. Pacific municipalities and counties . mas a binder over roads made with abinder of road oil containing ony a per-centage of asphaltum. Thermometers placed at over 4 depthin a 6-inch asphaltic pavement showedthat the pavement maintained an averagetemperature about 16)^ above the sur-rounding sun temperature. Tests were then made of road materiasat various temperatures under actualroad conditions to determine the relativebinding value tmder impact and co>-p-e5-sion of E Grade Asphaltum.—contain-ing 100; asphaltum: L2 Grade Asphal-tum.— containing 95; asphaltum. andL3 Grade Asphaltum.—contal
. Pacific municipalities and counties . mas a binder over roads made with abinder of road oil containing ony a per-centage of asphaltum. Thermometers placed at over 4 depthin a 6-inch asphaltic pavement showedthat the pavement maintained an averagetemperature about 16)^ above the sur-rounding sun temperature. Tests were then made of road materiasat various temperatures under actualroad conditions to determine the relativebinding value tmder impact and co>-p-e5-sion of E Grade Asphaltum.—contain-ing 100; asphaltum: L2 Grade Asphal-tum.— containing 95; asphaltum. andL3 Grade Asphaltum.—contalnini 90asphaltum. Determinations were made a*temperatures of 68 100. and140F;.. the experiments being carriedout in the following manner;— Rock-dust was mixed at 300 degrees Fwith 10- by weight of each of the bindersand the resulting mixture made intobriquets 25 millimeters (.984 inches) indiameter by 25 millimeters (.984 Inches)in height. These briquets were testedunder impact and compression with thefollowing results:. Crushir q Strength in Pounds Per Square In chCalol•?L-2 Calol Grade Grade E Orade 05-r 90% TenM>pra- 100% Asphal- Asphal- ture tum liim 68 degrees F. 1357 222 209 100 degrees F. 942 153 133 140 dejrees F. 348 73 20 Irrpict—Number of Blows 63 degrees F. 13000 608 490 100 degrees F. 7800 191 164 140 degrees F. 456 47 41
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Keywords: ., bookcentury1900, bookdecade1910, bookidpacificmunicipal321918lea
