Hung Hom Bay, Chai Wan, Kwun Tong, Kennedy Town and Gin Drinker's Bay in order to control dumping.
Other miscellaneous surveys carried out were:
(a) Soundings for various storm water drain and nullah outfalls within the harbour.
(b) Tidal current observations in Kowloon Bay for the preparation of a tidal model of the harbour.
(c) For the demolition of rocks constituting a danger to shipping in Kowloon Bay, the Southern Fairway and off the Eastern tip of Stonecutters Island.
(d) Routine surveys for pier leases and permits.
(e) Detailed soundings for proposed piers at Island House, Tai Po and at Tung Chung, Sok Kwu Wan, Waglan and Tsing Yi Island.
MATERIALS TESTING LABORATORY
260. The Laboratory continued to carry out tests for the Public Works Department, other departments of Government, private architects and building contractors although the total, for varying reasons, is less than in the previous year. Numbering more than 10,000 they included:
(i) 5,129 tests on the compressive strength of concrete, of which 200 were on behalf of private firms.
(ii) The analysis of fresh concrete, cement content of hardened concrete and an investigation into the accelerated strength of concrete.
(iii) 600 odd tests on the physical properties of cements of which several brands were new to the Colony markets.
(iv) 677 tests on the physical properties of various types of soils, including shear strength, C.B.R. values and salinity.
(v) 1,361 tests on concrete aggregate including sieve analyses, crushing strengths, bulk densities and organic impurities.
(vi) 489 hot extraction tests on bituminous macadam and ninety-six others for impurities of bituminous binder.
(vii) 1,413 tests on mild steel rods for their tensile strengths, percentage elongations under load and characteristics when bent cold.
261. Other materials tested included hollow tiles, sand/cement bricks, plastic flooring tiles and steel anchor bolts and sockets.
Page 43
Hung Hom Bay, Chai Wan, Kwun Tong, Kennedy Town and Gin Drinker's Bay in order to control dumping.
Other miscellaneous surveys carried out were:
(a) Soundings for various storm water drain and nullah outfalls
within the harbour.
(b) Tidal current observations in Kowloon Bay for the preparation
of a tidal model of the harbour.
(c) For the demolition of rocks constituting a danger to shipping in Kowloon Bay, the Southern Fairway and off the Eastern tip of Stonecutters Island.
(d) Routine surveys for pier leases and permits.
(e) Detailed soundings for proposed piers at Island House, Tai Po and at Tung Chung, Sok Kwu Wan, Waglan and Tsing Yi Island.
MATERIALS TESTING LABORATORY
260. The Laboratory continued to carry out tests for the Public Works Department, other departments of Government, private architects and building contractors although the total, for varying reasons, is less than in the previous year. Numbering more than 10,000 they included:
(i) 5,129 tests on the compressive strength of concrete, of which 200
were on behalf of private firms.
(ii) The analysis of fresh concrete, cement content of hardened concrete and an investigation into the accelerated strength of
concrete.
(iii) 600 odd tests on the physical properties of cements of which
several brands were new to the Colony markets.
(iv) 677 tests on the physical properties of various types of soils,
including shear strength, C.B.R. values and salinity.
(v) 1,361 tests on concrete aggregate including sieve analyses, crush-
ing strengths, bulk densities and organic impurities.
(vi) 489 hot extraction tests on bituminous macadam and ninety six
others for impurities of bituminous binder.
(vii) 1,413 tests on mild steel rods for their tensile strengths, per- centage elongations under load and characteristics when bent cold.
261. Other materials tested included hollow tiles, sand/cement bricks, plastic flooring tiles and steel anchor bolts and sockets.
43
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