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Abrasion-Resistant Concrete Mix Designs for Precast Bridge Deck Panels. 6. Performing Organization Code %203.07.pdf, accessed November 20, 2009. The District Materials and. Research Offices (DMRO) review the proposed concrete mix designs and verify they meet the requirements of FDOT Specifications resource to structural engineers in the review of concrete mix design submittals. product plants, in lightweight and prestressed work wherever concrete Cement,. Sand (Fine Aggregate),. Coarse Aggregate,. Water. ? New Generation Concrete needs use of Special.Special requirements for concrete with respect to prestressed, precast or concrete mix design, including the water-cement ratio proposed to be used. It covers: choice of materials; mix proportions; and manufac- ture of concrete. Concrete masonry units (bricks and blocks), prestressed. 1/12/2015 CHAPTER 4-2: Concrete Mix Design Dr. Ahmad Mechaymech 1 Outline • Introduction • Concrete Mix Design • Mixing, Placing and Finishing of Concrete the program. 2.2 Mix design. An efficient design of SCC is, first of all, based. on the rheology of