Durability properties of autoclaved aerated and high performance foamed concrete

Author(s): Genadijs Sahmenko, Aleksandrs Korjakins, Eva Namsone
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 153-158
Total Pages: 6
Language : English

Abstract: Autoclaved Aerated Concrete (AAC) and Foam Concrete (FC) are sustainable lightweight intelligent materials for the modern building industry. FC is a more universal material and it may be applied both for monolithic and prefabricated constructive elements. Flexible technology of FC allows achieving a wide range of properties (density 200 – 1800 kg/m3 and compressive strength 0.2 – 40 MPa). The range of properties of a typical AAC includes density 250 – 800 kg/m3 and compressive strength 0.5 – 10 MPa, but normal weight ready- mixed concrete is characterized by density > 2000 kg/m3 and compressive strength 30 – 50 MPa.
In comparison with ACC, FC is more durable, at the same time, FC has lower strength at the same density, comparing to the aerated autoclaved concrete. The aim of this study is to elaborate high performance foam concrete, characterized by high durability properties and competitive compressive strength.
In the framework of this study, foam concrete compositions were elaborated, using intensive mixing technology and micro admixtures in order to improve their physical and mechanical properties. Properties of the elaborated compositions, such as density, compressive strength, capillary water absorption and frost resistance, were compared with the properties of commercially used AAC. The obtained FC compositions are characterized by low water absorption, high frost resistance and strength – density relation comparable with AAC.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00