Characterization and Modeling the Behavior of Foamed Concrete

Abstract

Due to its superior characteristics, such as low density, high thermal insulation and high fire resistance, foamed concrete is gaining popularity in the engineering construction field. Foamed concrete one of light weight concrete classification (LWC); typically consists of cement, filler (sand and/or lime powder), water and foaming agent; in which air or gas bubbles are introduced into conventional mortar to give it the aforementioned properties. Despite the abundance of research in the past decade, lack of knowledge remains regarding the prediction of the mechanical and physical properties of foamed concrete with/without adding mineral additives such as microsilica and fly ash; necessitating further experimentation and modelling. The common practice of casting foamed concrete in Egypt – for insulation purpose – is predominantly a function of experience rather than design. In this regards, the purpose of this study is to investigate the influence of inputproportions/ ratios such as: foam volume,sand-to-filler ratio and filler-to-cement ratio - in addition to adding fly ash and microsilica to mixtures - on the physical, mechanical and functional properties of foamed concrete. These properties include density, absorption, compressive strength, flexural strength and thermal