Composite seal coat for pavement maintenance

A technology of material layer and sand material, which is applied in the field of composite sealing layer for pavement maintenance, can solve the problems of easy loosening and peeling of stone materials, threats to driving safety, poor adhesion, etc., and achieve good spreading effect, long-term anti-skid ability, and adhesion Lego effect

CN102444067AInactive Publication Date: 2012-05-09SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2012-05-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a composite seal coat for pavement maintenance. The composite seal coat contains two layers which are a sand aggregate layer and an emulsified bitumen material layer. The original pavement is a carrier of the composite seal coat. The emulsified bitumen material layer is used for sealing micro-cracks on the surface of the pavement, resisting to water, recovering aged pavement and preventing the pavement from being loosened. The sand aggregate layer, which covers the emulsified bitumen material layer, is made from a specially-produced sand aggregate and is used for The composite seal coat provided by the invention is used to optimize inherent defects of a fog seal coat and extend engineering application range, can serve as a means for the preventive maintenance of expressway pavement, and has advantages of simple technology, energy conservation and environmental protection.
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Description

technical field

[0001] The invention relates to the fields of engineering and materials, in particular to a composite sealing layer for road surface maintenance. Background technique

[0002] Fog seal layer AEMA (Asphalt Emulsion Manufacturers Association) technology is used for road surface preventive maintenance, spraying a thin layer of diluted emulsified asphalt on the road surface to reduce loosening and improve surface drying and weathering. New asphalt acts on aging surfaces to extend pavement life. In addition, the fog seal layer can seal small cracks and potholes, prevent water from entering the surface pores, and improve the waterproof function of the road surface. The fog layer seal has the following characteristics: After construction, it needs to be aired and dried before it can be opened to traffic; the amount of spraying per unit area must be strictly controlled. Too thick or too much spraying amount will form a layer of smooth asphalt film on the road surfac...

Examples

Embodiment Construction

[0028] Below in conjunction with accompanying drawing, the present invention will be further introduced. The emulsified asphalt material used in the present invention is NDAP (Non-reachable Fog Seal), which is a cationic polymer modified asphalt coating. The evaporation residue content of the modified emulsified asphalt material is greater than 55%, and the standard viscosity of asphalt is 15-40. The extension is greater than 40cm.

[0029] Before the construction of the sealing layer, the original pavement surface needs to be cleaned to remove road debris.

[0030] For sealing layer construction, use asphalt sprayer to spray emulsified asphalt material. The spraying amount is controlled in the range of 0.4-0.7L / ㎡. The optimal amount is determined according to the actual road surface structure depth. Generally, the original road surface structure depth is about 0.9mm and 0.5L / ㎡ is selected. amount of asphalt.

[0031] During the construction of the sealing layer, the sprayin...