Mechanical properties and microstructure of recycled mortar reinforced with hybrid fiber

  • Abstract
  • Keywords
  • References
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  • Abstract

    This study investigated the hybrid effects of two types of microfiber, namely, polypropylene and nylon, on the mechanical properties of high-strength mortar, which produced fine recycled aggregate (FRA). The amount of microfibers was maintained at a volumetric fraction of 0.6%. The microstructure and mechanical strength properties (compressive strength and flexural strength) of recycled mortar reinforced with hybrid-size microfibers were evaluated at various curing ages. Experimental results show that the inclusion of hybrid fibers significantly influenced the mechanical performance of the recycled mortar. The hybridization fiber at volume fraction 0.3% polypropylene + 0.3% nylon yielded the most promising mechanical performance. Enhancements of 8% on compressive and 11% flexural strength were achieved at 28 days. Scanning electron microscopy observations revealed that reinforcement at the microscale prohibited the initiation and growth of cracks at the micro level. High loads were required to form macrocracks within composites, thereby improving the mechanical strength of the mortar matrix.



  • Keywords

    Fine Recycled Aggregate; Hybrid Fiber; Nylon Fiber; Polypropylene Fiber; Recycled Mortar.

  • References

      [1] L. Restuccia, et al., "Recycled mortars with C&D waste," in 21st European Conference on Fracture, ECF21, Catania, Italy, 2016, pp. 2896-2904.

      [2] E.F. Ledesma, et al., "Properties of masonry mortars manufactured with fine recycled concrete aggregates " Construction and Building Materials vol. 71, pp. 289–298, 2014.

      [3] I. Martínez, et al., "A comparative analysis of the properties of recycled and natural aggregate in masonry mortars," Construction and Building Materials, vol. 49, pp. 384–392, 2013

      [4] L. Thang, et al., "Fresh behavior of mortar based on recycled sand – Influence of moisture condition " Construction and Building Materials vol. 106, pp. 35–42, 2016.

      [5] Z. Zhao, et al., "Influence of fine recycled concrete aggregates on the properties of mortars," Construction and Building Materials, vol. 81, pp. 179-186, 2015.

      [6] P. S. Martínez, et al., "Comparative study of three types of fine recycled aggregates from construction and demolition waste (CDW), and their use in masonry mortar fabrication," Journal of Cleaner Production, vol. 118 pp. 162-169, 2016.

      [7] M. Braga, et al., "Incorporation of fine concrete aggregates in mortars," Construction and Building Materials, vol. 36, pp. 960-968, 2012.

      [8] I. Vegas, et al., "Design and performance of masonry mortars made with recycled concrete aggregates " Material Construction, vol. 59, pp. 5-18, 2009.

      [9] S. Shahbazpanahi, et al., "Fracture mechanic modeling of fiber reinforced polymer shear-strengthened reinforced concrete beam," Composites: Part B vol. 68, pp. 113–120, 2015.

      [10] S. Ismail and M. Ramli, "Mechanical strength and durability properties of concrete containing treated recycled concrete aggregates under different curing conditions," Construction and Building Materials, vol. 155, pp. 296-306, 2017.

      [11] Mohammad Reza Z. and C. Shih-Ho, "Shear strength enhancement mechanisms of steel fiber-reinforced concrete slender beams " ACI Structural Journal vol. 114, pp. 729-742., 2017.

      [12] W. Zhang, et al., "Effect of weight and drop height of hammer on the flexural impact performance of fiber-reinforced concrete," Construction and Building Materials, vol. 140, pp. 31-35, 2017.

      [13] S. Orasutthikul, et al., "Effectiveness of recycled nylon fiber from waste fishing net with respect to fiber reinforced mortar," Construction and Building Materials, vol. 146, pp. 594-602, 2017.

      [14] Razmi A. and Mirsayar M.M, "On the mixed mode i/ii fracture properties of jute fiber-reinforced concrete," Construction And Building Materials, vol. 148, pp. 512-520, 2017.

      [15] M. Ahmadi, et al., "Mechanical properties of the concrete containing recycled fibers and aggregates " Construction and Building Materials vol. 144, pp. 392–398, 2017.

      [16] Alrekabi S., et al., "Mechanical performance of novel cement-based composites prepared with nano-fibres, and hybrid nano- and micro-fibres " Composite Structures vol. 178, pp. 145–156, 2017.

      [17] E. T. Dawood and M. Ramli, "High strength characteristics of cement mortar reinforced with hybrid fibres," Construction and Building Materials vol. 25, pp. 2240–2247, 2011.

      [18] Q. S. Banyhussan, et al., "Deflection-hardening hybrid fiber reinforced concrete: The effect of aggregate content " Construction and Building Materials vol. 125, pp. 41–52, 2016.

      [19] M. A. Rasheed and Suriya Prakash S., "Behavior of hybrid-synthetic fiber reinforced cellular lightweight concrete under uniaxial tension – Experimental and analytical studies " Construction and Building Materials vol. 162, pp. 857–870, 2018.

      [20] Vineetha V. V. and A. Aravind, "Mechanical Properties of Hybrid Fibre Reinforced Concrete using Recycled Aggregate Vineetha V. V1 and Arya Aravind2," International Journal of Advances in Scientific Research and Engineering vol. 03, pp. 47-56, 2017.

      [21] S. Ismail and R. Mahyuddin, "Impact resistance of recycled aggregate concrete with single and hybrid fibers," in The 3rd International Conference on Civil and Environmental Engineering for Sustainability (IconCEES 2015), Melaka, Malaysia, 2015.

      [22] G. G. Vaishali and H. S. Rao, "Strength and Permeability Characteristics of Fiber Reinforced High Performance Concrete with Recycled Aggregates," Asian Journal of Civil Engineering (Building and Housing), vol. 13, 2012.

      [23] V. Vytlačilová, "The fibre reinforced concrete with using recycled aggregates," International Journal of Systems Applications, Engineering & Development, vol. 5, 2011.

      [24] H. A. Mesbah and F. Buyle-Bodin, "Efficiency of polypropylene and metallic fibres on control of shrinkage and cracking of recycled aggregate mortars," Construction and Building Materials, vol. 13, pp. 439-447, 1999.

      [25] C. X. Qian and P. Stroeven, "Development of hybrid polypropylene-steel fibre-reinforced concrete," Cement and Concrete Research vol. 30, pp. 63–69, 2000.

      [26] S. Ismail and M. Ramli, "Mechanical strength and drying shrinkage properties of concrete containing treated coarse recycled concrete aggregates," Construction and Building Materials, vol. 68, pp. 726-739, 2014.




Article ID: 12279
DOI: 10.14419/ijet.v7i4.12279

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