High-elasticity and high-toughness special modified asphalt for high-toughness ultrathin pavement and preparation method of high-elasticity and high-toughness special modified asphalt

Abstract

The invention discloses high-elasticity and high-toughness special modified asphalt for high-toughness ultrathin pavement and a preparation method of the modified asphalt. The modified asphalt comprises 100 parts of matrix asphalt, 2-3 parts of a high-elasticity modifier, 3-5 parts of SEBS, 2-4 parts of SBR, 0.15-0.3 part of a sulfur stabilizer and 5-9 parts of rubber oil. The preparation method comprises the following steps: mixing the matrix asphalt, the high-elastic modifier, the SEBS, the SBR, the sulfur stabilizer and the rubber oil, and shearing and stirring. The prepared modified asphalt is good in low-temperature performance, high in elasticity (good in elasticity recovery, more than 95% in elasticity recovery at 5 DEG C within 3 min, high in low-temperature ductility and more than 50 cm at 5 DEG C), capable of resisting deformation and cracking of the modified asphalt at low temperature and good in crack resistance, the EVA and the tackifying petroleum resin are adopted, the dynamic viscosity of the modified asphalt at 60 DEG C is more than 100000 Pa * s, and the modified asphalt is good in high-temperature performance and high in toughness. The mixture prepared from the additive is excellent in high-temperature performance, good in crack resistance and long in fatigue life.

Description

technical field [0001] The invention belongs to the field of modified asphalt, in particular to a high-elasticity-toughness special modified asphalt for high-toughness and ultra-thin pavement and a preparation method thereof. Background technique [0002] In view of the common drawbacks in the current road maintenance technology, such as strong dependence on the flatness of the original road surface, insufficient durability and low cost performance of materials, the existing materials have poor anti-skid ability, are not suitable for low temperature performance, and the snow melting is relatively low. Slow and other disadvantages. Small particle size asphalt mixture thin layer paving technology has good road performance and universal applicability for production and construction, especially for tunnels (including tunnel entrances and exits), bridge deck paving, airport runways, steep slopes and sharp bends, long longitudinal slopes and Asphalt pavement paving and old cement...

AI Technical Summary

Problems solved by technology

[0002] In view of the disadvantages commonly existing in the current road maintenance technology, such as strong dependence on the flatness of the original road surface, insufficient durability and low cost performance of materials, the existing materials have poor anti-skid ability, are not suitable for low temperature performance, and snow melting is relatively slow. Slow and other disadvantages