Construction of AAC block masonary

I request to provide the quantities of Cement and Sand required to complete 1 cum of AAC Block masonary(Block size is 200mmx200mmx600 mm) in 1:6 Cement mortar ratio.

Further,some suppliers provide readymix adhesive alongwith the Blocks ,which is made up of cement,sand and a ppolymer(Factory made),which is comparatively better ,Conventional cement mortar

OR Factory made adhesive.Which would be more economical,as the joint thickness in the traditional blockwork is assummed to be 10mm whereas in case of Ready adhesive it is thin joint work with 2 mm