Waste Foundry Sand Usage for Building Material Production: A First Geopolymer Record in Material Reuse

Table 2

Production parameters of geopolymer samples including the chemical binders and the WFS (in w/w basis).

Sample number	Ratio in total amount (%)	The amount of chemical binder (NaOH or Na2SiO3) (g)	The amount of WFS (g)
1	10	125	1250
2	15	187	1250
3	20	250	1250
4	25	312	1250
5	30	375	1250