Crumb rubber modified asphalt and prepration method thereof

Abstract

The invention discloses a crumb rubber modified asphalt and a prepration method thereof, which aim at the deficiencies that the crumb rubber powder modified asphalt prepared by the prior art has low stability (appearing stratification phenomenon in storage) and special requirements on the fineness of crumb rubber powder. The proportioning by portions by weight of raw materials is as follows: 20-25 portions of waste rubber powder, 8-12 portions of polystyrene particles, 75-80 portions of based asphalt, 0.2-0.5 portion of high-efficient active reactant and 0.5-0.7 portion of stabilizer. The preparation method is as follows: the crumb rubber powder, the polystyrene particles, the based asphalt, the high-efficient active reactant and the stabilizer with the certain proportioning are added in the based asphalt at 180-190 DEG C and treated by special devices such as stirring, strong shearing and the like, thereby preparing an asphalt product with stable performance, no separation, convenient construction, good high-temperature and low-temperature performances, good anti-stripping performance, no excessive requirements on the fineness of the crumb rubber powder (only 20-40 meshes), good stability and ability of being applicable to large-scale factory production.

Description

Technical field [0001] The invention relates to a modified asphalt and a preparation method thereof, in particular to a waste rubber modified asphalt with good stability and excellent road performance and a preparation method thereof. Background technique [0002] With the rapid development of transportation and modern automobile industry, a large number of waste rubber tires have appeared. Used tires are industrial hazardous solid wastes, which can deteriorate the natural environment, destroy vegetation growth, affect human health and living environment, and endanger the earth's ecological environment. . my country is the third largest tire producer and consumer in the world. In 2007, my country produced 120 million waste tires, and this trend is increasing year by year. In the suburbs of large and medium-sized cities, we often see piles of waste tires like hills. The "black pollution" formed by more and more waste tires is threatening our country's ecological environment. [00...

AI Technical Summary

Problems solved by technology

[0011] For the waste rubber powder modified asphalt prepared by the existing technology, the stability is not high (stratification occurs in storage), and there are special requirements for the fineness of the waste rubber powder. After extensive and in-depth research, the inventor proposes different The application date is October 24, 2003, the patent number is ZL200310104905.5, the announcement number is CN1313566C, the invention name is a waste rubber powder modified asphalt and its preparation method and the application date is October 29, 2004 Japan, the patent number is ZL200410050792.X, the announcement number is CN100340610C, the invention name is a kind of waste rubber powder modified asphalt composition and its preparation method invention patent, a waste rubber modified asphalt and its preparation method, the prepared The quality of waste rubber powder modified asphalt is stable without separation during storage and transportation, and the construction is convenient. item only)

Images