Rubber modified asphalt material for road and its preparing method

Abstract

The rubber modified asphalt material is produced through chemical mdofication with organic grafting material and / or crosslinking composition, the organic grafting material is organic unsaturated olefinic acid or its ester, acid anhydride or their mixture, and crosslinking composition is mixture of sulfurizing agent and sulfurizing assistant. One of the preparation process includes the first reaction of rubber solution and the added organic grafting material, mixing with asphalt and final additional of crosslinking composition; and the other one includes dispersing rubber into asphalt, and the subsequent addition of organic grafting material and crosslinking composition for reaction. The rubber modified asphalt has high performance or rubber consumption and stable dispersion of rubber in asphalt and may be used used in expressway and other important highway.

Description

technical field

[0001] The invention relates to a rubber-modified asphalt material for roads and a preparation method thereof. technical background

[0002] Traffic is an important factor restricting the development of national economy. With the rapid development of our country's national economy, the highway traffic also develops rapidly. In the past, the main material for laying roads in my country was ordinary road asphalt, which has the disadvantages of low-temperature embrittlement, high-temperature flow, poor adaptability to strain values, and poor fatigue resistance. Due to the long-term effect of water and moisture in the air on the road, the asphalt will decompose and lose its adhesion to sand and aggregates, making the service life of the road very short. At present, most foreign highways use modified asphalt as paving material. These modified asphalts have good durability, wear resistance, high temperature non-softening, and low te...