Concrete Roads
and Their Construction
År: 1920
Serie: Concrete Series
Forlag: Concrete Publications Limited
Sted: London
Sider: 197
UDK: 625.8 Con-gl.
Being a Description of the concrete Roads in the United Kingdom, together with a Summary of the Experience in this Form of Construction gained in Australia, Canada, New Zealand and the United States of America.
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68
CONCRETE ROADS
upper layer of concrete was laid immediately upon the fabric
and carefully tamped to bring it to the specified thickness, when
the surface was finished off by men who used contour boards,
which ensured that the surface had the proper form and cross-fall.
The concrete surface was then covered with a 2-in. layer of damp
sand until the concrete had thoroughly set, and an interval of
fifteen days was allowed to elapse before traffic was permitted
on the- new surface. The other half of the road was dealt with
in the same way, and when the full width of the concrete had set
and was thoroughly dry, the surface was tar-sprayed.
A traffic census on the Antrim Road near the Sandy Knowes
cross-roads, where this length was laid, gave a total of 416 tons
per day.
Latest Report, November, 1920.—Mr. D. Megatv, A.M.Inst.C.E.,
the County Surveyor, states that the length is at present in very
fair order and there has been very little expenditure on it since
it was laid, except the cost of tar-spraying each year ; the road
is subject to heavy traffic.