Get a supply of clay masonry and concrete masonry units. Mix mortars of different consistencies and use them to lay up a small wall. Observe and record the ease or difficulty in using the mortar and...

Get a supply of clay masonry and concrete masonry units. Mix mortars of different consistencies and use them to lay up a small wall. Observe and record the ease or difficulty in using the mortar and maintaining the desired-size mortar joint. After the walls have cured, try to separate the masonry units. Do some seem to have greater bonding strength?