The effect of the size of grog in fire-clay bodies. . PRICE, 10 CENTS Sold only by the Superintendent of Documents, Government Printing Office,Washington, D. C. WASHINGTON GOVERNMENT PRINTING OFFICE 1918 EFFECT OF THE SIZE OF GROG IN FIRE-CLAY BODIES By F. A. Kirkpatrick CONTENTS Page I. Introduction 3 II. Literature 4 III. Methods 7 1. General plan 7 2. Preparation of grog 7 3. Preparation of bodies 8 4. Properties of raw bodies 8 5. Properties of burned bodies ? 9 IV. Results of tests upon bodies containing one size of grog 11 V. Results of tests upon bodies containing mixtures of grog sizes
The effect of the size of grog in fire-clay bodies. . PRICE, 10 CENTS Sold only by the Superintendent of Documents, Government Printing Office,Washington, D. C. WASHINGTON GOVERNMENT PRINTING OFFICE 1918 EFFECT OF THE SIZE OF GROG IN FIRE-CLAY BODIES By F. A. Kirkpatrick CONTENTS Page I. Introduction 3 II. Literature 4 III. Methods 7 1. General plan 7 2. Preparation of grog 7 3. Preparation of bodies 8 4. Properties of raw bodies 8 5. Properties of burned bodies ? 9 IV. Results of tests upon bodies containing one size of grog 11 V. Results of tests upon bodies containing mixtures of grog sizes 16 1. Properties in the raw state 16 (a) Explanation of diagrams 16 (b) Analysis of results by means of theory of voids 17 (c) Analysis of results by means of granular analysis 24 2. Results of tests upon bodies in the burned state 26 (a) Strength and porosity ...: 26 (b) Quenching tests from 6oo° C 29 (c) Quenching tests from 10000 C 31 (d) Volume shrinkage 32 VI. Summary of results 36 VII. Application of results 37 I. INTRODUCTION In
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