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Pavement Layer Structure and Recycling Method of Old Pavement Materials
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A layer structure and surface layer technology, which is applied in the field of pavement layer structure and pavement old material recycling, can solve the problems of difficult construction and achieve the effects of improving construction efficiency, increasing the amount of mixing, and increasing the effective area
Active Publication Date: 2020-03-27
南通城宇材料科技有限公司
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[0004] Compared with the asphalt pavement hot-mix recycling technology, this in-situ thermal regeneration technology of asphalt pavement saves material transportation costs, but its regeneration depth is only 20-50mm due to the limitation of geothermal equipment, and the construction is difficult, and there is still room for improvement
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Embodiment 1
[0053] A pavement layer structure, refer to figure 1 as well as figure 2 , Including cushion 2, base 3 and surface 7, cushion 2 is provided with diversion grooves 211 extending obliquely downward along the length of the road and communicating with the outside, base 3 is equipped with reinforced mesh 31, reinforced mesh 31 facing the road surface The edge of the side is connected with a first heat conducting member 313 communicating with the outside, and the steel mesh 31 is also provided with a second heat conducting member 315 extending to the surface layer 7.
[0054] Reference figure 2 The cushion layer 2 is a concrete layer laid on the soil base layer 1. The cushion layer 2 includes a bottom layer 21 parallel to the soil base layer 1, and a subgrade 22 perpendicular to the bottom layer 21 and located on both sides of the road along the length direction. The subgrade 22 is along the vertical direction Extend to the top of the road.
[0055] The diversion groove 211 is located ...
Embodiment 2
[0061] A method for recycling old road materials used in the pavement layer structure in Example 1, refer to image 3 , Including the following specific steps:
[0062] S001 steel mesh heating, as follows:
[0063] Insert the heating device into the socket to generate heat, and then conduct the heat to the steel mesh through the vertical steel bars. The steel mesh heats up the asphalt in the base layer to heat up and melt, and the steel bars conduct the heat of the steel mesh into the surface layer to make the first The asphalt in the surface layer, the second surface layer, and the third surface layer heats up to melt.
[0064] Since the top of the steel bar is also connected with a thermal conductive strip located in the third surface layer, the thermal conductive strip increases the heat transfer area and accelerates the melting of the road asphalt.
[0065] In this embodiment, the heating device is a heating device commonly used in the art, specifically a heating rod, the outer d...
Embodiment 3
[0099] The difference from Embodiment 2 is:
[0100] In S003 new and old asphalt mixture, the weight fraction of old asphalt is 35% of the recycled mixture.
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Abstract
The invention relates to the technical field of highway maintenance and provides a pavement layer structure and a pavement old material recycling method for the problem of the large construction difficulty. The pavement layer structure is characterized in that the pavement layer structure comprises a cushion layer, a base layer and a face layer; the cushion layer is provided with a flow guiding groove communicating with the outside, and the base layer is provided with a reinforcement fabric; and the reinforcement fabric is connected with a first thermal conduction piece communicating with theoutside and a second thermal conduction piece extending to the face layer. The pavement old material recycling method comprises the steps of reinforcement fabric heating, asphalt collecting, new and old asphalt mixing, thermal conduction strip dismantling, base layer laying and compacting, first surface layer laying and compacting, second surface layer laying and compacting, thermal conduction strip mounting, and third surface layer laying and compacting. The reinforcement fabric is heated to enable pavement asphalt to be molten so as to be recovered, limitation on the regeneration depth due to limitation of geothermal equipment is reduced, meanwhile only the first thermal conduction piece needs to be heated, and thus the construction difficulty is greatly reduced.
Description
Technical field [0001] The invention relates to the technical field of road maintenance, more specifically, it relates to a pavement layer structure and a method for recycling old road materials. Background technique [0002] In the process of highway maintenance, there will be many damaged pavements. If the pavement is re-paved, the cost will be very high. Choosing the method of road regeneration can reduce the cost of re-paving the road. Regarding the road surface recycling technology, a large amount of asphalt pavement materials are mainly produced through the overhaul and reconstruction of the asphalt pavement, and then this part of the asphalt pavement materials are recycled. [0003] Asphalt pavement hot-in-place recycling technology uses special hot-in-place recycling equipment to heat and soften the asphalt pavement, then harrow it to a certain depth, and mix in a certain amount of new asphalt, regenerating agent, new asphalt mixture, etc. to form a new Hot mix recycled a...
Claims
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