1
**
243
mortar for incorporating them with the concrete.
I consider this essential and must request that, future, all these large blocks should be set in cement
mortar,
matrix
to ensure their thorough incorporation with the
of
8 to I concrete.
The proportion of 50 per cent of blocks of stone is
great, and necessitates the most careful supervision.
I cannot consent to the suggestion of the
Surveyor General to use
LE
**
Chinese hydraulic Lime Concrete
"for 30 feet of the uppermost section of the Dam "i
order to effect a probable saving of £9,000 to £10,000 but would far rather increase the present cost by
reducing the proportion of large blocks of stone, as
there can be no
economy
water works, as
greater mustale than so called
of this sort, in the construction
every pound sterling expended now in the use of
the best materials may save a much greater future
expenditure
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