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 are more stringent , the basic requirement is greater than 190 degrees, and at the same time the viscosity is high, and the construction workability is poor; (3) Environmental pollution: when the rubber asphalt of general technology is constructed, the smell is very strong, and the construction workers need to be protected, which seriously hinders the promotion of rubber asphalt; (4) Early rubber powder can only be directly mixed into asphalt for production (wet method), or can only be mixed with rubber powder into asphalt mixture (dry method), and it has not been possible to produce rubber powder that can be used for The high-quality asphalt mixture (5) of the two production methods is limited in use time: after the early rubber asphalt technology is produced, it must be used for more than 24 hours, otherwise it will dissolve and greatly reduce the viscosity, or it will be precipitated and cannot be used, and it cannot be stored in tanks must be directly connected to the mixing plant

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