Evening star. [volume] (Washington, D.C.) 1854-1972, 1911-07-09

separation of the oil from the emulsifying
agents had taken place in each barrel
and Ii was found impossible to emulsify
this separated oil. which f1oated to the
top of the mixture in the sprinkling cart
This oil caused considerable trouble by
clogging the sprinkler and, when applied
to the road produced soft. sticky places.
which had TO be sanded. In order to avoid
this trouble, the watering cart was never
completely emptied on the road, but the
separated oil was run off on vacant lot.
Notwithstanding this trouble, the mate
rial as applied proved to be quite salts
factory and would undoubtedly have
shown up to better advantage had 1t
been used before the separation had TAX
en- place.
runs south almost parallel to 18th street
1t is 750 feet in length. 1l1 in width and
contains 1910 square yards 1t was not
in as good condition before treatment as
section No 2, because the surface was
raveled in places and the coarse stone of
the foundation was showing through.
This road should have been reconstructed.
but a no money was available for the
purpose il was decided to try to hold il
together until the following year with
surface applications of the same oil enul-
sion as used in experiment No . The
emulsion was applied to the surface. after
il had been swept, in the same manner
as described under experiment No ..
This material was handled and applied
in the same manner as the conce ntrated
waste sulphite liquor previously described.
After the third application the road was
sanded in places where the oil had made
the surface sticky. A thin asphaltic skin
was gradually formed over the road,
which gave 1t the appearance Of bi-
luminous macadam road with a mosaic
surface.
Section No. adjoins section No. !. and
runs south almost PARALLEL to 14th street.
1t is 80 feet in length. 1873 feet in width,
and has an area of 1.317 square yards.
The material used, the method of treat
ment and the reason for treatment were
the same as descrih under experiment
No g. This section was in even worse
condition than section No. ;. ard received
one more application of the emulsion than
the former
Section No 5 is short stretch of
nacadam road constructed in 1909. 1t
lies between the two wings Of the new
department building and connects an as
phalt pavement in the department grounds
with street southwest. 1t is subjected
the other sections. Both the concen-
trated waste sulpnite liquor and the OIL
emulsion previously described were used
in the surface treatment of this road, as
shown in table o3. This section is 1872
feet long For length of III feet /: is
Is feet wide, while for the remaining 10
feet it narrows down to IL feet Its total
area is 372 square yards.
Section No. 6 is a short stretch of
macadam road cons rlcted at the same
time as section No. ;. in 1909. II consti-
tutes a horseshoe approach leading from
18th street to the east wing of the new
Department OF Agriculture building. Ii
* % feet long, and for length Of 2l2
feet it is IL feet wide. while for the re-
manning 43 feet ii is only feet wide. Its
total area is a21 square yards. This sec
ton was not subjected TO enough traffic |
to keep IL In good condition. and in places |
the surface was loose and raveled With |
the exception of the addition OF some
stone screenings. this section was treated |
Isxa4la