An instrument for measuring the thickness of asphalt concrete loose pavement

Abstract

The invention discloses a bituminous concrete loose-spreading thickness measurer which comprises a heat insulation rubber handle, a cylindrical scaleplate with scales, and a sleeve, wherein the heat insulation rubber handle is fixedly connected with the upper end of the cylindrical scaleplate with the scales; the lower end of the cylindrical scaleplate with the scales is fixedly connected with an insertion plate; the lower end of the insertion plate is wedge-shaped; a guide groove is formed in the axial direction of the outer wall of the cylindrical scaleplate with the scales; a guide boss is arranged on the inner wall of the sleeve in the axial direction; the bottom of the sleeve is integrally connected with a circular base plate; a rectangular opening with the width being matched with the width of the insertion plate is formed in the center position of the circular base plate; the insertion plate can extend out of the rectangular opening; a jackscrew hole is formed in the upper end of the sleeve; a jackscrew is screwed into the jackscrew hole; the insertion plate is made of stainless steel; the lower end of the cylindrical scaleplate with the scales and the insertion plate are inserted into the sleeve; the guide boss on the inner wall of the sleeve is positioned in the guide groove in the outer wall of the cylindrical scaleplate and is in sliding fit with the guide groove. The bituminous concrete loose-spreading thickness measurer is simple in structure, low in production cost, convenient and quick for measurement and high in measurement precision.

Description

technical field [0001] The invention relates to a measuring instrument, in particular to an instrument for measuring the thickness of asphalt concrete loose paving. Background technique [0002] According to the "Highway Engineering Quality Inspection Standards", the thickness of asphalt concrete pavement is a very important technical index. In order to ensure the thickness of the asphalt pavement, during the asphalt concrete paving process, it is necessary to detect the loose paving thickness of the mixture at any time to determine whether it meets the standard. At present, in the process of asphalt pavement construction, the measuring tools widely used to measure the thickness of asphalt concrete loose pavement are: screwdriver or steel bar and steel ruler. Insert a screwdriver or a steel bar into the pavement, and measure the thickness of the loose pavement with a steel ruler after pulling it out. This thickness measurement method has poor accuracy, and the measurement ...

AI Technical Summary

Problems solved by technology

This thickness measurement method has poor accuracy, and the measurement personnel are easily burned by the mixture during the measurement process

[0003] The published patent No. 200820019074.X Asphalt Mixture Loose Pavement Thickness Tester requires one hand to rotate the handle and the other hand to press down the handle during measurement, which is inconvenient to operate; in addition, the tapered rod is designed in a conical shape, which is easy to insert When the bottom is mistakenly inserted into the lower layer mixture, the reading is inconsistent with the actual value

[0004] Patent No. 201320082660.X Improved Asphalt Pavement Thickness Measuring Tool, the design of its balance bracket cannot guarantee the verticality requirements of the pressure bar during the measurement process, and the design of the other three pins also restricts its limit measurement depth, too long pins more fragile

Images