Interlayer tensile strength detecting instrument for asphalt pavement

Abstract

The invention discloses an interlayer tensile strength testing instrument for an asphalt pavement, which comprises a frame, a driving motor, a clamping mechanism, a drawing mechanism positioned above the clamping mechanism and used for upwardly drawing a tested piece by the driving motor through a transmission piece, as well as a force sensor for carrying out real-time test for drawing force applied onto the tested piece, and further comprises a data acquisition and control system used for analyzing and processing a signal tested by the force sensor and used for correspondingly controlling the driving motor according to processing results, as well as a host computer connected with the data acquisition and control system. The force sensor is connected with the data acquisition and control system; the driving motor adopts a stepping motor; and the data acquisition and control system adopts an MSP430 singlechip and carries out two-way communication with the host computer through a USB interface. The invention has the advantages of reasonable mechanical structure, small volume, light weight, high automation degree and simple use and operation; and meanwhile, the invention can effectively carry out real-time monitor and control of the tested piece and greatly improves the testing accuracy.

Description

technical field [0001] The invention relates to a tensile strength detection device, in particular to an asphalt pavement interlayer tensile strength detection instrument. Background technique [0002] According to the construction characteristics of the asphalt pavement, the crushed stone layer is firstly constructed, and then the asphalt base is spread on the formed crushed stone layer, and then the emulsified asphalt is spread on the laid asphalt base, and the asphalt surface layer is laid. Therefore, in A traveling bond is formed between the gravel layer and the asphalt base, and a surface bond is formed between the asphalt base and the asphalt surface. According to statistical analysis of data, the above two bonding layers have a great influence on the performance of the pavement. Therefore, it is of great significance to control the construction quality of the bonding layer during the construction process. In practice, most of the indicators for evaluating the qualit...

AI Technical Summary

Problems solved by technology

[0003] The tensile strength tester for testing the tensile strength between layers of asphalt pavement is mainly composed of a mechanical mechanism and a data acquisition and analysis system used in conjunction with the mechanical structure, but the mechanical part of the existing tester does not clamp the tested part Instead, a pull plate is glued to the upper surface of the test piece through epoxy resin, which not only takes a long time, but also is greatly affected by the outdoor ambient temperature. In addition, each time a sample is finished, the pull plate must be pulled Separating the disk from the sample and cleaning the residue on the surface of the pulling disk is also quite labor-intensive and time-consuming, and it is very inconvenient to use, and it does not have the functions of both indoor and outdoor testing. Low and low degree of automation

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