The mortar can be cement-sand, lime-sand or combination mortars. The strength of the mortar should be weaker than the strength of the blocks to avoid formation of cracks. Cement sand mortars of 1 : 4 to 1 : 6 and corresponding lime or combination mortars could be used.
The blocks may be slightly wetted/moistened before construction to prevent absorption of water from the mortar and also to ensure proper adhesion with the mortar. The masonry should be constructed to a suitable bond so that the vertical joints in successive layers are staggered. The work shall be cured appropriately for due period of time. Scaffolding shall be single or double depending on the importance of the work.
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