GENERAL
The following procedures should be used to determine and record pay quantities for prime coat and asphalt curing seal items. Prime coats are used to treat non-asphalt base courses while asphalt curing seals are typically used in conjunction with lime treated soil, cement treated base course, and soil cement base.
MEASUREMENT
The quantity of prime coat and asphalt curing seal to be paid for will be measured at the directed application temperature in gallons. The liquid asphalt should be free of air bubbles and foam at the time of measurement. Recorded measurements in gallons should be made before and after the liquid asphalt material is applied. The directed and actual application rates of gallons/square yard must also be recorded.
DEDUCTION
Articles 543-5 provides for a deduction in the measured quantity of seal material if the Contractor exceeds a directed application rate by more than 0.02 gallons / square yard.:
If the actual application rate, gallons/square yard is greater than the directed application rate plus the allowable tolerance, then a deduction in the measured gallons must be made. The following example shows how this deduction would be determined.
Example:
675 gallons of asphalt curing seal are applied to 3533.3 square yards of lime treated soil. This represents an actual application rate of 0.191 gallons/square yard. The directed rate was 0.150 gallons/square yard. Since the actual rate (0.191) is greater than the directed rate plus 0.02 (0.150 + 0.02 = 0.170), a deduction must be made:
(Actual Rate - (Directed Rate + Tolerance)) x square yards = gallons to be deducted
(0.191 - (0.150 + 0.02)) x 3533.3 =
74.2 gallons to be deducted
This quantity should be recorded with a minus sign in the appropriate pay record book. Calculations to determine deductions should be placed directly in the pay record book adjacent to the original measurements and computations for each application of asphalt curing seal.
