 | The University of Virginia record February, 1909 |  |
ROAD MATERIAL TESTS.
In the Road Material Tests the machines used are mainly those
devised by Dr. Logan Waller Page, director of the United States office
of public roads. For measuring the strength of the stone cylindrical
samples are cut out with a diamond drill and tested under impact
and in the 40,000-pound compression machine. The resistance to abrasion
is measured on fragments of the stone, rotated in heavy cast
iron cylinders mounted on their diagonals. The binding power of the
dust is measured by impact tests on cylindrical briquettes formed
under heavy hydraulic pressure. The dust for these briquettes is
produced in a ball mill fed with fine stone broken in a small crusher.
This part of the testing outfit has been installed largely by the generous
aid of Dr. Page. It is hoped that useful experimental researches
on the road-building rocks and gravels of Virginia may be carried
out with it.
| The University of Virginia record February, 1909 | |