Transit-mix concrete may be used for the construction of the base course
in two-course concrete work. Transit-mix topping will not be allowed for the
top course in two-course work. Transit-mix concrete shall conform to all applicable
specifications of "Concrete for Sidewalks, Curbs and Gutters," particularly
in regard to materials, placing, finishing, curing, protection and intent.
A properly designed mix that will develop such concrete, using not more than
51/2 gallons of water per ninety-four-pound sack of cement, including the
free moisture in the aggregate, and with a slump of two inches, plus or minus
one inch, will be approved.