A plant-mixed thermal regeneration method capable of realizing full regeneration of rap

Abstract

A hot mix plant recycling method capable of realizing RAP full-recycling comprises the following steps of (1) grading RAP into fine aggregates with particle sizes of less than 2 mm and coarse aggregates with particle sizes of more than 2 mm; (2) heating the fine aggregates to 160-170 degrees centigrade by using a two-stage heating mode so that the fine aggregates are melted into an emulsion shape,and directly heating the coarse aggregates to 120 degrees centigrade; (3) after screening, storing and metering the heated coarse aggregates, putting the screened, stored and metered coarse aggregates into a mixing main machine together with a filling material; and (4) enabling the fine aggregates, which are heated to 160-170 degrees centigrade, to be produced into foamed asphalt emulsion by using a foaming device, and spraying the foamed asphalt emulsion into the mixing main machine according to grading gradation parameters to be mixed together with the coarse aggregates so as to produce a warm mix full-recycled asphalt mixture with temperature of not exceeding 140 degrees centigrade. The hot mix plant recycling method capable of realizing the RAP full-recycling has the advantages that low temperature mixing can be realized, the coarse aggregates are uneasy to adhere, and the RAP full-recycling is realized.

Description

technical field [0001] The invention relates to the technical field of road engineering materials, and more specifically refers to a plant-mixed thermal regeneration method capable of realizing full regeneration of RAP. Background technique [0002] In recent years, in order to respond to the national requirements of "building a conservation-oriented society" and "developing a circular economy", coupled with the increase in the price of petroleum and stone resources, road departments in various places have taken active actions, with the aim of "sustainable development" , with the goal of developing "green transportation", the recycling and reuse of old road asphalt materials has been re-emphasized and paid attention to. Many scientific research institutions and research institutions have begun to study and promote the recycling technology of old road asphalt materials. Among them, the plant-mixed heat regeneration technology is the most commonly used regeneration method in ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a plant-mixed heat regeneration method that can realize full regeneration of RAP, and its main purpose is to overcome the disadvantages of the existing plant-mixed heat regeneration mixing that the recovery and usage of RAP are relatively low, and the remaining large amount of RAP cannot be reused.

Images