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<br />'<::" <br />go <br />an <br />~ <br /> <br />c: <br /> <br />CONTENTS <br /> <br />Section <br />216 Reversal of storage conditions, expansion <br />217 Neat cement and mortar ............. <br />218 MorUr and concrete .. ............ <br />219 Effect of vibratory compaction <br />220 Sealed mortar specimens <br /> <br />WATER ABSORPTION OF CEMENTS <br /> <br />221 <br />222 <br />22l <br /> <br />Scope of tests <br />Test results <br />Absorption and <br /> <br />heat of hydration <br /> <br />CHAPTER VI-INTRODUCTION AND SUMMARY, <br />DENVER INVESTIGATIONS <br />INTRODUCTION <br /> <br />224 Purpose and scope of tests <br />22J Laboratories <br />226 dassincation of cements <br />227 Laboratory personnel <br /> <br />SUMMARY OF FINDINGS <br /> <br />228 <br />22. <br />230 <br />231 <br />232 <br />23) <br />234 <br />2" <br />236 <br />237 <br /> <br />Dennition of terms <br />Cement properties and compressive strength <br />Heat of hydration <br />Strength-heat ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br />Modulus of elasticity and Poisson's ratio . . . . . . . . . . . . . <br />Durability ............. <br />Volume change <br />Plastic flow <br />Physical properties and fineness <br />Flexure tests.. <br /> <br />CHAPTER VII-MATERIALS, APP ARA TUS, AND <br />METHODS OF TESTS, DENVER INVESTIGATIONS <br />APPARATUS AND EQUIPMENT FOR COMPRESSIVE STRENGTH TESTS <br /> <br />238 Special equipment . . .. . . . . . . . <br />239 Machines for testing compressive strength ............. <br />240 Scales ..................,..".,. <br />241 Concrete mixer . . . . . . . .. . . . . . . . . . <br />242 Tank for mixing water . . . . . . . . . . . . . . . . . . . <br />243 Molds and base plates for fabrication of cylinders <br />244 Containers for specimens <br /> <br />GRADING OF AGGREGATES AND MIX DATA FOR ALL TESTS <br /> <br />245 <br />246 <br />247 <br />248 <br />249 <br />"0 <br /> <br />General <br />Grading for full mass mix, 9-inch maximum.size aggregate <br />Grading for 17S:.inch maximum-size aggregate <br />Grading for ,y,j.inch maximum-size aggregate <br />Grading for sand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br />Water-cement ratios used for specimens . .. .. ... . <br /> <br />XV <br /> <br />PJlgt <br />220 <br />221 <br />22) <br />22> <br />226 <br /> <br />226 <br />227 <br />228 <br /> <br />245 <br />245 <br />248 <br />248 <br /> <br />248 <br />249 <br />251 <br />252 <br />2>) <br />2>4 <br />2S4 <br />255 <br />2>6 <br />2>7 <br /> <br />2>, <br />2>. <br />262 <br />262 <br />262 <br />261 <br />264 <br /> <br />265 <br />266 <br />267 <br />267 <br />267 <br />268 <br />