In-situ cold recycled foamed asphalt mixture and cold recycled pavement construction method

Abstract

The invention discloses an in-situ cold recycled foamed asphalt mixture which comprises mineral aggregate, cement, foamed asphalt, fibers and mixing water, and the mineral aggregate comprises the following components in parts by weight: 30-40 parts of old pavement milling material with the particle size of less than 5mm, 20-25 parts of old pavement milling material with the particle size of 5mm-32mm, 10-15 parts of new stone with the particle size of less than 5mm and 6-10 parts of new stone with the particle size of 5mm-32mm; the using amount of the cement accounts for 23% of the mass of themineral aggregate, the using amount of the foamed asphalt accounts for 3-4% of the mass of the mineral aggregate, the using amount of the fibers accounts for 0.4-0.5% of the mass of the mineral aggregate, and the using amount of the mixing water accounts for 6-8% of the mass of the mineral aggregate; a pavement construction method using the foamed asphalt mixture in the scheme comprises the following steps: burdening, paving, rolling and curing. Compared with the prior art, the foamed asphalt mixture and the pavement construction method have the advantages that the constructed pavement is smooth, pavement surface layer diseases such as ruts, cracks, pits and pitted surfaces can be effectively eliminated, the gradation of an original pavement mixture can be improved, the road usability is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of road surface construction, in particular to an in-situ cold recycled foam asphalt mixture and a cold recycled road surface construction method. Background technique [0002] In-situ cold recycling refers to the road construction technology that uses asphalt recycling equipment to crush old asphalt pavement materials on the spot, add new aggregates, mix and compact them, and use old pavement materials as the main material. The cold-in-place recycled mixture refers to a mixture including old road milling materials and new aggregates, and the cold-in-place recycled mixture of foamed asphalt refers to a cold-in-place recycled mixture including foamed asphalt. [0003] According to the design life of asphalt pavement (15 to 20 years), many roads that have been built in my country will gradually enter the stage of repair and maintenance. If traditional methods are used, a large amount of waste asphalt mixture t...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the defects in the prior art that the quality of the finished foamed asphalt cold recycled mixture is not very high, the amount of material used is large, and the effect of road construction is poor, and to provide an in-situ cold recycled foamed asphalt mixture and Cold recycled pavement construction method to solve the above problems