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we ST 627 Sheridan Boulevard • Lakewood,CO 80214 <br /> P: 303.975.9959• F:303.975.9969 <br /> office@westest.net • www.westest.net <br /> November 26, 2019 <br /> Bi JRNCO Colorado <br /> 455 W. 115,h Avenue Unit 1 <br /> Northglenn, CO 80234 <br /> Attention: Mr. Steve Heinrich <br /> Subject: Laboratory Test Results <br /> ASTM C 1567, Potential Alkali-Silica Reactivity of Combinations of <br /> Cementitious Materials and Aggregate (Accelerated Mortar-Bar Method) <br /> ASTM & AASHTO Fine Aggregate, Lupton Meadows Pit <br /> ASTM & AASHTO Coarse Aggregate, Church McKay Pit <br /> Mountain Type I/IIN Cement <br /> Headwaters Prairie State Class F Fly Ash <br /> WesTest Project No. 673819 <br /> Gentlemen: <br /> Enclosed as Figure 1 are the results of potential alkali-silica reactivity of combinations of <br /> cementitious materials and aggregate (accelerated mortar-bar method), performed on aggregate <br /> sampled from the above-referenced sources on October 3, 2019. Figure 1 represents the test <br /> results for aggregate blended with Mountain Type I/II/V cement using 20% Headwaters Prairie <br /> State Class F fly ash as cement replacement. The aggregate was prepared and tested in general <br /> accordance with ASTM Procedures. ASTM C1567 defines the potential of an aggregate for <br /> deleterious expansion as follows: <br /> "rest Expansion Classification Potential for Deleterious ASR <br /> < 0.10% Innocuous Low <br /> > 0.10% Deleterious Potentially Deleterious <br /> Based on the test results of 0.06% expansion at 14 days in solution, 16 days after casting, the <br /> potential for deleterious alkali-silica behavior of this aggregate in concrete is considered Low. <br /> If you have any questions on the data presented, please contact us at your convenience. <br /> Sincerely, Reviewed by: <br /> WesTest F <br /> H <br /> */Jet <br /> Grace Casey, El �� 49996 ylan A. Hullinger, P.E. <br /> cc: Shawn Simmerman and Bob Schumann ss�ONAL <br /> AA A�O <br />