الفهرس 
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Abstract
The following investigation was conducted to determine the mechanical, thermal properties of expanded polystyrene (EPS) foam lightweight concrete (LWC). EPS foams have a cellular microstructure with closed cell membranes made of expandable polystyrene (EPS) and its density is typically less than 50 kg/m3. Recently applications of EPS lightweight concrete include cladding panels, curtain walls, composite flooring systems, load-bearing concrete blocks, sub-base material for pavements, and floating marine structures, as well as impact-resistant structural protection layers, because of the good energy-absorbing characteristics of LWC.
The experimental program incorporated two phases. The first phase was developed by partially replacing normal weight aggregate with recycled EPS foam beads, while the used replacement ratios (0%, 5%, 10%, 15%, 20%, 25%, 35% and 50%) were measured by volume replacement. The second phase dial with the partially replacing by weight of cement type (I) with different percentages of silica fume (SF) in EPS foamed concrete, which ranges from 0% - 15% using 5% intervals. Twenty three concrete designation mixtures were constructed. Different tests were conducted in accordance with standards set forth by the American Society for Testing and Materials (ASTM) and Egyptian Code Practice (ECP) 203 part: 3, in order to determine the fresh and mechanical properties of the material. These tests included the standard test methods for Fresh Concrete density, Slump, Compacting Factor, Hardened Concrete Density, Absorption, Compressive Strength of Cube Concrete Specimens, Splitting Tensile Strength of Cylindrical Concrete Specimens, Flexural Strength of Beams Concrete Specimens, Ultrasonic Pulse Velocity and Elasticity Modulus of Concrete; also the Stress Strain Curve and Thermal Conductivity were determined for different EPS foamed concrete.