5000 x 3334 px | 42,3 x 28,2 cm | 16,7 x 11,1 inches | 300dpi
Aufnahmedatum:
3. August 2016
Ort:
Preston, Lancashire, UK
Weitere Informationen:
In 1950 increased traffic flows and higher speeds on trunk roads, together with concerns about road safety led to research into the relationship between road materials and skid-resistance. Research at the UK Road Research Laboratory showed a significant relationship between polishing of aggregates used in road surfaces and skid resistance. Tests were devised using an Accelerated Polishing Machine and a friction measuring device, a Skid- Tester, to determine a Polished Stone Value. These developments have resulted in a simple and inexpensive procedure to determine in advance of a road being built what its resistance to skidding will be. Our Accelerated Polishing Machine was first made 25 years ago, and we were deeply involved both in the development in the machine and of the test procedures based on it. More than 1000 of these machines have been supplied throughout the world to Materials Laboratories, Consulting Engineers and Research Institutions. The Skid Tester was first made to a design of the UK Road Research Laboratory. We now offer this machine. Customers may now purchase the two machines required to carry out PSV calculations from the same company, which is also able to provide a full range of spares and technical advice and support.
