472.1 472.3
472.1DESCRIPTION —This work is the treatment of a n asphalt seal coat with an application of asphalt
material .
472.2MATERIAL —
TABLE A Fog Seal Materials Application Temperature (F) Class of Material Type of Material Minimum Maximum CSS-1h Cationic Emulsified Asphalt 70 150 SS-1h Emulsified Asphalt 70 150 SS-1hP Polymer -Modified Emulsified Asphalt 70 150 CSS-1hP Cationic Polymer -Modified Emulsified Asphalt 70 150 If required or directed, dilute emulsified materials using emulsion and water or a compatible emulsifying solution . Do not exceed dilution of less than 38 % asphalt residue. All dilution must be done by the emulsi fied asphalt supplier at the emulsi fied asphalt supplier plant location. Provide a Bill of Lading from the emulsi fied asphalt supplier certifying the base emulsified asphalt properties before dilution, the quantity of emulsified asphalt, and the water added for dilution , or certify the diluted product . Diluted emulsified asphalt must be applied within 48 hours after dilution. Dilution of asphalt emulsion in the field is not allowed .
TABLE B Fast Break Fog Seal Materials Application Temperature (F) NTT Non-Tracking Tack 140 180 CNTT Cationic Non -Tracking Tack 140 180 *Proprietary Fast Break Materials *As listed in Bulletin 15 * * • Do not dilute NTT/CNTT.
• *Proprietary Fast Break Fog Seals Materials : Conditionally approved in Bulletin 15 according to manufacturer's recommendations . Application Temperatures according to manufacturer's recommendations . If dilution is allowed according to manufacturer’s recommendations , do not exceed dilution of less than 38% asphalt residue . Dilution of asphalt emulsion in the field is not allowed .
• All Fast Break Fog Seal Materials must achieve a break/cure within 30 minutes or less.
472.3CONSTRUCTION —Place the fog seal on a n asphalt seal coat constructed as specified in Section
470, or as directed by the Representative . Allow the seal coat to cure a minimum of 2 days before fog sealing . Place the fog seal application within 2 to 30 days after the last day of the seal coat placement , unless otherwise directed in writing by the District Executive .
472.3(a) 472.4(b) 60F. Do not apply emulsified asphalt if, in the Representative's opinion, rain is imminent or if freezing temperatures are expected within 8 hours after application .