126
112
is
is pecommended that the rest of
in at the back should be
the
filling
made up of the sand taken from
the shallowest places along the foot
of
the wall.
Concrete.
After the typhoon of 187/14
I had the honour to recommends wi that the backing proposed for the sea wall should be of Pallands ce- ment concrites having but liitter faith in the Chinese live coverctos used by this office.
the Royal Engineer Depart. manh
DE.
in the sea.
Come under.
works which had
my investigation during my
then short experience in China. At the
same time the
great
Cost
of
Porstand
cement landed in Hong Kong, the def. :ficulties which attached to the acquisition
of
of a perfectly good and preshly buent article throughout in larger consignments and its rapid deterioration on
arrival
in this climate could not but impress one with the extreme divirability
leave
experiment untried with) local materials in the hope of ar-
at comes
riving factory result or
more or less satis
else convi
convincing
purely Chinese
self definitively that a purely concrete of hydraulic properties
unattainable.
wa J
Accordingly brats weres made with freshly burnt coral and shell limer mixed in various proportions with the clean sharp feldspathic.
of the place ands left to set under- water with but the indifferent results expected.
Discarding