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A Study on the Effect of Size of Aggregate on the Strength and Sorptivity Characteristics of Cinder Based Light Weight Concrete

Author Affiliations

  • 1Department of Civil Engineering, National Institute of Technology, Warangal, Andhra Pradesh, INDIA
  • 2 Department of Civil Engineering, Chaitanya Bharathi Institute of Technology, Hyderabad, AP, INDIA

Res. J. Engineering Sci., Volume 1, Issue (6), Pages 27-35, December,26 (2012)

Abstract

It is known that the largest maximum size of aggregate possible to handle could be used in concrete under a given set of conditions. There are benefits of choosing a correct maximum size of aggregate (MSA), viz. reduction in the cement content and drying shrinkage. Variation in the size of aggregate alters the micro cracking of concrete which there by modifies the strength and durability as well. Also, the strength and durability of concrete is dependent on sorptivity, an index of concrete permeability. The pore structure in LWA, which is otherwise porous in nature, can be modified with fly ash inclusion, which not only modifies the density but also enhances the durability of concrete. In the present study, the strength and sorptivity characteristics of concrete made with cinder-based lightweight aggregates are investigated. Prior to this the size of cinder based light weight aggregate was optimized. The present investigation aims at developing two grades, 20Mpa and 30Mpa, of light weight concrete using cinder based aggregate of different sizes. The results indicated that Light Weight Concrete can be developed with all sizes of graded aggregate satisfying the fresh and hardened state characteristics. The mechanical properties viz., compressive strength and split tensile strengths were studied at the end of 3, 7 and 28 days for medium grade concretes with different sizes of aggregate. It was noted that with 12.5mm size aggregate and 30% flyash replacement, the mechanical properties were superior in 20Mpa Light weight Concrete, while 10 mm size aggregate with a 30% fly ash replacement improved the properties of 30Mpa concrete. There was also an improved performance in terms of sorptivity of fly ash based Light weight Aggregate Concrete.

References

  1. Alengaram U.J., Mahmud H., Jumaat M.Z, and Shirazi S.M., Effect of aggregate size and proportion on strength properties of palm kernel shell concrete, International Journal of the Physical Sciences, 5(12), 1848-1856 (2010)
  2. Abdullahi M., Al-Mattarneh H.M.A. and Mohammed B.S.,Equations for Mix Design of Structural Lightweight Concrete, European Journal of Scientific Research, 31(1), 132-141 (2009)
  3. Tumidajsk P.J.,Effect of slag, silica fume, and finishing on the sorptivities of field concrete, Canadian Journal of Civil Engineering, 33(8), 1022–1026 (2006)
  4. Oliveira L.A.P., Castro Gomes J.P. and Pereira C.N.G.,Study of sorptivity of self-compacting concrete with mineral additives, Journal of Civil Engineering and Management, 12(3), 215-220 (2006)
  5. Tumidajski P.J. and Gong B.,Effect of coarse aggregate size on strength and workability of concrete, Canadian Journal of Civil Engineering, 76-78 (2006)
  6. Chen B. and Liu J., Effect of aggregate on the fracture behavior of high strength concrete, Construction and Building Materials, 18(8), 585-590 (2004)
  7. Tasdemir C.,Combined effects of mineral admixtures and curing conditions on the sorptivity coefficient of concrete, Cement and Concrete Research, 33(10), 1637-1642 (2003)
  8. ACI 213R-03,Guide for Structural Lightweight-Aggregate Concrete, American Concrete Institute (2003)
  9. Rathish Kumar P. etal, A study on the Sorptivity characteristics of High Performance Mortars, Journal of Institution of Engineers, 83, 1-7 (2002)
  10. Rathish Kumar P. etal, A cost effective mix design methodology using Flyash as a partial replacement for cement at the national seminar on Role of Engineering Institutions, Construction Industry and Building Research Institutes in Low cost Housing, M.I.T.S Gwalior January (1996)
  11. IS: 13311-1992 (Part-1), Indian Standard Method of non-destructive testing of concrete, Bureau of Indian Standards, New Delhi (1992)
  12. IS: 13311-1992 (Part-2), Indian Standard Method of non-destructive testing of concrete, Bureau of Indian Standards, New Delhi (1992)
  13. Victor E., Saouma J.J., Brühwiler B.E. and Boggs H.L.,Effect of Aggregate and Specimen Size on Fracture Properties of Dam Concrete, Journal of Materials in Civil Engineering, 3(3), 204-218 (1991)
  14. Ibragimov A.M., Effect of the maximum size of coarse aggregate on the main parameters of concrete, Power Technology and Engineering, 23(3), 141-144 (1989)
  15. IS 516-1959, Method of test for strength of concrete, Bureau of Indian Standards, New Delhi, India,The date of publication is 1959 and reaffirmed in 1999 (1999)