"Mortar soil should have approximately 30-35% clay with the remainder being silt and sand. You are aiming for a well graded material with a range of particle size from clay to silt and sand. The maximum sized particle should not exceed 10mm. Remember the smaller the largest particles, the easier it is to obtain a smooth finish, so it is often desirable to screen the mortar soil to remove any large stones. The mortar soil should not include any organic material such as topsoil, roots or leaves."
http://www.makeitmudbricks.com.au/mortar.html#Anchor
Wednesday, May 5, 2010
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