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E. Supplementary Cementitious Materials(SCM): <br /> 1. Concrete mix shall contain SCM in the amounts specified unless other amounts are approved by SER. <br /> a. Either fly ash or ground granulated blast furnace slag(GGBFS)may be used for the SCM but shall not <br /> be used together to form a ternary mix.Use of fly ash or GGBFS in the concrete mix is mandatory. <br /> 2. Fly Ash: Substitute fly ash for Portland cement at a maximum of 15%of the total cementitious content. <br /> a. If used to mitigate potential aggregate reactivity,only Type F fly ash may be used and shall have the <br /> following maximum properties:1.5%available alkali and 8.0%CaO. <br /> F. Water/Cementitious Materials Ratio: Interior Floor Slabs:0.45 maximum. <br /> G. Air-Entraining Admixture:Do not air entrain interior floor slabs with troweled finish. <br /> H. Time of Setting: Initial setting time shall not exceed 400 minutes as determined by ASTM C 403 for a laboratory <br /> sample representing the submitted mix design,admixture dosages,and concrete temperature of 607±5°F.Only <br /> one specimen or time of setting test is required per sample. If more than one test is performed per sample, <br /> report average times of initial setting. Test shall be performed by an independent testing agency selected by, <br /> and as a responsibility of,the r9AGFete Suppli^-M. Any testing agency should be the responsibility of the <br /> owner. Testing by the supplier sets up the potential for non-conformity without consequences. <br /> I. Slump:Slump at the point of placement shall not exceed 4%+/-1-inch subject to the requirement that concrete <br /> shall be of a consistency to be worked readily into forms and around reinforcement without segregation,voids, <br /> or excessive bleeding.Maximum slump variance shall be 1-inch. <br /> J. Admixtures: <br /> 1. Mid Range Water-reducing admixture may be added to improve workability for a minimal water content. <br /> 2. High Range Water Reducers are not allowed on interior slabs. <br /> 3. Use admixtures in accordance with manufacturer's recommendation. <br /> 4. Calcium Chloride Admixture: <br /> a. Calcium chloride(Type L)conforming to ASTM D 98 may be used in solution form as part of the mixing <br /> water to accelerate concrete setting and early-strength development. <br /> 3.7 CURING MATERIALS <br /> A. Evaporation Reducer: Liquid thin-film-forming compound that reduces rapid moisture loss caused by high <br /> temperature,low humidity,and high winds;intended for application immediately after concrete placement. <br /> 1. Exterior Concrete Curing Products: <br /> a. Euco-Bar,by Euclid <br /> b. Confilm,by BASF Admixtures(Master Builders) <br /> c. Aquafilm,by Dayton Superior. <br /> B. Penetrating Film Forming Dissipating curing that reduces rapid moisture loss caused by high temperature,low <br /> humidity,and high winds. Intended for application immediately after concrete placement. <br /> 1. Interior Concrete Curing Product: <br /> a. Skudo Cure by Skudo Manufacturing Corp. Contact 1-888-758-3611 for distribution. <br /> b. Substitutions by Approval Only <br /> 3.8 CONCRETE MIX DESIGN <br /> A. Proportioning Normal Weight Concrete: Comply with ACI 211.1 recommendations. <br /> 1. Replace up to 15%of the Portland cement with fly ash,ground granulated blast furnace slag,silica <br /> fume,or rice hull ash as is consistent with ACI recommendations. <br /> B. Proportioning Structural Lightweight Concrete: Comply with ACI 211.2 recommendations. <br /> 1. Replace as much Portland cement as possible with fly ash,ground granulated blast furnace slag,silica <br /> fume,or rice hull ash as is consistent with ACI recommendations. <br /> 2-26-18 <br /> 033000-5 <br />