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Low temperature fracture testing instrument of asphalt mixed material

A technology of asphalt mixture and fracture test, which is applied in the direction of instruments, scientific instruments, analytical materials, etc., can solve problems such as shrinkage and deformation, and achieve the effect of avoiding shrinkage and deformation and ensuring consistency

Inactive Publication Date: 2006-01-11
马骉 +2
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Problems solved by technology

[0003] In order to solve the deficiencies in the above-mentioned background technology, the present invention provides a low-temperature fracture tester for asphalt mixture, which not only ensures the consistency of the cooling rate and temperature in the test process, but also avoids the shrinkage and deformation of the specimen support. And the heating expansion of the bracket is used for strain compensation, eliminating the influence of the strain on the test results caused by the tension applied by the force sensor, and also ensuring that the length of the specimen remains unchanged during the test

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  • Low temperature fracture testing instrument of asphalt mixed material

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Embodiment Construction

[0014] Referring to the attached figure, the Asphalt Mixture Low Temperature Fracture Tester is a special equipment used to evaluate the low temperature crack resistance of asphalt mixture. It uses the refrigeration system to cool the specimen, and measures the fracture temperature, Fracture strength, to analyze the low-temperature crack resistance of the mixture. The structural composition of the asphalt mixture low-temperature fracture tester is shown in the attached figure, which is mainly composed of a reaction force frame, a specimen fixture 9, a cooling system, a control system 1, a data acquisition system, and a heating compensation system 4. The counter force frame is composed of a base and a bracket 5, and is required to have sufficient strength to avoid excessive deformation. The test piece fixture 9 includes two sets of upper and lower sets, which are used to fix the test piece 7. Each set includes two sets of dovetail grooves connecting the upper and lower pieces. ...

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Abstract

The present invention relates to an asphalt mixture material low-temperature breaking test instrument. Said test instrument includes base seat, supporting frame, sample holder, force sensor, heating compensation system, control system, heating jacket and temperature sensor. Besides, said invention also includes condenser tube, heat-insulating tube and constant temperature channel, etc.

Description

1. Technical field: [0001] The invention relates to a material testing instrument, in particular to an asphalt mixture low-temperature fracture testing instrument. 2. Background technology: [0002] The existing low-temperature fracture test instrument for similar asphalt mixture is the Constrained Specimen Freeze Break Tester (TSRST for short) developed in the United States. The instrument uses the environmental temperature control box to cool the test bracket and the test piece. The cooling method adopts the air convection method; Restore the original length; these two structural defects make the test error larger, resulting in the measured fracture temperature being of little significance in practical applications, which also limits the wide application of the instrument. It is not recommended after the key analysis in the American SHRP study the device. The air convection method is used to cool down, so that the temperature of the convective medium measured by the temp...

Claims

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Application Information

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IPC IPC(8): G01N3/18G01N3/02
Inventor 马骉毛雪松侯仲杰
Owner 马骉
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