ITEM 408 PRIME COAT
408.01 Description. This work consists of preparing and treating an existing surface with asphalt
material, and cover aggregate if required.
408.02 Asphalt Material. Conform to the applicable requirements of 702 for asphalt material
and use one of the following types: 702.02 MC-30, MC-70, or MC-250; or 702.03 Primer 20.
408.03 Cover Aggregate . Use cover aggregate conforming to No. 9 size or gradation
408.04 Weather Limitations . Do not apply asphalt material on a wet surface. Do not apply
prime coats for asphalt concrete or surface treatment work when the atmospheric temperature is below 50 F (10 C) or when the air temperature within the preceding 24 hours has been 40 F (5 C) or lower. Do not apply prime coats on stabilized or granular base courses when the atmospheric temperature is below 40 F (5 C).
408.05 Equipment. Use equipment conforming to 407.03.
408.06 Preparation of Surface. Shape the surface to be primed to the required grade and section.
Ensure the surface is free from all ruts, corrugations, segregated material or other irregularities and is smooth and uniformly compacted at the time of application of the asphalt material. Clean the surface in a manner that will thoroughly remove all mud, earth, and other foreign material. Take care to clean the edges of road to be primed to ensure uniform application of the asphalt material directly onto the existing base or pavement surface. Remove material cleaned from the surface and dispose of it as the Engineer directs.
408.07 Application of Asphalt Material. Apply asphalt material in a uniform manner spread to
the width of the section to be primed by means of a distributor conforming to 407.03. Take care that the application of asphalt material at the junction of spreads is not in excess of the specified amount. Squeegee excess asphalt material from the surface. Correct skipped areas or deficiencies. Do not allow traffic on the prime coat until the asphalt material has been absorbed by the surface and will not be picked up. Obtain the Engineer's approval for the quantity, rate of application, temperatures and areas to be treated before application of the prime coat.
408.08 Application of Cover Aggregate. If, after applying the prime coat, the asphalt material
fails to penetrate and traffic must use the roadway, spread cover aggregate in the amount required to absorb any excess asphalt material.
408.09 Method of Measurement. The Department will measure Prime Coat by the number of
gallons (liters) according to 109. Provide weight tickets (including weigh back tickets) for every load, or partial load used, according to Supplement 1060 based on weight tickets from an Ohio Permitted Device according to provisions of Ohio Revised Code Section 1327, and Ohio Administrative Code Chapter 901:6.
408.10 Basis of Payment. The cost of cover aggregate is incidental to Prime Coat.
The Department will pay for accepted quantities, complete in place, at the contract price as follows: Item Unit Description 408 Gallon (Liter) Prime Coat
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