The present disclosure provides an apparatus and method of use thereof for compressive creep testing of materials in the presence of fluids. The apparatus includes a cantilever arm connected on a first end to a cantilever pivot and including a weight holder on a second end; a first platen connected to the cantilever arm via a swivel located between the first end and the second end; a reservoir; and a second platen disposed within the reservoir and positioned to secure a sample between the first platen and the second platen when a force is applied via the weight holder and the first platen to a sample. Electrical properties of the material can be monitored and measured during the compression creep testing.

The present disclosure provides an apparatus and method of use thereof for compressive creep testing of materials in the presence of fluids. The apparatus includes a cantilever arm connected on a first end to a cantilever pivot and including a weight holder on a second end; a first platen connected to the cantilever arm via a swivel located between the first end and the second end; a reservoir; and a second platen disposed within the reservoir and positioned to secure a sample between the first platen and the second platen when a force is applied via the weight holder and the first platen to a sample. Electrical properties of the material can be monitored and measured during the compression creep testing.

The present disclosure provides for parallel sample stress rupture test in a controlled environment by loading predefined amounts of weight on stack lines; positioning the stack lines on a tensioning platform in alignment with respective upper clamps when the tensioning platform is a first distance away from the upper clamps; clamping samples to a corresponding lower clamp and upper clamp pair; and moving the tensioning platform to a second distance away from the upper clamps that is greater than the first distance such that the stack lines are suspended above the tensioning platform to apply individual tensions to the individual samples based on the predefined amount of weight loaded onto the individual stack lines.

The present disclosure provides for parallel sample stress rupture test in a controlled environment by loading predefined amounts of weight on stack lines; positioning the stack lines on a tensioning platform in alignment with respective upper clamps when the tensioning platform is a first distance away from the upper clamps; clamping samples to a corresponding lower clamp and upper clamp pair; and moving the tensioning platform to a second distance away from the upper clamps that is greater than the first distance such that the stack lines are suspended above the tensioning platform to apply individual tensions to the individual samples based on the predefined amount of weight loaded onto the individual stack lines.

An apparatus for testing paving samples includes a base that includes a paving sample tray about the cabinet and configured for translation relative to the cabinet. A roller is configured for imparting compressive forces to a sample carried by the sample tray. An arm is configured for moving the roller from a stowed position to an in-use position where the roller contacts the sample. A cylinder assembly having a piston therein supplies pressure forces to the arm to move the arm from the stowed position to the in-use position, wherein a depth of travel of the arm is limited by the sample. As the sample is compressed, the depth of travel increases. A measurement device is in communication with the cylinder for determining an amount of travel of the arm to thus determine an amount of compression of the sample.

An apparatus for testing paving samples includes a base that includes a paving sample tray about the cabinet and configured for translation relative to the cabinet. A roller is configured for imparting compressive forces to a sample carried by the sample tray. An arm is configured for moving the roller from a stowed position to an in-use position where the roller contacts the sample. A cylinder assembly having a piston therein supplies pressure forces to the arm to move the arm from the stowed position to the in-use position, wherein a depth of travel of the arm is limited by the sample. As the sample is compressed, the depth of travel increases. A measurement device is in communication with the cylinder for determining an amount of travel of the arm to thus determine an amount of compression of the sample.

A portable multifunctional tester for pollutant erosion effect, including a base, the ejection head of jacking device is provided with a container. The upper end and lower end of the sample are provided with an upper porous stone and a lower porous stone respectively. A metal cover plate is disposed on the upper porous stone. An ejector rod with a circular tray is fixed to the support. The stress controlled one-dimensional load test can be performed by putting weights on the circular tray. A pressure gauge is disposed on the ejector rod. A displacement meter is disposed on the top cover plate. The container has a water inlet and a water outlet connected to its inner chamber. The water inlet, circulating pump, accumulator and water outlet are connected by conduits. In addition, a unidimensional consolidation test and washing test method thereof is provided.

A compaction control system for and methods of accurately determining properties of compacted and/or existing ground materials is disclosed. The compaction control system includes a compaction machine that further includes a vibratory drum (or roller). The compaction machine is equipped with sensors to determine position and heading, vibration amplitudes at selected frequencies, and material type and moisture content information. Further, the compaction control system includes a controller and certain algorithms for processing the sensor information. Namely, a method is provided of using the sensor information to assess the improvement in compaction and then determine whether and/or when further ground improvement solutions are needed.

A compaction control system for and methods of accurately determining properties of compacted and/or existing ground materials is disclosed. The compaction control system includes a compaction machine that further includes a vibratory drum (or roller). The compaction machine is equipped with sensors to determine position and heading, vibration amplitudes at selected frequencies, and material type and moisture content information. Further, the compaction control system includes a controller and certain algorithms for processing the sensor information. Namely, a method is provided of using the sensor information to assess the improvement in compaction and then determine whether and/or when further ground improvement solutions are needed.

A racquet including a frame including a head portion, a handle portion, and a throat portion. The head portion is a tubular structure including inner and outer peripheral walls, each having inner and outer surfaces. The head portion of the racquet being formed of a fiber composite material. The fiber composite material includes a plurality of ply arrangements. Each includes a pair of plies defining first and second angles with respect to a composite axis. A section of the outer peripheral wall from the inner surface to the outer surface includes at least three ply arrangements overlaying each other, and the first and second angles of at least two of the at least three ply arrangements being at least 35 degrees. When the racquet is tested under a racquet torsional stability test, the racquet has an angular deflection of less than 5.5 degrees about a longitudinal axis.