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US 2016/0103052 A1Published application
Shear testing device and method
AssigneeClemson University
InventorsBetiglu Eshete Jimma, Prasada Rangraju
Life of this patent
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Abstract
A shear testing device and methods for using the device are described. The device can be portable and can quickly and effectively characterize the workability of a granular material such as a fresh pervious concrete. The device can offer a variety of advantages as a workability-characterizing device: it can be small in size, lightweight and can include a simple, gravity-based working mechanism that makes it a suitable device for both field and lab applications.
Claims16
A shear testing device comprising:
- a base, the base comprising a containment frame and defining a receiving area, the containment frame defining a first opening at an upper surface of the containment frame, the base comprising a first end that is closer to the containment frame than to the receiving area;
- a sample container, the sample container defining a second opening at a lower surface of the sample container, the sample container being slidably mountable on the base such that at a first position, the first opening and the second opening are aligned and form a shear plane at an interface of the containment frame and the sample container;
- and
- a hoist in mechanical communication with the first end of the base.
1 more element
A method for determining one or more shear strength parameters of a granular material comprising:
- aligning a first opening of a containment frame of a base of a shear testing device with a second opening of a sample container such that the containment frame and the sample container together define a sample loading area and define a shear plane at an interface of the containment frame and the sample container, the sample container being slidably mounted on the base;
- loading a granular material sample into the sample loading area;
- lifting a first end of the base to a lift point at which the sample container slides from a first position to a second position due to gravitational force acting on the sample container, the base being at an angle to horizontal at the lift point;
- and
- determining one or more shear strength parameters of the granular material from the angle.
2 more elements
Dependencies are inferred from the claim text.