Ellis County Public Works is requesting proposals to produce cold mix asphalt materials for the 2025 asphalt program. A minimum of 8,000 tons and a maximum of 12,000 tons, with the tonnage amount to be determined later is required for bidding purposes. Base bid shall be for contractor to supply aggregates (½” chips, ¼” screenings and sand) and mixing for the cold mix with Ellis County separately contracting asphalt oil (emulsion). All asphalt mixing shall conform to the Requirements of Division 600 of the Standards and Specifications for State Road and Bridge Construction and Kansas Department of Transportation, with special attention given to temperatures. The maximum temperature of the finished product from the discharge chute shall be no more than 185 to 200 degrees Fahrenheit for the use of CMS-1 emulsion asphalt. The workability of the finished product must be maintained, and stockpile workability and longevity must be maintained. All produced asphalt will ultimately be bladed on Ellis County roads by county forces. Weight of the total mix shall be based on the mixing plant aggregate totalizer, or a calculated weight obtained from scales provided by the contractor. Fiscal Year 2025 mix components are 15% ½” chips, 65% ½” sand, and 20% ¼” screenings, with an estimated 5.8-6.25% emulsion. A second mix component may be considered with 60% sand, and 40% Quartzite screenings with an estimated 6.8% to 7.0% emulsion. Final gradations and mixed quantities will be provided prior to notice to proceed. (Only CMS-1 emulsion asphalt shall be considered for the asphalt mix design). Mix design is subject to change due to aggregate availability.
