Digital-display type pavement material strength instrument

A digital display technology for pavement materials, applied to the analysis of materials, strength characteristics, instruments, etc., can solve problems such as error-prone, time-consuming and labor-intensive, and loads applied to penetrating rods, so as to achieve small errors, accurate test results, and save time and money. human effect

Pending Publication Date: 2020-03-06
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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Problems solved by technology

[0004] 1. Since the contact surface between the penetrating rod and the soil sample is in the test cylinder, errors are likely to occur in visual observation, resulting in that the penetrating rod is not in full contact with the surface of the soil sample or the penetrating rod is loaded in advance;
[0005] 2. Since it is necessary to read the readings of 3 dial gauges at the same time

Method used

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  • Digital-display type pavement material strength instrument

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Effect test

Embodiment

[0028] As mentioned above, the operation steps of the present invention are as follows:

[0029] Step 1: Put the sample into the test tube 6, and place the test tube 6 on the lifting platform 8 smoothly in the center;

[0030] Step 2: Turn on the power, adjust the speed button 11 as a fast ascent button, ascend until the contact indicator lights up, and then the penetrating rod 5 is in full contact with the sample surface without load;

[0031] Step 3: Click the setting button on the operation keyboard 10 to preload. At this time, only the reading of the force sensor 1 on the force measuring ring 2 is displayed on the display 9. Click the number button on the operation keyboard 10 to preload a force of 45N, Click the ascending pattern button on the operating keyboard 10 to raise the lifting platform 8 to obtain the displacement of the force measuring ring 2 (obtained by the force measuring ring correction coefficient), and then click the stop button;

[0032] Step 4: Click the reset b...

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Abstract

The invention provides a digital-display type pavement material strength instrument. The strength instrument comprises a case, and a support is arranged on the upper end face of the case, a force measuring ring is arranged on the support; a force sensor and a penetration rod are arranged on the force measuring ring, and a contact sensor and a displacement sensor are arranged on the penetration rod; a lifting table is arranged at the top of the case, and a test cylinder is arranged on the lifting table, wherein the position of the test cylinder corresponds to the position of the injection rod.According to the invention, the displacement sensor is used for replacing a dial indicator, and a digital display system is used for automatically recording readings to replace naked eye readings, sothe test data can be exported after the test is completed; one person can independently complete the operation, so a large amount of time and manpower are saved, and the test result is more accurate;the contact sensor replaces traditional naked eyes to observe the contact condition of the penetration rod and the surface of the soil sample, and the test result error is smaller, more accurate and more reliable.

Description

Technical field [0001] The invention relates to a digital display pavement material strength meter, which belongs to the technical field of California bearing ratio (CBR) test and detection equipment, and is suitable for testing the strength index of roadbed soil and pavement materials to perform the California bearing ratio (CBR) test detection of soil . Background technique [0002] California load-bearing ratio is the strength index of subgrade soil and pavement materials, and it is one of the main parameters of flexible pavement design. In our country's flexible pavement design, although the elastic modulus of subgrade soil and pavement materials is used as the design parameter, CBR is still used as a mechanical index in the subgrade and pavement construction specifications. It can be seen that the accuracy and reliability of CBR test results are very important for evaluating the mechanical properties of subgrade and pavement materials. [0003] The current working principle ...

Claims

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Application Information

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IPC IPC(8): G01N3/06
CPCG01N3/06G01N2203/06G01N2203/0676G01N2203/0682
Inventor 陈光耀余杰
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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