الفهرس 
Chapter 1 : Introduction
Constituent materialsOnly 14 pages are availabe for public view
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Abstract
Introduction: Nowadays the whole world aims to produce lightweight concrete. One of methods to produce lightweight concrete is foamed concrete. Furthermore, the foamed concrete is considered as an economical solution in fabrication of large-scale lightweight construction materials. and components such as structural members, partitions, filling grades, and road embankment infills due to its easy production process from manufacturing plants to final position of the applications.Research objective: Studying the effect of density on the properties of fresh and hardened foamed concrete. Moreover, studying the effect of replacement materials on different densities of foamed concrete.Steps study: Producing foamed concrete with different densities 1200, 1500 and 1800 kg/m3 by using mixed foaming method. Silica fume and fly ash were used as partial cement and sand replacement respectively with different percentage. Fresh properties, mechanical properties and thermal conductivity were obtained by tests. All the mixes result at fresh and hardened state were compared to control mix.Conclusions: The higher the density of foamed concrete, the greater the mechanical properties. Using replacement materials at certain dosage improve the mechanical properties. Foamed concrete has a thermal insulation feature. As the density of foamed concrete increase, the thermal conductivity increase. The density of 1200 kg/m3 is more suitable for thermal insulation than the other densities (1500 and 1800 kg/m3).