Phonphuaka et al. [10] ,study the effect of adding charcoal on mechanical and physical
properties of brick, they found that an increase in porosity result from adding charcoal which result
in decreasing in density,water absorption and compressive stress. Bánhidi [11], shows that increasing
the quantity of agricultural wastes byproducts in the claymixture significantly decreases
the thermal conductivity of the final bricks, while only a minor reduction in the mechanical
strength was observed. Okunade [12] study the effect of addition of sawdust and wood ash admixtures
to a 30:70 parts by weight laterite-clay mix, the admixtures added in various combinations
of proportions by volume(from 0 to 10%), a reduction in density (from 1755 to 1512 kg/m3)
was observed also a reduction of compressive stress was observed (~18 MPa to ~10 MPa).
In this work, new technology involves using lightweight construction materials which,
in comparison to the common used brick, have lower thermal conductivity and bulk density and
higher compressive stress values where a new method is proposed; the clay is initially mixed
with sawdust with different mass fraction in order to obtain good performance brick. The proposed
method maintains a high compressive strength, which results in high load bearing wall,
enhancement of thermal insulation properties, lower densities, lower transport costs, and higher
brick production per tones of clay.