The Cooper Pendulum Skid Resistance Tester is one of the best portable skid resistance testers in the world.

The Cooper Pendulum Skid Tester ‘CRT-PENDULUM’ is a high quality, skid resistance testing instrument. Originally designed in the 1940’s in the US, the instrument was further developed in the 1960’s at the UK Transport Research Laboratory for the testing of road surfaces. The CRT-PENDULUM measures the frictional resistance between a rubber slider mounted on the end of a pendulum arm and the test surface. This provides highway engineers with a routine method of checking the resistance of wet and dry surfaces to slipping and skidding, both in the lab and on site. It is based on the Izod principle: a pendulum rotates about a spindle attached to a vertical pillar. At the end of the tubular arm a head of known mass is fitted with a rubber slider. The pendulum is released from a horizontal position so that it strikes the sample surface with a constant velocity. The distance travelled by the head after striking the sample is determined by the friction of the sample surface. A reading of Skid Resistance is then obtained.

The description from the Producer's website (accessed on May 9th, 2020):

Pendulum skid tester


The TM-0108 series meets the requirements of the following standards: EN12697-12, EN12697-23, EN 12697-34, EN13286-47, BS1377:4, NF P94- 078, UNI CNR 10009.
This versatile electromechanic testing device is used for various displacement controlled tests, including CBR, Marshall, Triaxial and Uniaxial tests. In the upper part of the two-column frame, a transverse beam is fixed, which can be adjusted to different heights depending on the accessories used. The accessories must be ordered separately. The machine is supplied with a load cell and displacement transducer.
The Multiplex machine has a load capacity of 50 kN. It features a servo motor and a data collection and control system with display. It can perform tests within the range of displacement speed from 0.00001 mm/min to 51 mm/min. The machine can also perform tests with a controlled load.

The description based on the information from the Producer's website (accessed on May 9th, 2020):

Automatic marshall stability test machine – prasa



This machine is designed to automatically compact specimens for Proctor and CBR testing, eliminating the laborious hand compaction method. The height of the rammer drop is adjustable from 305 mm to 457 mm. The weight of the rammer can be altered from 2.5 kg to 4.5 kg to suit test requirements.
An automatic blow pattern ensures optimum compaction for each layer of soil. The rammer travels across the mould and the table rotates the mould in equal steps. The number of blows per layer can be set at the beginning of the test by a digital counter. The principle of the design is to allow the hammer to drop the required height into the soil in the mould which rotates approximately 40 degrees between each blow. When compacting 100 mm diameter specimens the unit operates on a single radius and when compacting 150 mm diameter specimens the unit operates on inner and outer radius to obtain an even compaction.

The description based on the information from the Producer's manual and website (accessed on May 9th, 2020):

Automatic soil compactor