A kind of asphalt pavement reinforcement material

Abstract

The invention discloses a bituminous pavement reinforcing material. The bituminous pavement reinforcing material is prepared from the following raw material components in percentage by weight: 40-60% of cotton stalk cellulose, 20-45% of basalt fiber, 5-10% of polyester fiber, 3-5% of polyethylene and 1-2% of carbon black. The bituminous pavement reinforcing material has the advantages that strength of a pavement can be improved, the pavement can be prevented from cracking at a low temperature, and temperature shrinkage cracks are reduced; at a high temperature, partial bitumen expanded after being heated is absorbed, so that oil bleeding and high temperature loss of the bitumen, which are caused under a high temperature, are prevented; high temperature stability is improved, and the service life of the pavement is prolonged; pavement oil spot caused by formation of a micelle-shaped substance is prevented; leak and isolation of the bitumen are prevented; raw materials are available, a preparation process is simple, and cost for laying a bituminous pavement is greatly reduced.

Description

technical field [0001] The invention relates to an additive for improving the performance of asphalt pavement, in particular to a reinforcing material for asphalt pavement. Background technique [0002] Existing asphalt pavement has problems such as high-temperature softening, oil flooding and low-temperature embrittlement, which affect driving safety and the service life of the road. Especially in Xinjiang, the winter is cold and rainy, the summer is hot, the air is dry, and there is more rain at the end of autumn, and the temperature difference between day and night can reach more than 30 degrees. Tensile stress occurs at the semi-rigid subgrade base, and the pavement layer is easily cracked. As the temperature rises and falls repeatedly, the internal stress of the asphalt surface layer changes repeatedly, forming a stress fatigue phenomenon. In addition, the ultraviolet rays in Xinjiang are relatively strong, which makes the asphalt pavement prone to fatigue cracks. In o...

AI Technical Summary

Problems solved by technology

However, lignin fiber is a fibrous material prepared from wood. The source of raw material is limited and the price is high, which limits its application in pavement engineering.

Chemical fibers are also expensive and the production process is complicated

Whether it is chemical fiber or wood fiber, it enhances the crack resistance and waterproof performance of asphalt pavement to a certain extent, but it is added in a large amount in asphalt and it is difficult to achieve the purpose of both strengthening and toughening. The overall performance is not good, and the cost is relatively low. higher

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