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<br />U": <br />c: <br />e&> <br />C'J <br /> <br />c::. <br /> <br />CONTENTS <br /> <br />x <br /> <br />BRIEF DESCRIPTION OF PROCEDURE <br /> <br />8ection <br />18 Preparation of molds:"_n_ n_ _ __ _ _ __ _ _ _ _ __ _ _u _ _ _ _ __ ___________ <br />19 Preparation of materialSn_ n_ __ _ _ __ _ _ __ _ __ __ ___ _ _ _n _ __ n_____ <br />20 Batching____________________________________________________ <br />21 1!ixing________________._______________________________------ <br /> <br />22 Casting_______ _ _ __ ____ ____ _ _ _ _ ___ __ _ _ ___ _ _ __ _ _ __ _ ___ __ _ ___ ___ <br />23 Curing________________________________________________-----_ <br />24 Capping_______________________________________________-----_ <br />25 Elasticity test procedure___n _ _ _ _ _ _ _ _ __ ___ - _____ _ _ __ __ __ - _ - - u_ <br />26 Compressive strength test procedure____n_n___n_____nn_n__ <br /> <br />TEST RESULTS <br />27 Series I, II, and IIL____________________n_h_______n_n_____ <br />28 Tabulated resultsn_ _n __ _ ___n _ _ n_ _ n_ _ __ _ __n_____ __ - - __h_ <br />29 Accuracy_______________________________________________----- <br /> <br />EFFECT OF SIZE OF TEST SPECIMEN, SERIES I, n. AND tII <br /> <br />30 The effect of size of test specimen on compressive strength_un___ <br />31 Effect of size of test specimen on modulus of elasticity and Poisson's' <br />ratio_________________________________________________----- <br /> <br />EFFECT OF WET SCREENING. SERIES I AND II <br /> <br />32 Effect of wet screening on mix proportions___n_n____nn_n_n_ <br />33 Effect of wet screening on concrete properties _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - - _ <br />34 Effect of wet screening on strength_unnu____nn____u_n_u_ <br />35 Strength ratio of mass-concrete test specimens to wet-Bcreened test <br />specimens________________~____________________________----_ <br />36 Effect of wet screening on modulus of elasticity and Poisson's ratio__ <br /> <br />EFFECT. OF MAxtMUM StZE OF AGGREGATE. SERIES n <br /> <br />87 Effect of maximum size of aggregate on mix proportions____n_n__ <br />38 Effect of maximum size of aggregate on concrete properties - - - - - - -_ <br />39 Effect of maximum size of aggregate on strength___nn__uu_n__ <br />40 Strength efficiency of cem:ent_n_~n___unn___n_u___nn____ <br />41 Effect of maximum size of aggregate on the modulus of elasticity and <br />Poisson's ration_uu n__ __ n _ _ __ _ n_ _ _ _ _ __ _ _ _ _ u _n _ u _____ <br /> <br />OTHER RELATIONS OF PROPERTIES <br /> <br />42 Effect of cement contenLn____u_ ___n_nn___u____nnn___ <br />43 Effect of gravel-sand ratio______________________________.._____n__ <br />44 Effect of age and water-cement ratio on modulus of elasticity_ -~~-_ <br />45 Relation between strength and modulus of elasticitY__nnnnn__ <br />46 Poisson's ratio_un__ _n_u_y__u______n________n_n__nn__ <br /> <br />EFFECT OF MASS CURING <br /> <br />47 Effect of mass curing on compressive strengthn_un_n_n_n_n_ <br />48 Effect of placing temperature on the strength of mass-cured concrete_ <br />49 Effect of temperature on the slumpnu__un__nu__nn__nu_ <br />50 Effect of mass curing on elastic properties of concrete _ _ - - - - - - - - - -- <br /> <br />CONCLUSIONS <br /> <br />51 Conclusions regarding strength and el88tic properties of concrete____ <br /> <br /> 1 <br /> I <br />Paoe <br />21 <br />21 <br />21 <br />22 <br />22 <br />22 <br />22 <br />23 <br />25 <br />25 <br />27 <br />27 <br />33 <br />36 <br />38 <br />38 <br />38 <br />43 <br />43 <br />45 <br />47 <br />47 <br />51 <br />52 <br />53 <br />53 <br />56 <br />56 <br />57 <br />58 <br />58 <br />58 <br />58 <br />64 <br />