The Redwood gazette. [volume] (Redwood Falls, Minn.) 1873-1940, 1910-07-27

From Good Roads Magazine, New York
should be thoroughly annealed. tough
and durable. regular in size, shape and
evenly burned.
When broken the block should show
a dense stonelike body, uniform in
color inside. free from Jumps Of I'M
crushed clay. lime. air pockets. cracks
or marked Nominations; kiln marks or
surface cracks must not exceed three
sixteenths of an inch in depth.
All blocks so distorted in burning as
to lay unevenly in the pavement should
be rejected.
All blocks should be tested for abra-
sion and absorption, the limits of loss
by abrasion test and amount of abb
sorption to be determined by the en-
gineer in charge of the work
The filler should be composed of one
part each of clean sharp sand and
portland cement The sand should be
dry. The mixture. not exceeding one
third bushel of the sand, together with
like amount Of cement. should be
placed in the box and mixed dry until
ken shade. Then water should be add
ed, forming liquid mixture of con-
sistency of thin cream.
The sides and edges of the brick
should be thoroughly wet before the
filler is applied by being gently sprin-
killed..
The mixture must be removed from
the box TO the street surface with a
scoop shovel. all the while being stirred
In the box as the same is being thus
emptied. The box for this purpose
shall be 4 feet inches long. 80 inches
wide and ii inches deep, resting on
legs of different lengths, so that the
mixtures will readily flow to the corner
of the box. the bottom Of which should
be six inches above the pavement This
mixture from the moment 1t touches
the brick should be thoroughly swept
into the joints.
Two such boxes should be provided
In case the street is twenty feet or less
In width; exceeding twenty feet in
width. three boxes should be used.
The work of filing should thus be
carried forward in line until an adj
vance of fifteen to twenty yards has
been laid. when the same force and
appliances shall be turned back and
cover the same space in like manner.
except to make the proportion two
thirds portland cement and one-third
sand.
To avoid the possibility of thicken-
ing at any point there should be man
with a sprinkling can, the head per-
forated with small holes, sprinkling
gently the surface ahead Of the sweep
ers.
Within one-half to three-quarters Of
an hour after this last coat Is applied
and the grout between the joints has
fully subsidized and the initial set is tax
ing place the whole surface must be
slightly sprinkled and all surplus mix
ture left on the tops of the brick swept
into the joints, bringing them up flush
and full.
After the joints are thus filled flush
\ with the top Of the brick and sufficient
time for hardening has elapsed. 90 that
the coating of sand will not absorb
any moisture from the cement mix
ture, one-half inch Of sand shall be
spread over the whole surface. and in
case the work is subjected to a hot
summer sun an occasional sprinkling.
sufficient to dampen the sand. should
be followed for two or three days.
After brick In pavements are inspect
ed and the surface is swept clean the
pavement shall then be rolled with
a roller weighing not less than three
nor more than Eve tons.