Tests on clay materials available in Illinois coal mines . ?u STATE OF ILLINOIS STATE GEOLOGICAL SURVEY FRANK W. DEWOLF. Director Cooperative Goal Mining Series BULLETIN 18 ^C!G SURVFY 5 -Mm 281984 TESTS ON CLAY MATERIALS AVAILABLE IN ILLINOIS GOAL MINES R. T. STULL and R. K. HURSHCeramics Department, University of Illinois ILLINOIS COAL MINING IN V KSTICJ ATIONS Prepared under a cooperative agreement between the Illinois State Geological Survey, the Engineering Experiment Station of the University of Illinois, and the U. S. Bureau of PRINTED BY AUTHORITY OF THE STATE OF ILLINOI
Tests on clay materials available in Illinois coal mines . ?u STATE OF ILLINOIS STATE GEOLOGICAL SURVEY FRANK W. DEWOLF. Director Cooperative Goal Mining Series BULLETIN 18 ^C!G SURVFY 5 -Mm 281984 TESTS ON CLAY MATERIALS AVAILABLE IN ILLINOIS GOAL MINES R. T. STULL and R. K. HURSHCeramics Department, University of Illinois ILLINOIS COAL MINING IN V KSTICJ ATIONS Prepared under a cooperative agreement between the Illinois State Geological Survey, the Engineering Experiment Station of the University of Illinois, and the U. S. Bureau of PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS riLLINOIS STATE GEOLOGICAL SURVEY UNIVERSITY OE ILLINOIS URBANA 1917 Mjm CONTENTS PAGE Introduction 9 General considerations 10 Cost of plant 10 Importance of systematic field examination 10 Importance of laboratory tests 11 Characteristics of clays for various products 11 Common brick 11 Front brick or pavers 12 Hollow ware and fireproofing 12 Behavior of clays during burning 12 General discussion 12 Importance of long heat range 15 Defects in burned ware 16 Surface pitting 16 Scumming due to calcium sulphate in clay 16 Bloating due to overfiring 16 Tests on samples in Group 1 18 Process employed 18 Preparation of samples 18 Slaking tests 18 Molding the briquets 19 Oxidation tests 19 Tempering water 22 Linear drying shrinkage 22 Volume shrinkage 22 Burning 22 Burning Shrinkage 23 Porosity 23 Tests on samples in Group II 24 Grinding 25 Molding 25 Screening 26 Burning 26 Results of tests 26 Illinois roof shales and floor clays 30 Results oftestsonclaymater18stul
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcoalmin, bookyear1917
