I.S. 27:1950

PART I GYPSUM PLASTERS
PART II SPECIFICATION
1 SCOPE
2 DEFINITIONS
3 CLASSES
4 CHEMICAL COMPOSITION
5 LOSS OF WEIGHT ON IGNITION
6 CONTENT OF COARSE PARTICLES
7 SETTING TIME
8 SOUNDNESS
9 MECHANICAL RESISTANCE
10 TRANSVERSE STRENGTH
11 MARKING
12 TESTING
13 SAMPLING AND SIZE OF SAMPLES
14 TESTING CONDITIONS
APPENDIX A DETERMINATION OF SULPHURIC ANHYDRIDE AND OF
           CALCIUM OXIDE
APPENDIX B DETERMINATION OF SOLUBLE SODIUM AND MAGNESIUM
           SALTS
APPENDIX C DETERMINATION OF LOSS OF WEIGHT ON IGNITION
APPENDIX D METHOD FOR THE DETERMINATION OF THE CONTENT OF
           COARSE PARTICLES
APPENDIX E STABILISING OF SAMPLES FOR TESTING
APPENDIX F DETERMINATION OF NORMAL CONSISTENCY
APPENDIX G DETERMINATION OF SETTING TIME
APPENDIX H DETERMINATION OF SOUNDNESS
APPENDIX K DETERMINATION OF MECHANICAL RESISTANCE
APPENDIX L DETERMINATION OF TRANSVERSE STRENGTH

Applies to gypsum plasters, suitable for use in building operations and in the manufacture of building materials, which set due to the hydration of calcium sulphate.