Strength and impact behavior of paving concrete incorporating discarded coconut coir fbers

With the aim to explore the potential contributions of discarded coconut fibers (DCF) as reinforcement in concrete the hardened properties of coir concrete of similar slump, with different fiber lengths and dosages are analysed in this paper, including compressive strength and stiffness, flexural response, and mainly the resistance to impact loading using two tests, that proposed by the ACI Committee 544 and a new method based on the application of Growing Impact Loads. It was found that DCF yields similar effects as synthetic microfibers in fresh and hardened properties of concrete but the incorporation of longer DCF shows improvement in terms of impact resistance.Fil: Zerbino, Raul Luis. Universidad Nacional de La Plata. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Vivas Montes, Juan Carlos. Universidad Nacional de La Plata. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Felipe, Ronald Cruz. Universidad Nacional de La Plata. Facultad de Ingeniería; ArgentinaFil: Torrijos, Maria Celeste. Universidad Nacional de La Plata. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Hours, Francisco. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; ArgentinaFil: Giaccio, Graciela Marta. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería; ArgentinaFil: Khute, Someen. Indian Institute of Technology; IndiaFil: Singh, Surender. Indian Institute of Technology; Indi

Fresh-state behavior of paving concrete reinforced with discarded coconut coir fibres

The present study deals with the fresh state behavior of paving concrete containing discarded coconut coir fibres (DCF). Owing to lower density and hydrophilicity, dispersion of DCF could be a challenging issue and therefore, two approaches are studied for uniformly distributing the DCF in concrete viz. end-stage mixing and intermediate-stage mixing; the parameters of DCF considered are their size (short and long) and proportion (0.1-0.7 % by concrete volume). Thereafter, based on these results, various concrete mixes containing DCF are prepared and studied for their properties – slump, bleeding, plastic shrinkage and compressive strength are the properties investigated. The results favour the adoption of intermediate mixing for better dispersion of DCF in concrete. Concrete mixes containing DCF exhibited lower bleeding as well as the potential to mitigate plastic shrinkage cracking. From this study, it is suggested to include coir at dosages of 0.1 %-0.4 % by concrete volume, depending on the severity of the extreme ambient conditions, for preventing plastic shrinkage cracks in pavement concrete.Fil: Khute, Someen. Indian Institute of Technology; IndiaFil: Surender, Singh. Indian Institute of Technology; IndiaFil: Zerbino, Raul Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería; ArgentinaFil: Gettu, Ravindra. Indian Institute of Technology; Indi

Strength and impact behavior of paving concrete incorporating discarded coconut coir fbers

With the aim to explore the potential contributions of discarded coconut fibers (DCF) as reinforcement in concrete the hardened properties of coir concrete of similar slump, with different fiber lengths and dosages are analysed in this paper, including compressive strength and stiffness, flexural response, and mainly the resistance to impact loading using two tests, that proposed by the ACI Committee 544 and a new method based on the application of Growing Impact Loads. It was found that DCF yields similar effects as synthetic microfibers in fresh and hardened properties of concrete but the incorporation of longer DCF shows improvement in terms of impact resistance.Fil: Zerbino, Raul Luis. Universidad Nacional de La Plata. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Vivas Montes, Juan Carlos. Universidad Nacional de La Plata. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Felipe, Ronald Cruz. Universidad Nacional de La Plata. Facultad de Ingeniería; ArgentinaFil: Torrijos, Maria Celeste. Universidad Nacional de La Plata. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Hours, Francisco. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; ArgentinaFil: Giaccio, Graciela Marta. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería; ArgentinaFil: Khute, Someen. Indian Institute of Technology; IndiaFil: Singh, Surender. Indian Institute of Technology; Indi