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<br />~ <br /> <br />," <br /> <br />~ <br />N <br /> <br />e <br /> <br />XIV <br /> <br />CONTENTS <br /> <br />CHAPTER VI-MATERIALS, EQUIPMENT, AND PRO- <br />CEDURES FOR STRENGTH AND ELASTICITY TESTS <br /> <br />Sectton <br />165 Selection of equipment and methods_ _ u u_u__n_ _____n un___ <br />166 Laboratory__________________________________________________ <br /> <br />REQUIREMENTS AND LABORATORY <br /> <br />Page <br />189 <br />189 <br /> <br />MATERIALS <br />167 Arizonaaggregate______________________________________~_____ 191 <br />168 Brett aggregate_____hh_hh hh hh _ h___h _ h hh h____hh 195 <br />169 Cement_ _ _ ___ h__h h _ _ __hh _ _ h h h _ _ h_ _ hhh __ _ _ U _ hh 195 <br />170 VVater_______________________________________________________ 198 <br />171 Mix proportions__ _ __ __ ___ __ _______ _ _ ____ __ _ _______ __ ____ _____ 198 <br />172 Specimens___________________________________________________ 198 <br /> <br />EQUIPMENT <br />173 Storage facilitiesn______n_ __ _ _ _ _ __ __ n_ __ _ u__ _ n_ __ _ _ __ __ _n 200 <br />174 Rolling, equipmentn__ _ _ n_ __ _ un -,-7 __ _ _ _...,.,_ _ ___ __ _ u_ __ _ _ __ _ 200 <br />175 Scales___h_ _ _ __ _ _ U U _ _ __u _ U _ _ _u _ _~U_ _______ ___ _ U_ h U _ 200 <br />~76 Hoppers, pans, and other equipmenL__________n_______n______ 200 <br />177 Concrete mixer ___ _ __ _ _ __ ____ _ _ ___ _______ ___ _ _ __ _ __ __ _ _ __ _ _ __ _ 201 <br />178 Screens______________________________________________________ 201 <br />179 Molds and inserts____________________________________________ 204 <br />180 Curing raoms_____h____n__nn_n___nnn_h_n_n_n_n__ 207 <br />181 Capping equipmenL_nnnn_______n_~_n__n_______n__n__ 210 <br />182 Testing machinesn__nn____n______n_nn_________n_______ 210 <br />183 Other equipment_ _ ______ ___________ _____n___n______n__..___ 212 <br /> <br />PROCEDURES <br />184 Preparing molde___u_____ U _ _ _ _ U U _ U h__h_U_h__ h___UU 213 <br />185 Preparing materials___ _ __ ______ __________ ___ ___ ____ __ _______n 213 <br />186 Botching_ _ h_ U __ __u U h_ h_ _ _ hU h__ h____ U h_ ___U_hh 213 <br />187 hlixing______________________________________________________ 213 <br />188 Casting_____________________________________________________ 214 <br />189 Curing_ h hU __ ___ _ U U_ ___ h _ __ __ ___ U_ hh_U _ _h _h_ hh _ 215 <br />190 Capping_____________________________________________________ 215 <br />191 Strength testing_ __ U U h__hh_ ___ _h_Uh nhnh___hh_ _h 216 <br /> <br />ELASTICITY APPARATUS <br /> <br />192 Compressometers for small cylindersu~_________n_n__n_______ 216 <br />193 Extensometers for small cylindersnn_ _nh_h_nn__n__hh___ 218 <br />194 Compressometers for large cylinders___________nn_n__________ 221 <br />195 Extensometers for large cylindersnnn__n__~____________n__u 221 <br /> <br />ELASTtCITY PROCEDURE <br />196 Calibration_ _ _ _ h_ __h h_ _ U _ __ h_ U _ h_ U _ _ __ h_ h_ _U__h_ _ 225 <br />197 Small cylinders_n_n___~____n_n_n__________n_____________ 225 <br />198 Large cylindersn____n___uu__________n___n_____n_n_____ 226 <br />199 Calculatious_ _ _ h___ h_h_ hh _h _h_h __ _ hh_h__ h_ ___hh 226 <br /> <br />ACCURACY OF TEST RESULTS <br /> <br />200 Measures of uniformity________________________________________ 229 <br />201 Accuracy of results_ __u_nn__n__n____n_u____-n__________ 230 <br />