Gyratory compactor for fabricating test piece of asphalt road material

Abstract

The invention relates to a gyratory compactor of asphalt mixture, which comprises a control device, a sensing system, a motor, a reducer, an axial compacting mechanism, a deflection mechanism and a mould. The gyratory compactor is characterized in that the motor is connected with the reducer, the reducer is connected with the axial compacting mechanism and the defection mechanism, the control device is connected with the motor and the sensing system, the sensing system is connected with the axial compacting mechanism and the deflection mechanism, the motor is a common alternating current asynchronous motor; the defection mechanism can realize the adjustment of an included angle between the axle line of the mould and the axle line of a compaction axle of the axial compacting mechanism. The invention has simple structure and complete function, can reach the design requirement, greatly lowers the cost because of adopting common parts, and has remarkable economic benefit, large market demand caused by the boosting of infrastructure, and very wide market prospect.

Description

technical field [0001] The invention relates to a rotary compactor for compacting hot mix asphalt mixture (HMA) into a standard test piece sample for analysis. Background technique [0002] It has been generally believed in the highway industry that there are many defects in the traditional Marshall asphalt mixture design method for highway asphalt pavement. The reason for these defects is that the Marshall asphalt mixture pavement design method uses the method of repeated tamping and axial compaction of the pavement material sample with a heavy hammer when making the asphalt mixture sample analysis specimen. This method only considers the axis This is not consistent with the actual stress during asphalt pavement construction during paving and rolling, so the Marshall asphalt mixture design method cannot control the early failure of asphalt pavement. [0003] In the 1990s, the United States adopted Superpave technology for asphalt mixture pavement design. In 2000, Superpave...

AI Technical Summary

Problems solved by technology

The promotion and application of Superpave technology cannot be discussed without a rotary compactor. The power part of the current rotary compactor uses a DC stepping motor, and the control part uses a single-chip microcomputer as the core component of the control system. The kneading effect is achieved through The structure of a sliding plate connected to the head of the compaction mechanism is generally complex in structure, very expensive in cost, and there is a phenomenon of out-of-step during use, which affects the final test result

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