Assessment of Reinforced Recycling Aggregate Concrete Beams Under Torsional Moment

 
 
 
  • Abstract
  • Keywords
  • References
  • PDF
  • Abstract


    The recycling of aggregate concrete (RAC) is the ideal solution for reducing the natural resources. The experimental works have been carried out to investigate the torsional moment behavior and the strength of RAC beams in comparison with those  beams consisting of natural aggregate concrete (NAC). Nine beams were casted with different compression strengths of concrete (25, 45, and 70 MPa), and coarse RAC of three different percentages within the full bloc of coarse aggregate in concrete mixes (0, 50, and 100%), with the same reinforcement ratio. The properties of the concrete comprised of recycled and natural aggregates were investigated. The results showed, that the difference in the torque of first crack is less than 12.5% for RAC and NAC beams, while the difference in ultimate torque is less than 7.7% for RAC and NAC. Also, it can be conclude that, the torsional moment performance of RAC beams is acceptable as compared to the conduct of NAC beams and the use of RAC is practically possible

     

     


  • Keywords


    Reinforced concrete beam; Recycled aggregates; Torsional moment behavior

  • References


      [1] Kasai, Y., & Fujii, T. “Demolition and reuse of concrete and masonry”. Concrete International, Vol. 11, No. 3, (1989), pp.24-28.‏

      [2] Rao, A., Jha, K. N., & Misra, S. “Use of aggregates from recycled construction and demolition waste in concrete”. Resources, conservation and Recycling, Vol. 50, No.1, (2007), pp.71-81.‏

      [3] Hansen, T. C. “Recycling of Demolished Concrete and Mansory”. RIREM Report l, 1994.‏

      [4] Yagishita, F. (1994). “Behavior of reinforced concrete beams containing recycled coarse aggregate”. Demolition and Reuse of Concrete and Masnry, pp. 331-342.‏

      [5] Ryu, J. S. "An experimental study on the effect of recycled aggregate on concrete properties." Magazine of concrete research. Vol. 54, No. 1, (2002), pp. 7-12.‏

      [6] Xiao J, Li J, Zhang Ch. Mechanical properties of recycled aggregate concrete under uniaxial loading. Cement Concrete Res. Vol. 35, No.6, (2005), pp. 1187–1194.

      [7] González, B., & Martínez, F. “Shear strength of concrete with recycled aggregates”. In Ed.), Int. RILEM Conf. Use Recycl. Mater. Build. Struct., Barcelona, Spain, (2004), pp. 619-628.‏

      [8] Choi, H. B.; Yi, C. K.; Cho, H. H.; and Kang, K. I., “Experimental Study on the Shear Strength of Recycled Aggregate Concrete Beams”, Magazine of Concrete Research, Vol. 62, No. 2, (2010), pp. 103-114.

      [9] Schubert, Sandy, "Recycled aggregate concrete: experimental shear resistance of slabs without shear reinforcement." Engineering Structures.Vol. 41, (2012): pp. 490-497.‏

      [10] Arezoumandi, M., Drury, J., Volz, J. S., & Khayat, K. H. “Effect of Recycled Concrete Aggregate Replacement Level on Shear Strength of Reinforced Concrete Beams”. ACI Materials Journal, Vol. 112, No. 4, July-August (2015).

      [11] Central Organization for Standardization and Quality Control; "Iraqi Standard Specification for the Portland Cement”, Baghdad, Iraq. IQS 5, (1984).

      [12] Iraqi Specification No. 45, "Natural Sources for Gravel that is Used in Concrete and Construction". Baghdad, (1984).

      [13] American Society of Testing and Material (ASTM), "Standard Specification for Concrete Aggregates", ASTM C33-02, West Conshohocken, PA, (2002).

      [14] Standard Specification for Chemical Admixtures for Concrete. ASTM-C494-05, American Society for Testing and Material, (2005).

      [15] ASTM, ASTM. "C1240: Standard specification for silica fume used in cementitious mixtures." ASTM International, West Conshohoken, PA, USA (2014).‏

      [16] ASTM, Standard C143-00, “Standard Test Method for Slump of Hydraulic Cement Concrete,” ASTM International, West Conshohocken, PA.

      [17] ACI 211.1-97, "Standard practice for selecting proportions for normal, heavy weight and mass concrete", ACI Manual of Concrete Practice, American Concrete Institute, Detroit, (1997).

      [18] ASTM Designation C39-01 "Standard specification for testing method for compressive strength of cylindrical concrete specimens", 2001 Annual Book of ASTM Standards, American Society for Testing and Material, Philadelphia, Pennsylvania, Section 4, Vol. (4.02), (2001), pp 20-24.

      [19] ASTM Designation C469-02 "Standard specification for testing method for static modulus of elasticity and poison's ratio of concrete in compression", 2002 Annual Book of ASTM Standards, American Society for Testing and Material, Philadelphia, Pennsylvania, Section 4, Vol. (4.02), (2002), pp 236-239.

      [20] ASTM Designation C496-96 "Standard specification for splitting tensile strength of cylindrical concrete specimens", 1996 Annual Book of ASTM Standards, American Society for Testing and Material, Philadelphia, Pennsylvania, Section 4, Vol. (4.02), (1996), pp 1-4.

      [21] ASTM Designation C78-02 "Standard specification for testing method for flexural strength of concrete (using simple beam with third-point loading)", 2002 Annual Book of ASTM Standards, American Society for Testing and Material, Philadelphia, Pennsylvania, Section 4, Vol. (4.02), (2002), pp 32-34.

      [22] ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318M-14) and Commentary (ACI 318RM-14)”, American Concrete Institute, Michigan, USA, (2014), 519 pp.

      [23] MacGregor, J. G. and Ghoneim, M. G., "Design for Torsion", ACI Structural Journal, Vol. (92), No. 2, March-April (1995), pp. 211-218,

      [24] Belén, G. F., Fernando, M. A., Diego, C. L., & Sindy, S. P. “Stress–strain relationship in axial compression for concrete using recycled saturated coarse aggregate”. Construction and Building materials, Vol. 25, No. 5, (2011), PP. 2335-2342.‏


 

View

Download

Article ID: 27403
 
DOI: 10.14419/ijet.v7i4.20.27403




Copyright © 2012-2015 Science Publishing Corporation Inc. All rights reserved.