This standard prescribes the methods of test for sulphur-type chemical resistant mortars. It provides standard procedures for determining key mechanical and physical properties such as tensile strength, compressive strength, flexural strength, and moisture absorption, ensuring the mortar can withstand aggressive industrial and chemical environments.
Methods of test for chemical resistant mortars, Part II: Sulphur type
Quick Reference Values
test conditioning temperature27 ± 2°C
test conditioning humidity65 ± 5%
compressive test specimen size50 mm cubes
melting temperature limitNot to exceed 160°C (to prevent thickening)
loading rate compression14 N/mm²/min
Key Formulas
Compressive Strength = P / A (where P is maximum load, A is cross-sectional area)
Flexural Strength = 3PL / (2bd²) (where P is load, L is span, b is width, d is depth)
Practical Notes
Sulphur mortars must be heated carefully and evenly; overheating causes the sulphur to become highly viscous and difficult to pour, while underheating results in incomplete mixing.
Ensure moulds are pre-heated slightly to prevent sudden thermal shock and premature setting of the poured sulphur mortar.
Moisture must be completely avoided during the melting process to prevent the formation of steam pockets and weak joints.