Investigation of the Composite Material with Inclusions of Autoclaved Aerated Concrete Chips

Authors

  • Marijonas SINICA, Georgijus SEZEMANAS∗, Donatas MIKULSKIS1, Modestas KLIGYS, Vytautas ČESNAUSKAS, Petro ZACHARČENKO, Petro KUPRIJENKO, Natalija ŠČERBINA, Natalija PIVENJ 1Vilnius Gediminas Technical University of Thermal Insulation

Keywords:

AAC chips, Portland cement binding material, super plasticizer, air entraining additive (AEA), SiO2 micro dust, operational properties

Abstract

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.

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Published

2009-12-10

Issue

Vol. 15 No. 4 (2009)

Section

CONSTRUCTION MATERIALS

License

 

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