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Introduction of Direct/Residual Shear Apparatus

Automatic Digital Direct Residual Shear Machine is used to determine the resistance to shearing of all types of soil specimens both consolidated and drained, undisturbed or remoulded samples. The Automatic Direct / Residual Shear Apparatus can accommodate specimens dia. 50, 60, 100 mm, and square 60x60, 100x100 mm. The Automatic Direct / Residual Shear Test Machine is equipped with a control closed loop motor with epicycloid reducers.

At the beginning of each test, the machine performs an automatic and complete internal check, a position reset with the elimination of all possible positioning errors and all pauses. The input of all the test patterns is achieved by the interaction of the keyboard and the alphanumeric display with self-memory, thus granting infinitesimal resolutions in short times. All data are input and stored when the machine is in stand-by, without affecting the specimen under test with quick machine setting. Possibility to fix maximum excursion of the shear box, so as to interrupt automatically the test. It is possible to input a different return speed (residual shear) in relation to the one used for the shear test, thus allowing a quick playback to select the residual shear test, saving a lot of time.

Possibility to identify directly on the consolidation curve the effects of the primary consolidation, only with data acquisition version. Automatic calculation of the appropriate shear velocity by selecting the optimal consolidation parameter among t50, t90 and t100, improving efficiency and cost effectiveness, only with data acquisition version.

Technical features:
- Display of both speed and displacement with 0.00001 mm resolution
- Shear speed between 0.00001 to 15.0000 mm/minute
- Max shear load: 5000 N possible on the whole speed range
- Possibility of direct vertical load, or with a lever arm ratio 10:1
- Max vertical direct load: 500N; with lever arm: 5500N
- Box group mounted on ball track with high quality anti-friction system
- Extremely easy and practical use, not requiring qualified staff.
Shear box, hollow punch and tamper are not included in the standard supply and have to be ordered separately.

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For more information about our testing instrument, please contact
· +86-21-6780 0179
· info@qinsun-lab.com
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