In-situ warm-mixing regenerant for bituminous pavement, preparation method and construction method of in-situ warm-mixing regenerant

Abstract

The invention relates to an in-situ warm-mixing regenerant for a bituminous pavement, and a preparation method and a construction method of the in-situ warm-mixing regenerant. The strength of a cold-regenerating mixture is longer in formation time; a finish coat in a certain thickness is required to be paved additionally; the property of the regenerated mixture is poorer; a lower level cold mixing technology is used generally; and cement is required to be added generally, so that the durability of the level is reduced. The in-situ warm-mixing regenerant for the bituminous pavement comprises the following raw materials in parts by mass: 10-30 parts of naphthenic hydrocarbon, 20-40 parts of furfural extract oil, 30-50 parts of deionized water, 10-20 parts of microwave absorption agent, 5-10 parts of surfactant, 5-10 parts of dispersing agent and 1-5 parts of antiaging agent. According to the in-situ warm-mixing regenerant, the preparation method and the construction method, the mixing cost can be lowered; the construction efficiency is improved; a use ratio of old materials is increased; compared with in-situ heat regeneration, the ageing of a bituminous mixture is reduced; the service life of the pavement is prolonged; a cooling rate is reduced; the discharge amount of harmful gas and dust is decreased; new aggregates and new bitumen are not required to be added; and the material cost is lowered.

Description

technical field [0001] The invention relates to the technical field of on-site regeneration of asphalt pavement, in particular to an in-situ warm-mix regeneration agent for asphalt pavement, its preparation method and its construction method. Background technique [0002] At present, in-situ regeneration technology of asphalt pavement can be divided into hot-in-place regeneration technology and cold-in-place regeneration technology. Hot-in-place regeneration refers to heating and softening the original asphalt pavement, loosening (planing) the old pavement mechanically, stirring it (asphalt, regeneration agent, new mixture or new aggregate can be added as needed), and Re-paving and compacting the formed recycled mixture on the spot, so as to achieve the road maintenance process of eliminating road surface diseases and restoring road surface performance. The hot-in-place recycling technology is mainly used to restore the bonding properties of aged asphalt, and regenerate the...

AI Technical Summary

Problems solved by technology

The main disadvantages of hot-in-place regeneration are: ①The heating temperature of the aggregate is too high (about 180°C) during thermal regeneration and remixing. After mixing with RAP material (old material for asphalt pavement milling), it is easy to make the The asphalt is aging again, which affects the service life of the mixture; ②The heat regeneration requires a high heating temperature (about 180°C), which increases the energy consumption and aggravates the damage to the environment; ③Adds new aggregates and new asphalt

The main disadvantages of in-situ cold regeneration are: ①The strength of the cold recycled mixture takes a long time to form; ②It needs to be covered with a certain thickness of overlay; ③The performance of the recycled mixture is poor, and the layers generally used are low; ④Cold mixing technology generally needs to add cement, so that the durability of this layer is reduced