Flexural Performance of Engineered Cementitious Compositelayered Reinforced Concrete Beams

Abstract

This study focuses to develop a new hybrid Engineered Cementitious Composite (ECC) and assesses the performance of a new hybrid ECC based on the steel short random fiber reinforcement. This hybrid ECC aims to improve the tensile strength of cementitious material and enhance better flexural performance in an RC beam. In this study, four different mixes have been investigated. ECC with Poly Vinyl Alcohol (PVA) fiber and PolyPropylene (PP) fiber of 2.0% volume fraction are the two Mono fiber mixes; ECC mix with PVA fiber of 0.65% volume fraction hybridized with steel fiber of 1.35% volume fraction, PP fiber of 0.65% volume fraction hybridized with steel of 1.35% volume fraction are the two additional different hybrid mixes. The material properties of mono fiber ECC with 2.0 % of PVA is kept as the reference mix in this study. The hybridization with fibers has a notable achievement on the uniaxial tensile strength, compressive strength, Young’s modulus, and flexural behavior in ECC layered RC beams. From the results, it has been observed that the mix with PVA fiber of 0.65% volume fraction hybrid with steel fiber of 1.35% volume fraction exhibit improvements in tensile strength, flexural strength, and energy absorption. The PP fiber of 0.65% volume fraction hybridized with steel of 1.35% volume fraction mix has reasonable flexural performance and notable achievement in displacement ductility over the reference mix.

Behaviour of hybrid fibre reinforced concrete-filled steel tubular beams and columns

“…The energy absorption of conventional mix beam M1 was 6217 kN mm and CFST beams of mixes M5, M10, M13 and empty steel tubular beam were found to be 8362 kN mm, 6969 kN mm, 7969 kN mm, 2350 kN mm respectively. From results, it was found that CFST beam with 2% steel fiber volume fraction carries the maximum load with notable deflection due to high modulus of rigidity of fiber [23]. However, the energy absorption capacity of CFST beam with 2% of polypropylene fiber is high when compare with other beams because the polypropylene fiber is a low modulus fiber and which exhibits high elongation with minimum load carrying capacity [24].…”

Study on impact of fiber hybridization in material properties of engineered cementitious composites

“…ECC is a type of improved high-performance fiber reinforced cementitious composite (HPFRCC) [4,5]. The ECC and fiber reinforced concrete have similar materials, which includes sand, cement, water, fiber, and some chemical additives.…”

Compressive Strength Prediction of PVA Fiber-Reinforced Cementitious Composites Containing Nano-SiO2 Using BP Neural Network

“…Related research results indicated that cementitious materials work against environmental pollution by minimizing the emission of CO 2 , other pollutant gases and waste dust, exhibit important feasibility and application prospects, and may become an appropriate substitute for traditional cement mortar in the future [5]. Some researchers have produced some new materials 2 of 24 to replace the traditional cement totally or in part, such as concrete incorporating ferronickel slag (FNS) as a replacement of natural sand [6] and engineered cementitious composite layered reinforced concrete beams [7]. Simultaneously, descriptions of fibers in cementitious composites containing polydispersed hollow and core-shell microparticles [8], waste recycled hollow glass microspheres [9], multiwalled carbon nanotubes [10], nano reservoir silts [11], SiO 2 nanoparticles [12], palm oil fuel ash [13], inclined steel fiber [14], cellulose nanocrystals [15], cobalt ferrite and nanoparticles [16] are abundant.…”