. Water & sewage works . 7b. Same except that chips wereinto the dry stone, gal. ofasphaltoilene aplied and chips rolledinto surface. Condition about the sameas Sec. 3. The single coat section, 7b, isthe better and is in good condition, fullyequal to Sec. 3. in about same condition in October, 1913,as No. 3, except much more wavy in thehalf of the width next the gutter, wherethe automobile travel is least heavy. Sec. 11. Westrumite emulsion of as-phalt mixed with stone, laid 2V2 inchesthick and rolled. Has a good surface,showing a few stones, harder andsmoother than the sections laid in 1
. Water & sewage works . 7b. Same except that chips wereinto the dry stone, gal. ofasphaltoilene aplied and chips rolledinto surface. Condition about the sameas Sec. 3. The single coat section, 7b, isthe better and is in good condition, fullyequal to Sec. 3. in about same condition in October, 1913,as No. 3, except much more wavy in thehalf of the width next the gutter, wherethe automobile travel is least heavy. Sec. 11. Westrumite emulsion of as-phalt mixed with stone, laid 2V2 inchesthick and rolled. Has a good surface,showing a few stones, harder andsmoother than the sections laid in 1911. The preceding sections run up the westside of Connecticut avenue from the dis-trict line to Bradley lane and down onthe east side. The following sections runnorth from Bradley lane on the west sideof the street railway tracks. The first experiment is with a bitumin-ous concrete laid according to the To-peka specifications between September 9and December 13, 1912. The cost was$ a square yard. In October, 1913,. ? RBPARING sand cushion for ChevyChase sample trick road. ^ In 1912 Section 8 was laid in August,9 in June, 10 in November, and 11 in De-cember. These sections were reported inFebruary, 1913, as requiring a treatmentin 1913, and probably received it. Sec. 8. Cold ugite, refined water-gastar, was applied to the surface of a water-bound macadam road; gal. first thenlimestone chips after 3 hours. In Octo-ber, 1913, none of this material was vis-ible. Sec. 9. Trinidad asphaltic oil appliedcold, as in sec. 8, gal. per sq. nearly equal to sec. 3. Sec. 10. Indian Refining Company,residual petroleum applied hot under 60pounds pressure after dust had beenswept off of macadam road. Apparently this section was in excellent condition,equal to a new asphalt pavement. The second experiment is similar, laidunder the District of Columbia specifica-tions, and is in equally good cost $ a square j-ard. Experiment 3 is of cement concrete,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsewerage, bookyear191
