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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6
CONCRETE ROADS
themselves main roads, several of them link up one main road
with another, and all, therefore, carry a fair traffic, which on some
of them may be described as heavy.
The average cost of the roads so far laid in concrete is 12s. (id.
per super, yard, which, having regard to the low maintenance cost,
compares very favourably with macadam, the maintenance cost
of which is very high in Southwark. The Borough Engineer is
of the opinion that macadam is quite unsuitable for town roads
and streets, and has the utmost confidence in concrete, which he
believes will in all cases ultimately be cheaper than any other
form of road construction.
It is noteworthy that the majority of the men employed for
this work were recently demobilized men who had never previously
done any work of this kind and were trained by the Engineer’s staff.
Fig. 2 shows one of the roads open to traffic.
Latest Report.—-In November, 1920, Mr. Harrison stated that
in two streets weaknesses appeared, but only over very limited
areas, and there was nothing which could be termed a failure.
The principal weakness was in Warner Street. This is thought
to have been due to want of care in curing. In Steedman Street
one weak place developed, the cause of which was believed to
be want of consolidation along the “ joints ” at the beginning
of the day’s work.
All the other streets opened to traffic on the date named were
in excellent condition.
Deptford
New King Street.—This road was laid under the supervision of the
late Borough Surveyor, Mr. F. Wilkinson, A.M.I.C.E., and certain
features render the construction unique.
The length of the street is about 350 yds., and the average
width 16 ft. The traffic passing through this thoroughfare,
though it is not a main road, is said to be amongst the heaviest
in London, since the street leads to the entrance of the Supply
Reserve Department, and owing to the narrowness of the road,
which does not admit of any spreading out of the traffic, the
whole weight and impact is concentrated within narrow limits.
This constitutes a very severe test.
The two special features of this road are :—
1. Double reinforcement, one layer being placed near the top,
and the other near the bottom.