A kind of composite asphalt cold patch material and its preparation method

Abstract

The invention discloses a composite asphalt cold pairing material and a preparation method. The formula of the composite asphalt cold pairing material comprises the following components in percentage by weight: 3-6% of a macromolecular asphalt cold repairing liquid, 92-97% of aggregate and 0-2% of an additive. The preparation method comprises the following steps: reasonably matching the macromolecular asphalt cold repairing liquid, the aggregate and the additive, adding the aggregate and the additive into a compulsive stirring machine in sequence at normal temperature, stirring for 5-15 seconds by using the stirring machine, and adding the macromolecular asphalt cold repairing liquid and continuously stirring for 30-60 seconds, thereby obtaining a composite asphalt cold repairing liquid product. The composite asphalt cold pairing material is simple in preparation process, low in equipment requirement, low in use cost and applicable to emergent repairing of pavement pits and grooves, and has the characteristics of being good in adhesion property and water stripping resistance, high in molding strength and the like, and the service life of the composite asphalt cold pairing material is as long as 1 year.

Description

technical field [0001] The invention relates to the field of emergency repair materials for asphalt pavement potholes, in particular to a composite asphalt cold patch which can be used in various weathers and has a long service life and a preparation method thereof, which belongs to the related field of asphalt pavement maintenance and repair. Background technique [0002] Asphalt pavement is dominated by the advantages of flat surface, comfortable driving, good vibration reduction, low noise, and recyclable utilization of old asphalt mixture. During use, under the action of various natural factors (such as oxygen, ultraviolet rays, temperature, water, etc.) and human factors (such as construction, heavy load, etc.), the pavement will inevitably experience reduced road performance and even pits. Structural damage such as holes and potholes. If effective maintenance measures are not taken to eliminate diseases in time, it will not only affect the life of the subgrade, but al...

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Problems solved by technology

The first method is to use the factory mixing method to supply materials, and pave the construction on site. This method has strict requirements on the site, construction conditions and compaction technology, otherwise it is very easy to be damaged again; the second method is to use thermal regeneration on site. Milling old materials by car, adding asphalt and new materials on site for remixing to form hot-mix recycled mixture for paving and compaction, this method has high requirements for equipment and compaction process, otherwise it is very easy to cause poor mixing of the mixture The repair quality is not good due to uniformity and inaccurate rolling; the third method is to mix the emulsified asphalt and aggregates on site through a small mixer, and then pave and compact the emulsified asphalt. The main problem is that the emulsified asphalt needs to be broken before it can be opened Traffic, poor timeliness, and on-site mixing has relatively high requirements for emulsified asphalt and mixing technology, and quality problems are prone to occur

The common disadvantages of these three methods are: the requirements on ambient temperature and construction conditions are relatively strict, such as rainy and snowy weather, small sites, etc. are not suitable for construction; materials need to be used once, otherwise they will be discarded

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