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105
EXPERIMENTAL PAVING.
By arrangement with the Road Board a portion of Kingston
Road, from the Borough boundary to Old Portsmouth Road, has
been re-surfaced, as an experiment, with various binding materials.
The total cost of the work was £1,946, of which the Road
Board contributed £1,447.
The following is a description of the various materials laid,
viz. : —
Section No. 1 consists of tarred slag laid in two
layers, the first graded from 2½ inches down to 1½ inches,
and the second from 1½ inches to ½ inch, the surface
being finished with fine uncoated chippings, making a
total thickness of 4 inches. The area of this section
is 1,629 square yards. It was laid by Messrs. Constable,
Hart & Co., Ltd., at the contract price of 4s. per super,
yard, plus a maintenance charge of 2d. per super, yard
per annum for two years.
Section No. 2, by Tarmac, Ltd., also consists of tarred slag,
but is made up of three layers, the first graded from 21 inches
to 1½ inches, the second from 1½ inches to ½ inch, and the
third composed of fine topping, with a surface dressing of
slag dust, the whole constituting a finished thickness of
4 inches. In area this section is 1,900 square yards, and the
contract price was 3s. 10½d. per super, yard for construction,
with an additional charge for maintenance at the rate of 1½d.
per super, yard per annum for three years, to include painting
with tar each year.
Section No. 3, by Taroads Syndicate, Ltd., consists of
Guernsey granite coated at the roadside with special bituminous
composition 14 days before being spread. It is laid in two
layers, the first graded from 2½ inches to ½ inch, and the second
3/8 inch topping dressed with fine uncoated chippings. The
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