Bending creep testing device for asphalt mixture

Abstract

The invention discloses a bending creep testing device for an asphalt mixture. The device comprises a rack, wherein a servo motor, a speed reducer and an upper pressing head, which are in sequential transmission connection, are arranged on the rack; a high and low temperature environment testing box is arranged in the rack; the upper part of the upper pressing head extends into the high and low temperature environment testing box; the upper pressing head is provided with a load sensor; a lower supporting seat which is opposite to the upper pressing head is arranged in the high and low temperature environment testing box; the lower supporting seat comprises a left supporting head and a right supporting head; a linear variable differential transformer (LVDT) sensor is arranged between the two supporting heads; and the high and low temperature environment testing box is provided with a corresponding heating device and a corresponding refrigerating device. The bending creep testing device for the asphalt mixture has the advantages that the upper pressing head is driven by the servo motor, the motion accuracy of the pressing head and the constancy of pressure can be effectively kept, the high and low temperature environment testing box is relatively closed, refrigerating and heating functions are integrated on equipment, space can be saved, and waste is avoided; and the servo motor, the load sensor, the LVDT sensor, the refrigerating device and the heating device can be automatically controlled in a centralized mode through a circuit, and the degree of intelligence of operation of the equipment is improved.

Description

[0001] technical field [0002] The invention relates to an asphalt mixture bending creep test device, which is used for measuring the bending creep strain rate of a hot asphalt mixture specimen under the conditions of specified temperature and loading stress level, so as to evaluate the deformation performance of the asphalt mixture. Background technique [0003] Most of the existing asphalt mixture bending and creep test devices adopt lever structure as the pressurization method. The pressurization accuracy and automation of the equipment are not high, which greatly affects the test efficiency; and its temperature control is difficult to meet the test requirements. Contents of the invention [0004] The object of the present invention is to provide a kind of accurate, highly automated, easy-to-operate asphalt mixture bending creep test device for the defect of above-mentioned prior art. [0005] Its technical solution is as follows: It includes a frame, which is equipped...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing asphalt mixture bending and creep test devices adopt a lever structure for pressurization. The accuracy and automation of the equipment are not high, which greatly affects the test efficiency; moreover, the temperature control is difficult to meet the test requirements.

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