The Clarksburg telegram. [volume] (Clarksburg, W. Va.) 1874-1926, 1912-07-04

,S- -. ~ j ~ u, -,----.-- = H.
biader. II too much sand IS usad the
result win be loose sand on the sur
face: II TOO much clay is used the sur
face Of the road VIII become sticky
nftersrains
The best mixture OF sand and clay
Gamble made when the materials are
wet and particularly is this true Of
the plastic or BAH clays.
If the clay IS a plastic or BAH clay
much greater effort VIII be necessary
to obtain complete mixture; II It is
a shaking clay the mixture will be
much more readily obtained. This
kind Of clay is not as satisfactory,
however, as the ball clay, as its bind
ing powers are much less. In select
ing clay for road purposes 1t is always
best to select the stickiest clay avail
able. A common test is to wet the
thumb and place It against piece Of
clay. II the clay viii not stick to the
thumb II is safe to assume that 1t viii
be a poor binder in a sand-clay road.
AS the desirable proportions Of sand
and clay are such that the particles of
clay barely fill the voids between the
grains of sand. It is well in determin-
ing the quantity Of clay to be applied
to a sand road or sand to be applied to
a clay road to know approximately
how much Is needed. A simple method
for determining the relative quantity
Is to take two glasses OF the same size
and I'LL one with dry sand which 1t Is
proposed to use and the other with wa
ter. The water should then be poured
carefully -in the glass Of sand and al
lowed to triokle down through the sand
until 1t reaches the bottom Of the glass.
When the water has been poured into
the glass Of sand to the point OF over
flowing we may assume that the yoids
between the grains of sand have been
flled, and consequently the amount Of
water taken from the full glass would
represent the volume of clay needed to
fill the yoids in a volume of sand equal
to that In the other glass. 1t Is better
to use a little less clay than would up
pear to be. necessary. as the tendency
is to overestimate the amount needed.
Good drainage Is the most essential
feature of the sand-clay road just as It
:. y - ~ uenea - pes u r1au a sanuy
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and ~ raisa M ~ 49, ,,.t,s h 49, s,o
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nc c,.r - san.i nv o,. supbs "a
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oota Y''e Ss'eseS = U"' anu
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