixture is spread to improve the fluidity, thereby lowering the construction temperature and improving the fatigue durability; the dosage of spread broken stones is increased, and the compaction process and the power are adjusted and increased, thereby ensuring the embedding ratio of the broken stones and improving the high temperature stability.

Description

technical field [0001] The invention relates to a pavement structure and material for road surface engineering, in particular to an embedded pouring asphalt concrete. technical background [0002] Poured asphalt concrete, known as Guss Asphalt (GA) in English, belongs to the category of asphalt concrete, that is, it has the properties of asphalt concrete, but the pouring construction method is different from the ordinary asphalt concrete construction process. Therefore, cast asphalt concrete has many characteristics that ordinary asphalt concrete does not have, such as small void ratio, water tightness, durability, and excellent fatigue performance. This structure is not easy to appear in ordinary hot-mix asphalt concrete. problems (segregation, etc.). Due to the series of characteristics of cast asphalt concrete, it has been widely used in European countries such as Germany, the United States, Japan and Hong Kong. Poured asphalt concrete is mainly used for bridge deck pav...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the influence of special domestic use conditions (traffic, climate) and the limitation of raw materials (asphalt binder), the fatigue resistance and other properties of poured asphalt concrete have not been comparable to foreign products. The construction fluidity of poured asphalt concrete is the same as concrete The inconsistency between performance remains unresolved

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