The process of making fly ash bricks involves mixing fly ash with water, creating a paste. This paste is then mixed with lime and gypsum, which act as binding agents. The mixture is then pressed into molds and left to cure. Curing involves keeping the bricks in a steam chamber for up to 24 hours.
When it comes to testing the quality of these bricks, compressive strength is a vital aspect. As per IS: 12894, this can be calculated using a compression testing machine