Foamed asphalt cold-regenerating structural layer mixture and construction method thereof

Abstract

The invention discloses a foamed asphalt cold-regenerating structural layer mixture. The foamed asphalt cold-regenerating structural layer mixture is prepared from the following materials of a mineral aggregate, cement, an anti-stripping agent, mixing water, foamed asphalt and fiber. The mineral aggregate is composed of the following materials of, by mass, 30-40 parts of a milling-planing old material with the grain diameter being 10-30 mm, 35-45 parts of a milling-planing old material with the grain diameter being smaller than 10 mm, 2-8 parts of new aggregated rock with the grain diameter being 10-30 mm, 10-20 parts of new aggregated rock with the grain diameter being smaller than 10 mm and 4-6 parts of pulverized fuel ash. The dosage of the cement is 1.5-2.5% of the total dosage of the mineral aggregate, the mixing amount of the anti-stripping agent is 0.4-0.6% of the total dosage of the mineral aggregate, and the dosage of the mixing water is 4-5% of the total dosage of the mineral aggregate, the dosage of the foamed asphalt is 2.5-3.5% of the total dosage of the mineral aggregate, and the total mixing amount of the fiber is 0.35-0.45% of the total dosage of the mineral aggregate. The invention further discloses a construction method of the mixture. After construction of the foamed asphalt cold-regenerating structural layer mixture is conducted, a road can has good water stability and anti-rutting performance; and the road maintenance or transformation cost is reduced, the construction period is shortened, and the time of traffic stop is reduced.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a foamed asphalt cold recycled structural layer mixture and a construction method thereof. Background technique [0002] With the rapid development of the national economy, the traffic volume is increasing rapidly, the channelized traffic is obvious, and the proportion of large-scale vehicles, heavy-duty vehicles, and overloaded vehicles is increasing year by year, which poses serious challenges to the traditional asphalt concrete pavement. After decades of domestic and foreign expressway construction practice, especially in China, the asphalt pavement generally has two major problems: insufficient durability and early damage. Pavement damage is of various types and forms. Generally speaking, the pavement damage of high-grade highways includes rutting, cracking fatigue cracking, low temperature cracking and reflection cracking, subsidence, potholes, slurry and other dam...

AI Technical Summary

Problems solved by technology

After decades of construction practice at home and abroad, especially in China for more than ten years, the asphalt pavement generally has two major problems: insufficient durability and early damage.