Anti-cracking asphalt concrete and preparation method thereof

Abstract

The invention relates to the field of asphalt concrete, and particularly discloses anti-cracking asphalt concrete and a preparation method thereof. The anti-cracking asphalt concrete comprises mineral aggregate, asphalt, fibrilia, super absorbent resin and tetrapod-like zinc oxide whiskers, the weight ratio of the mineral aggregate to the asphalt is 1: (4.18%-5.17%), the weight ratio of the mineral aggregate to the fibrilia is 1: (0.45%-0.6%), the weight ratio of the mineral aggregate to the super absorbent resin is 1: (0.28%-0.42%), and the weight part ratio of the mineral aggregate to the tetrapod-shaped zinc oxide whiskers is 1: (0.24%-0.38%). The preparation method comprises the following steps: preparing a mixture A from super absorbent resin, tetrapod-like zinc oxide whiskers and fibrilia; drying the mineral aggregate, and mixing with the mixture A to obtain a mixture B; and heating asphalt and mixing with the mixture B, to obtain the asphalt concrete. The anti-cracking asphalt concrete disclosed by the invention has the advantage of reducing the cracking degree of the pavement.

Description

technical field [0001] This application relates to the field of asphalt concrete, more specifically, it relates to a kind of anti-cracking asphalt concrete and its preparation method. Background technique [0002] Asphalt concrete refers to the manual selection of mineral materials with a certain gradation composition, crushed stone or crushed gravel, stone chips or sand, mineral powder, etc., and a certain proportion of road asphalt materials, mixed under strictly controlled conditions The mixture is often used in road construction on expressways. [0003] In the hot summer, under the sunlight at noon, the temperature of the asphalt pavement can reach 65°C-70°C. At this temperature, the asphalt surface becomes soft, which is easy to cause cracking of the pavement. At the same time, there is a lot of rain in summer. As the rain continues to enter the pavement structure from the cracks and accumulate in the pavement structure, the water content in the pavement structure grad...

AI Technical Summary

Problems solved by technology

At the same time, there is also a lot of rain in summer. As the rain continues to enter the pavement structure from the cracks and accumulate in the pavement structure, the water content in the pavement structure gradually increases, resulting in the softening of the roadbed and the decline in the bearing capacity of the pavement structure. The degree of cracking of the road surface is increased

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