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<br />~ <br />r-- <br />~ <br />C'J <br /> <br />x <br /> <br />CONTENTS <br /> <br />c. <br /> <br />CHAPTER III-INTRODUCTION AND SUMMARY. <br />INVESTIGATIONS AT BERKELEY <br /> <br />GENERAL <br /> <br />St(tiOfJ <br />22 Purpose and scope of tests <br />23 Classification of cemeIlts <br /> <br />PROGRESS OF WORK <br /> <br />24 Initid program <br />25 Manufacture of cements <br />26 One-year ttsts <br /> <br />WORK OF COOPERATING AGENCIES <br /> <br />27 Southwestern Portland Cement Co. <br />28 Riverside Portland Cement Co. <br />29 California Portland Cement Co. .... <br />30 Portland Cement Association <br />31 University of California .. <br /> <br />PERTINENT DATA AND TEST PROGRAM <br /> <br />32 Period and place of investigation <br />H Ctment requirements ... <br />H Preliminary investigations <br />H Cement investigations.. . <br /> <br />VARIABLE FACTORS AND RELATION OF TESTS TO MASS CONCRETE <br /> <br />36 Hydration.a chemical reaction <br />37 Oxide composition <br />38 Compollnd composition .. <br />39 Other constituents <br />40 Effect of heat treatment <br />41 Specific surface index of nneness <br />42 Me:lsurements of specific surface <br />43 Curing conditions <br />44 Heat of hydration in mass concrete <br />4$ Prediction of heat of hydution <br />46 Heat of hydration and temperature cise <br />47 Strength <br />48 Strength-he1t ratio <br />49 Duubility, <br />50 Effects of sodium sulfate <br />.S' 1 Volume changes <br />52 Water-cement ratio <br />n Water absorption of cement <br />H Commercial portland cement <br /> <br />SUMMARY OF CONCLUSIONS <br /> <br />.S'.5 General results <br />S 6 Influence of major factors <br /> <br />1 <br /> <br />Pag~ <br />23 <br />23 <br /> <br />24 <br />24 <br />21 <br /> <br />21 <br />21 <br />21 <br />" <br />2' <br /> <br />2. <br />2. <br />30 <br />30 <br /> <br />32 <br />32 <br />32 <br />II <br />l4 <br />l4 <br />34 <br />II <br />II <br />3. <br />3. <br />31 <br />37 <br />31 <br />37 <br />l8 <br />l8 <br />l8 <br />40 <br /> <br />40 <br />40 <br />