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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5ß
CONCRETE ROADS
Northumberland
Longhoughton Road.—In May, 1920, the first reinforced concrete
road in Northumberland was commenced by the Alnwick Rural
District Council under the supervision of their Highway Surveyor,
Mr. Nicholas Bean. The road, which begins at the Longhoughton
railway station, is about a quai'ter of a mile in length and 24 ft.
in width. With a gradient of 1 in 18 this hill has always been
a source of trouble to the authorities, since, being the main outlet
of the Northumberland whinstone quarries, it has to bear very
heavy traffic, consisting mainly of steam wagons carrying loads of
five tons of stone between the quarries and the railway, and has
always had a tendency to “creep.”
The concrete, which is 9 in. thick, was laid on a bottom of
whinstone setts and consists of 2| parts of Northumberland
whinstone chippings graded from 1| in. to 1 in., and 1| parts of
|-in. chippings and coarse whinstone grit, to 1 part of Portland
cement. This aggregate is an ideal one for road work, being of a
very hard, dense nature.
Fig. 37.—Longhoughton Road, Northumberland, showing road-
making machine at work.
The Main North Road.—The first section of this road to be laid
in reinforced concrete is situated between Wideopen, about five
miles north of Newcastle, and Seaton Burn, a length of about
one mile. The road is practically level, the only gradient being,
1 in 30.