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, <br /> � <br /> 1 �laximum nominal size as follows: <br /> Footings: 1_y2+� <br /> � Masonry Fill: 1/4" <br /> All other concrete: 3/4" <br /> Fine A��re�ates: ASTM C33, natural bank or river sand. <br /> ' sUVater: Drinkable. <br /> ��' , � , � Air=Entrainin� Admixture: ASTM C 260, certified by manufacturer to be compatible <br /> , <br /> with other required admixtur�s. <br /> Products: Subject to compliance with requirements, provide one of the following: <br /> ' "Sika Aer"; Sika Corp. <br /> "MB-VR or MB-AE"; Master Builders <br /> � "Darex AEA"; W.R. Grace <br /> "Edoco 2001 or 2002"; Edoco Technical Products <br /> Prohibited Admixtures: Calcium chloride thyocyanates or admixtures containing more <br /> ' than 0.1 percent ch oride ions are not permitted. <br /> ' <br /> 2-Q�pROPORTIONING AND DESIGN OF MIXES: <br /> � Prepare desit�n mixes for each type and strengfh of concrete by either laboratory trial <br /> batch or field.experience methods as specified in ACI 301. If trial batch method used, <br /> use an independent testing facility acceptable to Architect for preparing and reporting <br /> ' proposed mix designs, The testing facility shall not be the same as used for field quality <br /> control testing. <br /> , <br /> � Desi4n,Mixe,s �� p�„ie� normai weignt concrete with the following properties, as <br /> in—d a ed on drawings and schedules: <br /> 4000 psi 28-day compressive strength; W/C ratio, 0.44 maximum (non-air- <br /> � entrained), 0.35 maximum (air-entrained). <br /> Adjustment to Concrete Mixes: Mix design adjustments may be requested by Contractor <br /> � when characteristics of materials, job conditions, weather, test results, or other <br /> � <br /> CONCRETE WORK 03310 - 3 <br /> � <br /> � <br />