Model: TSY-12 type I. [Scope]: geosynthetic direct shear apparatus through the standard sand / geotextile direct contact surface shear test to measure the friction properties of sand / geotextile interface. Applies to all geotextiles and related products. High-precision stepper motor. [Standard]: ISO12957.1, GB / T17635.1, ASTMD5321, JTGE50T1129, SL / T235-1999 two, [Technical parameters]: ● Cut box size 300 × 300mm ● Measuring range 0 ~ 10KN ● normal pressure On 50KPa100KPa150KPa200KPa ● horizontal shear rate 0.02 ~ 3mm / min ● horizontal shear displacement 0 ~ 30mm ● Power AC220V50Hz three, one would sample tile located in the lower part of the shear box rigid horizontal base, held in front front shear zone. Between the specimen and the base with glue (such as using a standard P80 alumina friction base without adhesive). After bonding the specimen should be smooth, no folding and fold. Tests do not allow a relative slip between the specimen and the base. 2 installed on the shear box: pre-weighed by the quality standard sand (Note: The standard sand user-supplied) to fill the shear box, filling thickness of 50mm. Sand thickness should be uniform, after compaction dry density of 1750kg / m3 3. load meter installation level, and the sample is applied 50KPa (hang baseline weight for 50KPa, and another three standard weight, plus one for each pressure increase 50KPa) of Act 4 is applied to the pressure level of load, so that as the rate between the upper and lower shear box for the corresponding displacement of 1mm / min ± 0.2mm / min's. Continuous or indirect measurement of the shear force T, while the corresponding relative displacement of the recording ΔL, the interval time is 12S, also starts the encryption depending on the circumstances, the time until the end of the test to reach 16.5% of the length of the shear plane. LCD Table 5 steps: 1) Turn the power switch 2) Press the function key to open a new open test 3) Enter the desired test speed, press the Enter key on-screen: "shear force", "shear stress", "Peak "" displacement. " 4) Press the Start button to start the test (ie: incremental stress, the first normal stress test 50KPa, valid results automatically into the next 100KPa, 150KPa and 200KPa) 5) displacement starts counting, completed a total of 16.5 contact surfaces %, the test is completed, automatic shutdown, screen test data results, as the test is correct press the Enter key 6) Press the function key to open the results of the query, screen test results 7) Press to confirm the printing, the printer starts working four, when After the end of each job class, the table should be all cleaned. Do machine maintenance, easy to operate for the next