15A NCAC 02D .0931 CUTBACK ASPHALT

(a) For the purpose of this Rule, the following definitions apply:

(1) "Asphalt" means a dark‑brown to black cementitious material, solid, semisolid, or liquid in consistency, in which the predominating constituents are bitumens that occur in nature as such or that are obtained as residue in refining petroleum.

(2) "Cutback asphalt" means asphalt cement that has been liquefied by blending with petroleum solvents or diluents. Upon exposure to atmospheric conditions, the diluents evaporate, leaving the asphalt cement to perform its function.

(3) "Penetrating prime coat" means an application of low‑viscosity liquid asphalt to an absorbent surface. It is used to prepare an untreated base for an asphalt surface. The prime penetrates the base and plugs the voids, hardens the top, and helps bind it to the overlying asphalt course. It also reduces the necessity of maintaining an untreated base course prior to placing the asphalt pavement.

(b) This Rule applies to the manufacture and use of cutback asphalts for the purpose of paving or maintaining roads, highways, streets, parking lots, driveways, curbs, sidewalks, airfields, such as runways, taxiways, and parking aprons, recreational facilities, such as tennis courts, playgrounds, and trails, and other similar structures.

(1) long-life, of one month or more, stockpile storage is necessary;

(2) the use or application at ambient temperatures less than 50°F, as measured at the nearest National Weather Service Field Local Office or Federal Aviation Administration Surface Weather Observation Station, is necessary;

(3) the cutback asphalt is to be used solely as a penetrating prime coat; or

(4) the user can demonstrate to the Director that there are no volatile organic compound emissions under conditions of normal use.

History Note: Authority G.S. 143‑215.3(a)(1); 143‑215.107(a)(5);

Eff. July 1, 1979;

Amended Eff. December 1, 1989; January 1, 1985; June 1, 1980;

Readopted Eff. November 1, 2020.