Foamed asphalt mixture and preparation method thereof

Abstract

The invention relates to the field of asphalt mixed building materials, in particular to a foamed asphalt mixture and a preparation method thereof. The foamed asphalt mixture is prepared from the following raw materials in parts by weight: matrix asphalt; water; regenerating cellulose fibers; collecting materials; cement; antimony trioxide; the solvent is 2, 2 '-dihydroxy-4, 4'-dimethoxy benzophenone; the preparation method comprises the following steps: mixing the matrix asphalt, the water and the old asphalt pavement milling material, adding the regenerated cellulose fibers, the antimony trioxide and the 2, 2 '-dihydroxy-4, 4'-dimethoxybenzophenone, heating and mixing to obtain a primary foamed asphalt mixture; mixing the primary foamed asphalt mixture with water, carrying out secondary foaming, and then crushing and screening to obtain a material A and a material B; the material A, the material B, the aggregate and the cement are stirred and mixed in proportion, the foamed asphalt mixture is obtained, and the foamed asphalt mixture has the effects that the temperature for stable combination of foaming water and hot asphalt can be reduced, and meanwhile the construction efficiency is improved.

Description

technical field [0001] The application relates to the field of asphalt mixed building materials, more specifically, it relates to a foamed asphalt mixture and a preparation method thereof. Background technique [0002] Asphalt mixture is a general term for mixtures made by mixing mineral aggregates and asphalt binders. It is a composite material mainly composed of asphalt, coarse aggregate, fine aggregate, and mineral powder. [0003] Nowadays, in the building pavement construction industry, in order to meet the requirements of energy saving and environmental protection, people generally use recycled materials to prepare asphalt mixture, and then pave the road surface. However, the existing foamed asphalt mixture has fast rolling forming and stable performance. Therefore, it is widely used in the laying of asphalt pavement. [0004] At present, when preparing foamed asphalt mixture, it is first necessary to heat the asphalt, and then inject foaming water into the heated asp...

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Problems solved by technology

[0004] At present, when preparing foamed asphalt mixture, it is first necessary to heat the asphalt, and then inject foaming water into the heated asphalt, and the asphalt mixture will expand instantaneously through water evaporation and then return to its original state. However, the above preparation process often requires Only by heating the asphalt to a higher temperature can it be stably combined with the foaming water, so the heating time of the asphalt is long, and harmful substances are likely to be produced during the heating process, which is a factor that restricts the more effective promotion of foamed asphalt mixture

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