High-modulus asphalt mixture and preparation method thereof

Abstract

The invention relates to a high-modulus asphalt mixture and a preparation method thereof. The high-modulus asphalt mixture is prepared from components of raw materials in percentage by mass as follows: 75%-90% of aggregate, 1.5%-6% of mineral powder, 1.5%-5% of matrix asphalt and 0.015%-0.5% of a high-modulus additive. According to the high-modulus asphalt mixture, residues obtained after direct coal liquefaction can be turned into valuables, the pavement performance of the asphalt mixture can meet the performance requirements of a hot-mixed modified asphalt mixture, the high-temperature performance of the asphalt mixture is superior to that of the hot-mixed modified asphalt mixture, and the resilient modulus of the asphalt mixture is far higher than that of the hot-mixed modified asphalt mixture. Therefore, the high-modulus asphalt mixture has remarkable economic and social benefits.

Description

Technical field [0001] The invention belongs to the technical field of road building materials preparation, and relates to a high modulus asphalt mixture and a preparation method thereof. Background technique [0002] Internationally, when preventing various damages to asphalt pavements, the prevention of rutting has always been the first priority. Prevention measures mainly include optimization of mixture gradation, improvement of rheological properties of asphalt and mortar, and the addition of admixtures. As a high-modulus asphalt mixture with excellent high-temperature performance, it has been widely used in road construction abroad, and its application prospects are very broad. [0003] In the method of adding admixtures, it usually refers to the high modulus asphalt mixture processed by adding modifiers such as SBS, SBR, PR MODULE high modulus additives to the base asphalt. High modulus concrete can reduce the deformation of asphalt concrete under vehicle load by increasing...

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Problems solved by technology

At present, the research on coal liquefaction residue is still limited to the research on modified asphalt, and rarely involves the research on high modulus additives of mixtures.

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