Steel slag and rubber asphalt concrete and preparation method thereof

Abstract

The invention provides a steel slag and rubber asphalt concrete and a preparation method thereof. In the concrete, the steel slag is selected as a coarse aggregate and rubber asphalt is selected as a binder, and the concrete further comprises a fine aggregate and a filler; the mineral aggregate of the asphalt mixture is graded to form a coarse aggregate gap gradation framework solid type; the ratio of the rubber asphalt to the mineral aggregate is comprehensively determined through a Marshall compacting experiment to determine the range via the volume parameter of a Marshall test piece and verification on the road properties such as high-temperature rutting resistance and water damage resistance; when the rubber asphalt and the mineral aggregate are mixed and stirred, the heating temperature of the rubber asphalt is 175-180 DEG C and the heating temperature of the mineral aggregate is 10-30 DEG C higher than that of the rubber asphalt; moreover, the dry mixing time of the mineral aggregate is 15-20 s and the wet mixing time of the mineral aggregate is 35-40 s; and the ex-factory temperature of the steel slag and rubber asphalt concrete formed after the mixing and the stirring is 175-185 DEG C. The invention replaces the mineral aggregate by the steel slag, and can recycle the waste materials, save the stone resources, and reduce the destruction from the stone mining to the environment.

Description

technical field [0001] The invention relates to an asphalt concrete and a preparation method thereof, in particular to a steel slag rubber asphalt concrete using steel slag as a coarse aggregate and rubber asphalt as a binder and a preparation method thereof. Background technique [0002] Asphalt concrete is generally composed of asphalt and mineral aggregates (coarse aggregate, fine aggregate, filler). In this technical field, the commonly used asphalt is mainly SBS modified asphalt, and the commonly used aggregates mainly include limestone, basalt, granite, etc. , commonly used fillers include limestone ground fine mineral powder, slaked lime, cement, etc. Asphalt concrete composed of the above materials cannot effectively solve two contradictions: one is the contradiction between high temperature stability and fatigue resistance and low temperature crack resistance; the other is asphalt Conflict between concrete surface properties (slip resistance) and durability. [000...

AI Technical Summary

Problems solved by technology

In order to reduce environmental pollution, steel slag has been tried to use in road engineering cement concrete pavement. However, steel slag is used in asphalt concrete, generally using ordinary asphalt or SBS modified asphalt. At present, steel slag has not been used as aggregate and rubber in the industry. Example of mixing asphalt to make steel slag rubber asphalt concrete

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