Construction Materials Testing Equipment
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Construction Materials Testing Equipment
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Measures friction (skid resistance) on flat, cambered, or gradient road surfaces. Originally developed by the Transport and Road Research Laboratory of Great Britain.
A pendulum arm, having a spring-loaded rubber slider on the pendulum foot. Device is placed on the portion of the road surface to be tested. It is then leveled, and the height of the center of suspension of the pendulum is adjusted to a fixed value which is read on a special gauge.nThe pendulum is then released from its horizontal position, to swing down freely until the rubber slider contacts the test surface. As the slider travels across the surface for a fixed distance, the pendulum is slowed and a frictionally-constrained pointer affixed to the pendulum arm measures the highest point in the pendulum arc. The position of the pointer is then read on a measuring arc graduated from 0 to 150. Pointer readings indicate the resistance to skidding of the test surface.
Dimensions (include carrying case): 31" x 25.5" x 9" (787 x 648 x 229mm). nMeets ASTM E303.
Shipping wt. 75 lbs. (34.0kg)
$7,848.00 Add to Order
Portable Skid Resistance Tester— H-3204
Rubber slider, 1-1/4", for lab use
$100.00 Add to Order
Portable Skid Resistance, Rubber slider, 1-1/4"— H-3207
Rubber slider, 3", for field use
$120.00 Add to Order
Portable Skid Resistance, Rubber slider, 3"— H-3208
Laboratory base plate
$972.00 Add to Order
Portable Skid Resistance, Laboratory base plate— H-3206
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The Accelerated Polishing Machine polishes samples of aggregates, simulating actual road conditions, and is used in conjunction with the Portable Skid Resistance Tester to determine the Polished Stone Value for aggregates used in road surfaces, and gives a measure of the resistance to skidding. Fourteen specimens are clamped around the "road wheel" of the polishing machine, and subjected to two stages of polishing by a loaded rubber tire. First by corn emery, and secondly by emery flour. Use of the Accelerated Polishing Machine and the Skid Resistance Tester in road construction has had a major influence in reduction of accidents. The H-3205 features:
$18,475.00 Add to Order
Accelerated Polishing Machine— H-3205.3F
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