| Abstract [eng] |
This study evaluates the suitability of an artificial wood-sawdust-based aggregate for concrete. The performance of this aggregate was compared with other aggregates and concrete without aggregate. The experimental program included semi-adiabatic calorimetry, flexural and compressive strength tests, shrinkage deformation measurements, porosity, and water absorption analysis. Additionally, the resistance to salt-scaling was assessed, and the potential CO₂ reduction achieved by replacing traditional aggregates with wood-based granules was calculated. Lightweight artificial aggregates were produced and later used in mortars for further experiments, replacing sand in the mixtures. The results in the experimental part showed that the addition of wood sawdust reduces the heat released during hydration. When chemical admixtures were incorporated, the initial temperature increased and hydration accelerated. The bulk density of wood-sawdust granules was found to be twice that of expanded clay and foam glass granules. Most shrinkage occurred within the first two weeks, after which the deformation gradually stabilized. Overall, the findings indicate that wood-sawdust granules represent a promising sustainable aggregate alternative, potentially contributing to reduced CO₂ emissions in concrete production. Masters’ final work contains 19 tables, 36 figures, 62 references. |
