Abstract
fine aggregate ratios of 1:3, 1:4, 1:5 and 1:6 were studied both in fresh and hardened states. Results showed that the mortar
containing bottom and fly ash attained lower strength than that of the mixture without addition of ashes. Bottom ash and
fly ash mortar specimens experienced excessive bleeding. However, based on ASTM C270, the coal ashes strength fell under the Type O mortar for mix ratio of 1:3 and 1:4. The presence of heat up to 200°C increases the compressive strength of mortar. Besides that, the use of fine aggregate restrains shrinkage of mortar bricks even with high water content. This study shows that use of coal ash wastes can be effectively utilised in mortar production.
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