Bituminous mixture cold regeneration mixing method

Abstract

The invention belongs to the production technology of a road engineering material, and relates to a cold-regeneration mixing method of asphalt mixture in the cold-regeneration equipment of asphalt mixture. The method comprises the following steps: the mixing process is carried out in a continuous mode mixing bowl and the addition of the various materials comprises the following steps: (1) adding aggregate at the feed inlet of of the initial end of the continuous type mixing bowl and carrying out spraying process to the aggregate simultaneously, then mixing in the mixing bowl, the amount of the spray water accounts for 20-30% of the total water amount; (2) adding cement and powdered ore into the mixing bowl to be mixed with the previously-added materials; (3) adding water for the second time and the amount of the water accounts for 50-60% of the total water amount; (4) spraying emulsified asphalt and mixing continuously; and (5) adding water for the third time and the amount of the water accounts for 10-20% of the total water amount until the asphalt mixture is obtained. The invention not only improves the uniformity of the mixing of the materials, but also fully utilizes the reaction characteristics between various materials, and guarantees the mixing quality of the final product.

Description

technical field [0001] The invention belongs to the preparation technology of pavement engineering materials, and relates to an asphalt mixture cold regeneration mixing method for mixing and regenerating the mixture in asphalt mixture cold regeneration equipment. Background technique [0002] Usually, the production method of asphalt mixture is to put the cold aggregate into the mixing tank together with the heated asphalt and powder after heating, and then stir to produce asphalt mixture with a certain temperature and a certain gradation. The production method of asphalt mixture produced in asphalt mixture cold recycling mixing equipment is different. Aggregate and asphalt do not need to be heated. It mixes aggregate, powder, water and emulsified asphalt according to the required ratio. And the asphalt mixture that can be used for asphalt pavement base paving can be obtained directly. In the existing asphalt mixture cold regeneration mixing process, various raw materials a...

AI Technical Summary

Problems solved by technology

In the existing asphalt mixture cold regeneration mixing process, various raw materials are usually put into the mix once and then mixed. It is usually difficult to obtain better uniformity of the produced asphalt mixture, and it is difficult to achieve the optimal state of mixing and reaction of various materials. Thus affecting the final quality of the asphalt mixture