Mix design of geopolymer brick using weathering granite or other waste materials and slag.
The answer depends on the chemistry of the granite powder and slag, mainly the silica and alumina contents. The following paper would be beneficial, even though it discusses the use of Class F fly ash:
Wallah, S.E. and Rangan, B.V. (2006). Low-Calcium fly ash-based geopolymer concrete: Long-term properties. Curtin University of Technology.
Generally, the strength depends on the lot of factors including the Si/Al atomic ratio. Calcium content of the mixture. The alkali content of the mixture as well as soluble silica (released from precursors). The following articles might be helpful.
Si/Al ratio:
http://www.sciencedirect.com/science/article/pii/S0927775705004966
Ca content:
https://link.springer.com/article/10.1007/s10853-006-0532-7
Bests,
Thank dear Hassan Rashidian-Dezfouli.
Regards.
Dassekpo.
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