Basalt fiber asphalt preparation and performance evaluation method for simulating actual mixing process

Abstract

The invention discloses a basalt fiber asphalt preparation and performance evaluation method for simulating an actual mixing process. The method comprises the following steps: selecting coarse aggregate with the particle size range of 16-26.5 mm, cleaning, drying, heating for 4-5 hours in a drying oven with the temperature of 162-178 DEG C, and carrying out dry mixing on the coarse aggregate and bunchy basalt fibers for 85-95 seconds; and taking out the dry-mixed and scattered basalt fibers, weighing a certain mass of basalt fibers, adding the basalt fibers into asphalt with the temperature of 162-178 DEG C in batches, and fully stirring at a high speed by using an electric stirrer to obtain the basalt fiber asphalt. The basalt fiber asphalt is subjected to a temperature scanning test through a dynamic shear rheometer, and complex moduli, phase angles and rut factors corresponding to the basalt fiber asphalt at different temperatures are obtained to evaluate the high-temperature deformation resistance of the basalt fiber asphalt. The basalt fiber and the aggregate are subjected to pre-dry-mixing, the actual mixing process of the basalt fiber and asphalt mixture is simulated, and the improvement of the basalt fiber on the pavement performance of the asphalt and asphalt mixture in engineering practice is facilitated.

Description

technical field

[0001] The invention belongs to the field of highway engineering materials, and in particular relates to a preparation and performance evaluation method of basalt fiber pitch which simulates an actual mixing process. Background technique

[0002] The current era is developing rapidly. As the basis of the rapid development and integration of modern economy, transportation is also developing rapidly. Building a transportation power has become a major strategy for my country's current development. Road transportation is one of the main modes of transportation. There is no substitute for importance. Asphalt pavement is the most important carrier of road transportation, and the country's investment in its construction is also increasing. At the same time, the requirements for its performance are getting higher and higher. Therefore, fiber asphalt mixture has been greatly promoted, and basalt fiber asphalt mixture is one of them.

[0003] At present, a large numbe...

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