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High-Early-Strength Concrete (also known as fast-track concrete), achieves its specified strength at an earlier age compared to normal concrete. This earlier age is the time period in which a specified strength should be achieved and may range between a few hours (or even minutes) to several days. Although it can be achieved using traditional concrete ingredients and concreting practices, the production of HESC will sometimes require special materials or techniques. Depending on the age at which the specified strength must be achieved and on job conditions, one or a combination of the...

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Seismic Analysis and Response of Bare and Masonry-Infilled Reinforced Concrete Frame Structures
Since the infill walls play some roles during earthquakes, their design need consideration to withhold lateral forces. From a research conducted out, most concrete structures succumb to seismic loads due to: Failures of beam-column joints as a result of poor reinforcement at the joints and/or poor workmanship in installation of reinforcement beams; Basic failure that results from flexural weakness and or low shear strength; Failure of the infill wall that results from enough shear strength or a flexural strength that is out-of-plane (Griffith, Mike 2008, p.2). The relationship between...

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Steel Fibre Reinforced Concrete
Two-point load test was used to examine the bending moment of the bars while the cubes were subjected to compression tests for estimating their compressive strength. The flexural strength was also quantified. The effects observed on the steel fiber and steel bar reinforced beams and cubes were compared with those of beams and cubes made with plain concrete. The observations and comparisons are discussed. Introduction High durability and strength are an important prerequisite for concrete structures as they are continuously exposed to various forces, both static and dynamic (Elavenil & Knight...

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