Flexural strength

About: Flexural strength is a research topic. Over the lifetime, 52123 publications have been published within this topic receiving 846504 citations. The topic is also known as: bending strength & modulus of rupture.

Characterisation of cotton fibre-reinforced geopolymer composites

Abstract: This paper describes the physical, mechanical and fracture behaviour of fly-ash based geopolymer reinforced with cotton fibres (0.3–1.0 wt%). Results show that the appropriate addition of cotton fibres can improve the mechanical properties of geopolymer composites. In particular, the flexural strength and the fracture toughness increase at an optimum fibre content of 0.5 wt%. However, as the fibre content increases, the density of geopolymer composites decreases due to an increase in porosity and tendency of fibre agglomeration.

Timber Beams Strengthened with GFRP Bars: Development and Applications

Abstract: Repair and rehabilitation of infrastructure is becoming increasingly important for bridges due to material deterioration and limited capacity to accommodate current load levels. An experimental program was undertaken to study the flexural behavior of creosote-treated sawn Douglas fir timber beams strengthened with glass fiber-reinforced polymer (GFRP) bars. Twenty-two half-scale and four full-scale timber beams strengthened with GFRP were tested to failure. The percent reinforcement ratios were between 0.27 and 0.82%. Additional unreinforced timber beams were tested as control specimens. The results have shown that using the proposed experimental technique changed the failure mode from brittle tension to compression failure, and flexural strength increased by 18 to 46%. Research findings indicate the use of near-surface GFRP bars overcomes the effect of local defects in the timber and enhances the bending strength of the members. Based on the experimental results, an analytical model is proposed to predict the flexural capacity of both unreinforced and GFRP-reinforced timber beams. The article also reviews implementation of the proposed technique for strengthening a timber bridge near Winnipeg, Manitoba, Canada.

Flexural Behavior of Reinforced Recycled Concrete Beams

Abstract: In order to evaluate whether concrete with recycled aggregate can be applied for concrete structures, flexural loading tests of reinforced recycled concrete members were carried out The recycled coarse aggregate and the recycled fine aggregate were produced mainly from various reinforced concrete members of a building structure as well as from 300 mm cubic concrete specimens The properties of concrete with recycled aggregates, such as strength, Young's modulus, shrinkage, creep and shrinkage-induced stress depending on the combination of natural and recycled aggregates, curing condition, and water to binder ratio, were discussed based on a comparison with the properties of concrete with virgin aggregates Furthermore, the flexural behavior of reinforced recycled concrete beams was also discussed through comparison with the behavior of companion virgin concrete beams in which the tension reinforcement ratio, curing condition, and water to binder ratio of concrete, are the main factors The results indicate the mechanics-based possibility of utilizing recycled concrete for reinforced concrete structures under the proper design and within the proper limit of application