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TRANSIT MIX CONCRETE CO. <br /> Colorado Springs Pueblo <br /> P.O Bo\-1030,CO 80901 P.O Box-857,CO 81002 <br /> (719)475-0700(Far)475-0726 (719)561-8350(Fax)566.0231 <br /> CONCRETE MIX DESIGN <br /> September 22, 2017 <br /> Cripple Creek Gold Mine <br /> Victor,Colorado <br /> CDOT Class D Structural Concrete-20%Fly Ash <br /> 4500 PSI Q 28 Days•0.44 Maximum W/CM(Class 2 Sulfate)•Air Entrained <br /> LANGSTON CONCRETE <br /> P.O. Box 279 <br /> Florence, Co 81226 <br /> One Cubic Yard <br /> Cement ( GCC Type 1/II Pueblo,CO } 526 lbs <br /> Fly Ash ( Boral Class F Craig,CO } 132 lbs <br /> WRA ( Master Builders 322 N ) 19.7 ozs <br /> WRA ( Master Builders Glenium 7500 ) 19.7 ozs <br /> AEA "As Needed" ( Master Builders AE 90 ) 5.2 ozs <br /> Rock ( Grisenti No.57/67 ) 1680 lbs <br /> Sand ( Daniels Sand CO ) 1275 lbs <br /> # Water ( Colorado Springs,CO ) 266 lbs <br /> Transit Mix Concrete CO Identification Number: 64592110 <br /> Approximate Design Physical Properties: <br /> Unit Weight-pcf t142.3 <br /> Slump-Inches 3.75"± 1.0" <br /> Air Content-% 6.5%t 1.5% <br /> Water/Cement Ratio 0.40 <br /> This mix is derived from the enclosed J.H.Morgan,P.E Trial Mix Design,CDOT APL No.is lending.Compliance information on the <br /> various materials is also enclosed.Production and delivery is in accordance with ASTM C 94 Standard Specification for Ready-Mixed <br /> Concrete.ComprLssivc strength performance is conditional with strict adherence to the current ASTM Standards relating to concrete,and <br /> the latest revisions of ACl 301 And 318. <br /> Additional admixtures,colors,accelerators,stabilizers,fibers and retarders must be approved by the specifying authority and must be <br /> requested with each order as required.The approved concrete mix design has a water reducing admixture which conforms to AASHTO M <br /> 194(ASTM C 494),Type D;the 90 minute time limit can be extended to 180 minute,with approval. <br /> " This mix is batched with city water and meets ASTM C 1602 criteria 4 2"Potable Water'is permitted to be used as mixing water in <br /> concrete without testing for conformance with the requirements of ASTM C 1602 speufication. <br /> Do not use air-entrained concrete for slabs that have a hard troweled surface,this mix is not designed to accept a hard troweled finish <br /> TRANSIT MIX CONCRETE CO. <br /> Robert L. Montoya,BSC ET <br /> NRMCA Certified Concrete Technologist Level 4 <br />