Answer by Atul Bhutani:
CLC Blocks conserves environment far more than AAC blocks. AAC blocks needs steam for getting cured whereas CLC blocks cures naturally, they are made by using Zero energy, only energy running for a mixture machine is used. The AAC block is made by a FAUX method, its made by using chemical reaction of Cement & Alunminium Powder whereas CLC blocks are made by using foam which is the original technique of making light weight blocks. Its consume more Fly Ash than AAC blocks, Flyash is again industrial waste & the core objective for inventing these blocks was to use these waste products is constructive way.
One can try a test, Put mortar on AAC block & CLC block, you will notice that water from mortar on AAC Blocks is absorbed in blocks very quickly in compare to CLC blocks & it is a fact that water is needed for gaining proper strength in mortar.
Put a nail in AAC Block & CLC Block, hang weights to this nail CLC blocks will hold far more weight than AAC blocks.
These ways one can easily decide which blocks are better to use.