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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70
CONCRETE ROADS
oping contraction cracks due to variations in temperature
and amount of moisture in the concrete. The surface
of the roadway being exposed to great variations in
diurnal weather conditions necessitates steel reinforce-
45.—Pyramidal interlocked reinforcement for roads, rafts,
etc., as used for Port of London Authority roads.
ment near the surface of the concrete, whilst, due to
seasonal changes, a bottom layer of steel is also required.
The pyramidal diagonal bars being anchored in the
bottom layer of concrete also perforin a very important