Synthetic fiber modified pavement asphalt and its preparing process

Abstract

The invention disclosed a kind of asphalt material that is used in paving the highway as well as its preparing method, especially a kind of synthon reshaped asphalt as well as its preparing method which belongs to the high polymer material domain. The ingredient of the asphalt includes 30-98.95wt% of synthon, 0.5-60wt% of way asphalt, 0.05-3wt% anti-oxidant and 0.5-30wt% of filling. After previously mix the materials, charge them into the high speed shearing device, shearing the material at 80-220 DEG C for 3-120min to prepare the product. Because of the high speed shearing device and the add of fillings such as talcum powder, during the melting, shearing, leveling, mixing and dispersing process of the materials, the invention has overcome the problem of tangling of the synthon; because of the antioxidant, the comprehensive qualities of the asphalt concrete has been substantially improved. The preparing procedure is simple, practical, and needs low investment and operating cost which is easier to be extended and universalized.

Description

technical field [0001] The invention relates to a road asphalt material for laying roads and a preparation method thereof, in particular to a synthetic fiber modified road asphalt and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Asphalt pavement occupies a very important position in the pavement structure of highways in our country, and about 90% of expressways use asphalt pavement. The most notable advantage of asphalt as a paving material is that it has good adhesion, but its disadvantages are that it is easy to deform and flow at high temperature, easy to crack at low temperature and low tensile strength. With the development of the synthetic fiber industry, research in recent years has found that adding synthetic fiber materials to asphalt can improve its thermal stability, low temperature crack resistance, durability and tensile strength. However, since synthetic fiber materia...

AI Technical Summary

Problems solved by technology

Although the stirring speed of an ordinary stirred tank is as high as 800 rpm, the shear rate is very low due to its large shear range; and due to the high stirring speed, the fiber material is easy to climb around the shaft and the fiber wrapping phenomenon occurs easily. The disadvantages of low dispersion efficiency and poor dispersion uniformity

At present, there are also wind suction and blowing technologies in China to add fibers. Also, due to the uneven scattering of fibers, it is easy to "ball" and affect the comprehensive effect of modified asphalt.

In addition, in engineering, the fibers are also divided into small packages of 1 to 2 kg and put into the mixer one by one, thereby reducing the probability of fiber agglomeration and ball formation, but because the function of the mixer is limited to simple shearing, shearing The rate is low, and the shear is limited to the tangential direction, and the fiber small packaging method cannot fundamentally solve the problem of the formation of fiber balls