Microcrystalline wax-modified cold patch asphalt mixture and preparation method thereof

Abstract

The invention relates to a patch material for an asphalt pavement and a preparation method thereof. A microcrystalline wax-modified cold patch asphalt mixture is characterized by being prepared from aggregate, filler, asphalt, a diluting agent and microcrystalline wax in the mass ratio of 100:(1-10):(3-6):(0.5-2):(0.02-0.15). The preparation process is simple and low in cost; and the prepared cold patch asphalt mixture has the characteristics of high strength and long service life. The cold patch asphalt mixture is especially suitable for patching road pit slots and has the advantages of convenience and quickness in construction, no closing for traffic, no pollution to the environment and no limit from weather conditions.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement repair materials, and in particular relates to a repair material for asphalt pavement and a preparation method thereof. Background technique [0002] At present, the asphalt repair materials used in road construction are mainly hot mix asphalt mixture, followed by emulsified asphalt mixture and cold patch asphalt mixture. There are three production methods of hot-mix asphalt mixture: the first one is to use the mixer to produce the finished mixture in the asphalt mixing plant, and transport it to the maintenance site for construction; the second is to use a small mobile mixer in the maintenance site Or the comprehensive maintenance vehicle produces the finished asphalt mixture for construction; the third is when the demand is small, heat the asphalt mixture in the maintenance site and mix the asphalt mixture for construction. The common disadvantages of these three methods are: the produ...

AI Technical Summary

Problems solved by technology

The common disadvantages of these three methods are: the production, transportation and construction of hot patched asphalt mixture require high temperature, which is greatly affected by the construction season, and the asphalt mixture is not easy to compact when the temperature is low; at the same time, it will pollute the environment, Affects the physical and mental health of construction workers; requires a longer closure to traffic throughout the repair process

Disclosed in CN100386386C is a kind of with SBS, petroleum resin, terpene resin, the road surface cold-patch asphalt additive material that terpene resin, mineral oil prepare; In CN1152591A, disclose the method for diluting asphalt with solvent oil and vegetable oil to produce low-temperature asphalt mixture, so The operating stability of the prepared asphalt mixture is 1.89-2.83kN, the initial stability is 2.6-6.1kN, and the service stability is 3.4-5.3kN; patent CN1640939A discloses a kind of diesel oil, gasoline, ethylene glycol, SBS and aging agent. The cold-mixed SBS asphalt liquid repair material, the Marshall stability of the mixture prepared with this asphalt liquid is> 4.0kN, and the area of ​​the asphalt-coated stone material tested by the water boiling method is> 2 / 3; Heavy oil, petroleum resin, solvent oil, styrene-butadiene rubber, diesel oil, kerosene or gasoline, naphthenic oil and mineral oil have been mixed with asphalt to prepare the cold patch asphalt binder, but the preparation process of this method is more complicated, and the prepolymer needs to be prepared first A, B and C, and then these three are mixed with the aggregate to obtain the cold patch, the initial stability of the cold patch is measured by the Marshall test> 2.5kN, and the molding stability> 5.0kN; a method is disclosed in CN1554708A A cold-patch asphalt material composed of petroleum asphalt, polyurethane, resin, antifreeze, diluent and coagulant, the initial stability of the cold-patch asphalt mixture is ≥2.5kN, the molding stability is ≥5.0kN, boiled The area of ​​asphalt-coated stones tested by the method is> 80%; the patent CN1198879C provides a kind of cold construction asphalt mixture prepared with diesel oil, kerosene, gasoline and naphthenic acid mixed release agent and asphalt, aggregates, The stability of the mixture is 1.5kN when the Marshall test piece is formed at 0°C

Looking at all kinds of existing cold-patch asphalt materials, most of them have complicated preparation process, so the cost is high, and because the strength is not high enough, the water peeling resistance and cohesion are not enough, so the water resistance is not good, and the patch is prone to loosening , cracks, pits and other damage, the final service life is short, especially in high temperature environments, the performance is even worse

Images