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7-74-04; 17:40 ;LeSte� BUlldln� ;3203955376 � 18/ 28 <br /> Article Requeat Page Page 16 of 26 <br /> 40 QO <br /> N, ' <br /> C <br /> w Cylfnder Consolidatlon • <br /> a <br /> .-�-- 16 mm Dia.Rod <br /> L 3000 —a— 9.5 mm Dfa. Rod <br /> � <br /> � <br /> L � Vibration � <br /> � . <br /> m <br /> N 2000 , . <br /> �, • <br /> m �. <br /> a <br /> E <br /> U 1000 <br /> m <br /> � <br /> � <br /> m <br /> �' p <br /> 0.0 0.2 0.4 0.6 0.8 <br /> WaterlCemerit Ratio <br /> Figure 15. Average compressive strength of nortnally hydrated concrete specimens as a function of <br /> water/cement ratio and cylinde�r consolidation method.The dashed line is a plot of the equation: <br /> Comp.Strength=-92487(W/C)3+92606(W/C)2— 16452(W/C).'This equation was obtained from <br /> a linear re�ression of values obtained from the rodded specimens. <br /> Concrete Bulk Density <br /> Bulk densities determined for the normaUy hydrated concrete specimens varied significantly with <br /> water/cement ratio(figure 1�.Bulk density of in-situ hydrated con�rete cores varied only slightly <br /> from footing to footing and averaged 2.23 Mg/m3 (139 lbm/ft3). <br /> 2.3 . 144 <br /> . . . � . . . . . . � � ���� <br /> � <br /> 2.2 �� '�' • . .� � 137 <br /> . � ' , � <br /> � i <br /> I <br /> � 2.1 � '�► .. . . 131 s' <br /> �, . . ::+ ,� �,. �' <br /> N � N <br /> $ 2.0 ' ♦• , . .. 125 � <br /> Y � � `.1 <br /> � � . f ♦ � <br /> 1.9 � � 119 <br /> 1.8 112 <br /> 0.2 0.3 0.4 0.5 0.6 0.7 <br /> Water/Cement R�tio <br /> http://asae.frymulti.com/request2.asp?JID=S&AID=14082&CID=1m/1003&v=&i=&T=1 6/4/2004 <br />