§ 11-128. Prime and tack coats.

The materials and workmanship for primes and tack coats shall be AHTD Standard Specification requirements for prime and tack coats, with emphasis on the following items:

(1)

The prime coat shall be a medium curing cut back or an asphalt penetrating prime. The tack coat shall be a rapid curing cut back or an emulsified asphalt. The type and application rate of each shall be determined by the engineer.

(2)

Care shall be taken to clean the surface to be tacked or primed of dust, dirt and loose or foreign materials prior to the application.

(3)

Prime coats shall not be placed when the surface temperature is below fifty (50) degrees Fahrenheit; nor shall it be applied to a surface having an excess of moisture, nor when the general weather conditions, in the opinion of the engineer, are not suitable.

(4)

If the prime coat becomes damaged before the surface course is placed, it shall be repaired at the contractor's expense.

(5)

The surface of all structures, such as curbs and bridge rails, shall be protected from the prime or tack coat.

(6)

If traffic is to use the prime coat before the surface is placed, it shall be covered with a blotter course consisting of clean sandy material or commercially processed sand or sand-size screenings.

(7)

Excess material shall be removed and then blotted.

(Ord. No. 91-9, Art. 1, § 4.09, 4-11-91; Ord. No. 99-32, Art. 1, 7-8-99)