The asphaltic cement shall be prepared solely from materials of the character described in section 17-90, so as to produce a cementitious material, which must comply in all respects with the following practical and established tests:
(1) The asphalt cements as used must have a ductility of not less than 40 centimeters at 77 degrees Fahrenheit, according to the District of Columbia standard. Its specific gravity shall be not less than 1.04 at 77, degrees Fahrenheit.
(2) The asphalt cement must not contain more than 1 percents of paraffin scale, as determined by the Holde Method.
(3) A number 2 needle, weighted 100 grams, shall penetrate in 5 seconds at 77 degrees Fahrenheit, a distance of 35 to 60 on a Dow machine.