Rubber modifier, preparation method of rubber modifier, rubber asphalt mixture and rubber asphalt

Abstract

The invention relates to a rubber modifier and an application method thereof. The rubber modifier comprises the following components by mass percent: 70-90% of rubber powder, 5-30% of softener, 0-30% of plastic polymer materials and 0-10% of active agent. The rubber modifier works together with no less than 70% of rubber powder to consume a large quantity of waste rubber; since the softener is added to the rubber powder, rubber material becomes soft and the rubber powder and/or plastic polymer materials can be better swelled and dispersed into the asphalt mixture or asphalt; the rubber powder, the softener and/or the plastic polymer materials, and the active agent generate synergistic effects; the rubber modifier disclosed by the invention has excellent ageing resistance and low viscous flow temperature, can be used for preparing the rubber asphalt mixture by a dry method and also can be used for preparing the rubber asphalt by a wet method; the heating temperature of the asphalt and the asphalt mixture can be reduced. Thus, high-temperature aging of the asphalt is prevented and energy consumption and carbon emission are greatly reduced. The product disclosed by the invention is easy to store; the blending. Transportation and storage costs are effectively saved and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a rubber modifier and a preparation method thereof, rubber asphalt mixture and rubber asphalt. Background technique [0002] At present, my country's annual average rubber consumption accounts for 30% of the world's total rubber consumption, and has become a major consumer of rubber resources. Tires are the most important rubber products in my country. In 2009, my country's production of tires consumed rubber that accounted for the total consumption of rubber resources in the country. About 70% of the waste tires produced annually are about 233 million, with a weight of about 8.6 million tons, equivalent to about 3 million tons of rubber resources. If it can be fully recycled and reused, it is equivalent to the natural rubber output of my country for 5 years. [0003] The total stock of waste tires in my country ranks second in the world. Obviously, the amount of waste tires pro...

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Problems solved by technology

[0004] Since the first British patented rubber asphalt was used in 1843, people have been committed to the research, industrialization and promotion of the technology and application of rubber recycled from waste tires in road asphalt pavement construction, which can significantly improve the asphalt mixture. The temperature-sensitive performance of the material can reduce the environmental noise generated by driving, prolong the service life of the asphalt pavement, and improve the service functionality of the asphalt pavement; however, there are still the following disadvantages: (1) Early rubber asphalt products require special rubber asphalt modification equipment. Production, not suitable for small-scale engineering construction, and the amount of rubber added is limited, so the amount of waste rubber to be processed is limited; (2) The early rubber asphalt technology construction is more difficult: when rubber asphalt and its mixture are constructed, the temperature requirements

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