water. We waited for the wood strips
in the marking lines to dry out before
we attempted to remove them. In this
way, we made sure that the edges of
the slabs would not be damaged. We
cleaned the grooves and surface of the
concrete after the strips were taken out.

White Playing Lines

HE next step was to dampen the
bottom and sides of the grooves with
a whitewash brush and water. Then we
filled the grooves with a mortar made of
1 part white cement and 2 parts coarse
white sand. The mortar was mixed quite
stiff. We tamped it thoroughly in place
to make sure that the grooves were com-
pletely filled. Care was taken in plac-
ing the white mortar not to smear any

of it on the black surface.
The edges of all slabs and the white
marking lines were finished with an

 

 

Colored topping being placed over concrete base which is tamped to compact
it. Fairly stiff concrete used in both base and top.

Construction view showing strips that form grooves for playing lines; rein-
forcement; dowels; gutter, which carries surface water to drain;

CONCRETE BUILDER

  

 

base for net

posts separated by tarred expansion joints. Waterproof paper used in curing .
is turned back to show that concrete is moist.

edger. We found that by running the
edger first along the hardened concrete

 
 

(Below) Finisher doing

rough steel-troweling immediately after topping has been floated.

that the white mortar is forced away
from the black concrete top and then,
when the white lines were edged, we
had a clean, sharp break between the two
colors. We covered the mortar in the
marking lines with waterproof paper
and let it cure for several days. Then
we wet the entire court several times a
day for a week, after which it was opened
for play.

 

See Next Page...

.... for additional construction
photographs of the black colored
concrete tennis court which Mr.
Simmons has just described. In-
cluded in the group is one picture
showing progress of another simi-
lar job which Bulley & Andrews
obtained after completing the court
for the University of Chicago.
Good work paves the way for other
jobs.

 

 

 

Sign Up Now to Work for
Factories This Winter

Progressive concrete contractors are
making plans zow for the coming winter.
Many factories which have been idle
for months already are swinging into
production; will be in the market for
concrete improvements this winter. See
the managers or owners today; tell them
you want to do their repair work this
winter. Now is the time to get orders
for this work.