engleski

Transformation of wood ash waste into construction materials

This work investigates partial replacement of cement with fly ash waste generated by burning forest residues and waste wood from the timber industry. The ash has minerals complementary to Portland cement with a relatively high amount of free CaO and MgO that might exert significant expansion. The ash exhibits hydraulic and pozzolanic activity that initially increases and subsequently decreases the amount of portlandite in the hydrated material. With ash addition the rate of hydration, strength and workability are decreased. Optimum dosage showed 15 % of ash, where it replaces 5 % of cement and 3.33 % of sand, which can still produce a structural grade cementitious material with acceptable workability and mechanical properties.

wood biomass ash, pozzolanic activity, chemical composition, workability, hydration

Authors acknowledge the support of CSF(HRZZ) project IP-2016-06-7701 ‘’Transformation of wood biomass Ash into REselient Construction Composites - TAREC2’’.