All materials proposed for use in concrete and all concrete mix designs shall be approved by the Kansas City Metro Materials Board prior to use. Such materials include coarse and fine aggregates, cementitious materials, admixtures and water. All materials shall be SAMPLED and TESTED after October 1st of the previous year.

Concrete mix design submittals shall include:

• Completed Mix Design Sheet / Checklist. (The mix design sheet shall be submitted as part of the PDF andAND as an Excel sheet.)
• Completed checklist. If multiple mix designs are submitted using the same materials only one checklist is required.
  
• Mix designation (Including 4K, 5K, or HE in the designation).
• Contact information.
• 28 day compressive strength tests.
• Design slump and allowable range afterAFTER addition of all admixtures.
• Proportions / weights of all mix materials.
• Source of all mix materials.
• Design water to cement ratio. Mix designs shall be submitted for each combination of materials, differing material proportions or differing water to cement ratios.
• Design unit weight at the design air content.
• Proportion of admixtures (Admixtures for water reduction, set acceleration, set retardation, or viscosity modifiers may be shown as optional provided they are Kansas Department of Transportation approved and the mix design shows the allowable application rates or dosages for each optional admixture.)
• Admixtures submittals shall include documentation from the manufacturer which provides addition rates. If addition rates for admixtures do not fall within the manufacturers recommended dosage rate a letter giving the reason shall be provided. Individual members reserve the right to reject mixes with admixtures exceeding the manufacturers recommended dosage rates.
• Gradation designation for the coarse aggregate.
• Test results, performed by a qualified laboratory, that meet current KCMMB coarse aggregate specifications.
• Test results, performed by a qualified laboratory, for coarse and fine aggregate gradations.
• Test results, performed by a qualified laboratory, that meet current KCMMB specifications listed above for fine aggregate. Consider sand sources the same, provided they are not more than 25 miles apart on the same river and no tributaries enter the river between the 2 points.
• An ASTM C595 certification from the cement supplier, if using a pre-manufactured Type IP (IP) or (IS) cement.
• The ready mix supplier shall provide an ASTM C150 certification, ASTM C989 certification (slag) or ASTM C618 certification (fly ash), and testing results for ASTM C 1567 Mortar Bar Expansion if required. Expansion shall be a maximum of 0.10% at 16 days.
• Test results performed by a qualified laboratory for a minimum of three concrete compression tests that meet requirements of chapter 5 of ACI 318 for the strength required. Compressive tests are required for each mix design submitted. However, if mix designs differ only in water to cement ratios, one set of three compressive tests shall be required for only the highest water to cement ratio. (Note: One compressive test equals the average strength of two cylinders made from the same sample of concrete and tested at 28 days.) Compressive test taken before 28 days are acceptable if they meet all requirements. Each concrete compression test must be sampled from separate batches.

In addition to the mix design, a Maturity Curve shall be submitted for any high early strength concrete mixes. The curve will be posted on the KCMMB web site (Private Side). The curve shall be developed in accordance with ASTM C1074: "Practice for Estimating Concrete Strength by the Maturity Method". The submittal for the Maturity Curve shall include the following:

• Test results from all tests required by ASTM C 1074.
• Table of times, cylinder breaks at the times stated, temperature of the concrete at the times stated, and the Time Temperature Factor for the times stated.
• A graph showing the Compressive Strength of the concrete in psi on the vertical axis and the log of the Time Temperature Factor on the horizontal axis, with the data plotted on the graph and a best fit line drawn through the data points.

All mix design information shall be submitted every KCMMB year (March 1st through the last day of February).