Marshall design method for evotherm warm mix asphalt mixture

Abstract

The invention relates to a Marshall design method of an Evotherm warm-mix asphalt mixture, comprising the following steps: (1) selecting a Marshall design method of a warm-mix asphalt mixture to design the graduation and oil-stone ratio of the warm-mix mixture; (2) selecting aggregates with different temperatures, conducting a rutting test on the selected aggregates with different temperatures and an asphalt with same temperature of the warm-mix asphalt, and determining the discharge temperature and compaction temperature of the warm-mix asphalt with the bulk density of a test piece of the warm-mix asphalt as a standard; and (3) conducting a high temperature test, a low temperature test, and a water stability test of the warm-mix asphalt at the temperatures, and evaluating by taking technical indexes of the warm-mix asphalt of the same type. According to the invention, the warm-mix asphalt mixture can be designed without a gyratory compactor, the bulk density of the warm-mix asphalt mixture is represented as the core sample density of the rutting plate drilled core, and the technical indexes of the warm-mix asphalt of the same type are taken as the performance index for evaluation; and the design method is simple and reasonable and is convenient for laboratories and field laboratories without the gyratory compactor, thus the design method of the warm-mix asphalt mixture is expanded.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a Marshall design method of Evotherm warm asphalt mixture. Background technique [0002] The research on warm mix asphalt mixture originated in Europe. By adding additives, while maintaining the excellent road performance and construction quality of hot mix asphalt mixture, it effectively reduces the mixing, construction temperature and mixing temperature of asphalt mixture. It can be lowered to 120°C-150°C, and the paving and rolling temperature can be guaranteed at 100°C-130°C to ensure the construction quality. Because of its superiority in reducing energy consumption and protecting the environment, warm mix asphalt has attracted extensive attention from road workers in various countries. [0003] Evotherm warm mix agent is a new technology newly developed in the United States. Evotherm uses chemical admixtures and asphalt dispersion technology. Its chemical ad...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a Marshall design method of Evotherm warm asphalt mixture, which overcomes the problem that warm asphalt mixture cannot be compacted directly by using the Marshall design method of hot mix asphalt mixture, and uses it as a guide Compaction of warm mix asphalt pavement will be more accurate

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