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Embedded pouring asphalt concrete

An asphalt concrete, pouring technology, which is applied to the coagulation pavement, buildings, roads and other directions of on-site paving, can solve the problems that the performance of the construction fluid concrete cannot be solved, and the anti-fatigue performance of the pouring asphalt concrete cannot be solved. High promotion and application value, the effect of ensuring the embedding rate and reducing the mixing temperature

Active Publication Date: 2010-06-16
重庆市智翔铺道技术工程有限公司
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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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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Reduce the amount of coarse aggregate (≥2.36mm) basalt by adopting the gradation requirement range of poured asphalt concrete (GA10) in the "Technical Guidelines for Design and Construction of Highway Steel Box Girder Bridge Deck Pavement" (Jiaogong Editor [2006] No. 274) 28%, put it into the asphalt mixture mixing building to mix and mix well. The mixing temperature is 203°C. After paving and leveling with a paver, a cast-type asphalt concrete 1 with a reduced amount of coarse aggregate is formed, and spread on its surface A layer of basalt gravel with a particle size of 10-15mm is used in an amount of 22% of the mass of the designed poured asphalt concrete to form the first layer of coarse aggregate 2, and then a second layer of basalt gravel with a particle size of 5-10mm is spread on the surface. The amount used is 14% of the mass of the designed pouring asp...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32E01C19/00
Inventor 王民张华薛昕伍朝晖盛兴跃郝增恒张锋
Owner 重庆市智翔铺道技术工程有限公司
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