Abstract
Wood waste ashes from a thermal biomass heating plant were used as a supplementary cementitious material in partial substitution of ordinary Portland cement. The ashes undergone a chemical analysis with respect to their heavy metal content. They exhibited values below the required legislation limits and could be used for the tests. Mechanical and durability tests were carried out on mortars specimens with the addition of wood waste ashes to ordinary Portland cement (OPC) in percentages of 5, 15, and 30%. The strength properties of mortar mixtures increased with age due to pozzolanic actions. This was observed with the 5–15% WWA addition. The OPC reference blend with 5% WWA in substitution of cement exhibited the best data and a satisfactory durability. The values obtained were similar or below the required limits for the resistance as compared to the mortars prepared with the reference Portland cement.
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