The brick production process in itself has remained unchanged for a very long time: a shapeable mass is formed into a brick, assumed to be a small, regularly shaped unit that a bricklayer can grasp with one hand while picking up mortar with the other. A typical modern production process is shown in Fig. 9.1.

Additions to the brick feed can take place either at the beginning of the process or in later steps.

In the trial runs explained later, biomass ashes were introduced as a substitution displacing quarried raw materials. They were mixed with the other raw materials right at the beginning of the process.

Quarried raw materials Body fuels

La La ih

Packaging

Transport to final point of use

Fig. 9.1 Brick manufacturing process