Asphalt resin-based cold regenerant and regenerated mixture

Abstract

The invention discloses an asphalt resin-based cold regenerant and a regenerated mixture. The cold regenerant is composed of a resin emulsion, cement, a phase agent having dissolving and mixing effects for waste asphalt and the rubber emulsion, an aggregate surface hydrophobic agent and a curing agent of the resin emulsion. The resin emulsion, the phase agent and the cement are used as main components. Each of the components co-increases cementing property for the aggregate. When the cold regenerant is in use, a binding material is a multi-phase system formed by intertwining dissolved and activated regenerated asphalt, the cured resin emulsion and a cement hydration product. The system is stable and has good binding property, and can overcome the main damage problems of high temperature softening deformation, low temperature brittle rupture and stripping of the binding interface eroded by water, of a single asphalt binding material. The regenerated mixture formed by the cold regenerant can be directly paved by vibration without roll compaction. Application efficiency is relatively high while cost is relatively low. A formed road surface has high strength and small temperature sensitivity, and can resist ageing and water erosion.

Description

technical field [0001] The invention relates to a regeneration agent which is mixed with waste asphalt on the road surface to regenerate it, in particular to an asphalt resin-based cold regeneration agent and a regeneration mixture. Background technique [0002] Asphalt pavement is the most widely used pavement structure in road construction; with the increase of service life, a large part of the pavement has reached the design life and needs to be overhauled or renovated. [0003] Due to the increasing proportion of asphalt pavement, a large amount of asphalt materials and mixtures are required for new construction and renovation; in order to save costs, the regeneration of old asphalt has attracted increasing attention. [0004] In the existing technology, the regeneration of asphalt is divided into hot regeneration, warm regeneration and cold regeneration; in the hot regeneration process, the mixture is made of old asphalt materials, new mineral materials, regeneration ag...

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Problems solved by technology

[0004] In the existing technology, the regeneration of asphalt is divided into hot regeneration, warm regeneration and cold regeneration; in the hot regeneration process, the mixture is made of old asphalt materials, new mineral materials, regeneration agent and new asphalt, and the greater the amount of old materials , the higher the heating temperature of the old material, the obvious thermal aging of the old material, which will have a very bad effect on the road surface in the later stage. Therefore, the amount of old material is limited

[0005] In order to expand the utilization rate of old materials, the warm regeneration technology that integrates warm mixing technology and factory mixing hot regeneration technology has been developed. The temperature of recycled asphalt is 30°C-50°C lower than that of thermal regeneration, which reduces the aging of recycled asphalt; however, at this temperature, the old asphalt will still aggravate the aging of a large part, which will affect the quality of the road surface in the later stage; in applications, it is more used for pavement non-surface layer

[0006] In order to solve the above problems, a cold recycling process has emerged. The more commonly used method is to use foamed asphalt cold regeneration agent (requires heating) or emulsified asphalt cold regeneration agent (less asphalt consumption) to mix recycled asphalt pavement materials and reuse them. Under a certain pressure, a pavement structure layer with certain road performance is formed; since the foamed asphalt and emulsified asphalt are both formed by new asphalt, they are used after mixing with old materials, stirring and bonding; because the properties of old asphalt have not changed, The pavement structure is only formed after bonding, and the strength is low, and it can only be used for other auxiliary layers other than the surface layer in the final application

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