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Properties Of Concrete

Composites have been found to be the most promising and discerning material available in this century. Presently, composites reinforced with fibers of synthetic or natural materials are gaining more importance as demands for lightweight materials with high strength for specific applications are growing in the market. Fiber-reinforced polymer composite offers not only high strength to weight ratio, but also reveals exceptional properties such as high durability; stiffness; damping property; flexural strength; and resistance to corrosion, wear, impact, and fire. These wide ranges of diverse features have led composite materials to find applications in mechanical, construction, aerospace, automobile, biomedical, marine, and many other manufacturing industries. Performance of composite materials predominantly depends on their constituent elements and manufacturing techniques, therefore, functional properties of various fibers available worldwide, their classifications, and the manufacturing techniques used to fabricate the composite materials need to be studied in order to figure out the optimized characteristic of the material for the desired application. An overview of a diverse range of fibers, their properties, functionality, classification, and various fiber composite manufacturing techniques is presented to discover the optimized fiber-reinforced composite material for significant applications. Their exceptional performance in the numerous fields of applications have made fiber-reinforced composite materials a promising alternative over solitary metals or alloys.

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Fiber-Reinforced Polymer Composites: Manufacturing, Properties, and Applications.

Effects of elevated temperatures on properties of concrete

Thermal and mechanical properties of fiber reinforced high performance self-consolidating concrete at elevated temperatures

Critical factors governing the fire performance of high strength concrete systems

Outcomes of a major research on fire resistance of concrete columns

Aspects of behaviour of CFRP reinforced concrete beams in bending

Performance of cellular composite floor beams at elevated temperatures

A new method for evaluating the surface roughness of concrete cut for repair or strengthening

Ultra-high performance fibre reinforced concrete (UHPFRC) is a relatively new construction material. In comparison with conventional high strength concrete UHPFRC usually does not contain coarse aggregates larger than 6–7 mm in size. This paper presents the outcomes of an experimental study of UHPFRC beams subjected to four-point loading. The effect of two parameters was studied, namely the fibre content and the temperature of curing water. Eight UHPFRC beams comprising 6 beams reinforced with rebars and two beams without rebars were tested. Three fibre contents were investigated in this study (1%, 2% and 4% in volume). The study investigated two curing temperatures of water which are 20°C and 90°C. The results presented in this paper include deflections, toughness energy and moment capacity and also includes a comparison with calculations according to EC2 provisions. A minor difference was observed in the deformation and flexural behaviour of beams with fibre contents of 1% and 2% (in volume). However, beams with 4% (in volume) fibres exhibited a higher flexural capacity. Only flexural failure was observed and no shear related failure was recorded. Beams with 1% (in volume) fibres for both curing regimes had the highest peak-load toughness energy. Beams reinforced with rebars and cured at 20°C had a significantly higher bending resistance.

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Ali Nadjai

Papers

Outcomes of a major research on fire resistance of concrete columns

Aspects of behaviour of CFRP reinforced concrete beams in bending

Performance of cellular composite floor beams at elevated temperatures

A new method for evaluating the surface roughness of concrete cut for repair or strengthening

Structural Performance of Ultra-High Performance Fibre Reinforced Concrete Beams