| Popis: |
In production of autoclaved aerated concrete (AAC) units, after mechanical processing and hardening in autoclaves, the waste of hardened product is unavoidably generated. Till now this waste has no utilization. The investigations within this work showed that the crushed AAC waste, sized from 2.5 mm to 10.0 mm, can perform the function of a lightweight aggregate in development of the composite with density of ≤ 850 kg/m3 and compressive strength up to 4.0 MPa. The matrix of this product is composed of hardened Portland cement and modifying additives (complex additive, CA). It was established that, thank to CA, in the structure of the composite, the AAC granules are coated by a thin layer of cement stone, 50.0 μm thick, and the properties close to those of AAC are ensured. |
