Journal of Agricultural Science and Engineering, Vol.2, No.6, Dec. 2016, Pub. Date: Jan. 9, 2017
The Effect of Aggregate Size on the Compressive Strength of Concrete
Pages: 66-69 Views: 118 Downloads: 94
Bruce Roy Thulane Vilane, Department of Agricultural and Biosystems Engineering, Faculty of Agriculture, University of Swaziland, Luyengo Campus, Swaziland.
Ndlangamandla Sabelo, Department of Agricultural and Biosystems Engineering, Faculty of Agriculture, University of Swaziland, Luyengo Campus, Swaziland.
Aggregate grading is an important element in concrete mixing and the resultant compression strength. An experiment was conducted to determine the effect of aggregate size on the compressive strength of concrete. The experiment had three treatments, which were the aggregate sizes (9.5 mm, 13.2 mm and 19.0 mm) and the control. A constant mix of 1:2:4 with a water/cement ratio of 0.5 was used throughout the experiment. Tests that were conducted included the slump and compressive strength tests. Fresh concrete batches were formulated from each of the coarse aggregate sizes and the slump test was conducted to test for workability. Three cubes (150 mm × 150 mm) were cast from each batch and the compressive strength was determined using a concrete load testing machine (Pro-Ikon cube press) after 7 days curing. The results reflected that workability (slump) increased with increasing aggregate size. The concrete made from the 9.5 mm, 13.2 mm and 19.0 mm aggregate sizes had workability (slumps) of 10 mm, 13.5 mm and 20 mm, respectively. The mean compressive strength for the 9.5 mm, 13.2 mm, and 19 mm were 15.34 N/mm2, 18.61 N/mm2 and 19.48 N/mm2, respectively. The 9.5 mm and 19.0 mm aggregates had compressive strengths that were significantly different (P<0.05; 0.034), while the 13.2 mm and 19.0 mm aggregate sizes had compressive strengths that were not significantly different (P>0.05; 0.585). It was concluded that concrete workability (slump) was directly proportional to aggregate size. The mean concrete compressive strength increased with increasing aggregates size.
Aggregate Size, Concrete, Compressive Strength
Adiseshu, S. and Ganapati, N. P. (2011). Influence of coarse aggregates on the strength of asphalt concrete mixtures. Influence of coarse aggregate shape factors on bituminous mixtures. International journal of Engineering Research and Application (IJERA). Vol. 1 (4) 2013-2014.
Ajamu, S. O. and Ige, A. J. (2015). The effect of coarse aggregate size on the compressive strength and the flexural strength of concrete. Journal of Engineering Research and Applications. Vol. 5, Issue 1 (Part 4), 2015: 67-75
Alammayan, A. (2014). Effect of coarse aggregates on strength of concrete. http://www.quora.com/What-is-the-effect-of-coarse-aggregate-size-in-compressive-strength-of-concrete. Accessed October, 2016.
Anonymous, (2012). Functions and requirements of ingredients of cement concrete. http://weebo.hubpages.com/hub/Functions-and-requirements-of-ingredients-of-cement-concrete. Accessed October, 2016.
Bengtsson, L. P. and Whitaker, J. H. Ed. (1988). Farm Structures in Tropical Climates. FAO, Rome.
Hassan, N. and Mohammed, A. B. (2014). Effects of maximum particle size of coarse aggregate on the compressive strength of normal concrete. Journal of Engineering and Applied Scientific Research. Department of Civil Engineering Technology, Federal Polytechnic Damaturu. Vol. 6, (2).
Hollaway, L. C., 2010. A review of the present and future utilisation of FRP composites in the civil infrastructure with reference to their important in-service properties. Construction and Building Materials, 24 (12), pp. 2419-2445.
Kim, J. H. (2014). Cement and Concrete Composites. Quantitative measurement of the external and internal bleeding of conventional concrete and SCC. Special Issue on Self-Consolidating Concrete. Vol. 54, 2014, 34–39.
Kozul, R. (1997). Effect of aggregate type, size and content on concrete strength and fracture energy. University of Engineering and Technology Taxila, Pakistan.
Loannides, M. A. and Mills, C. J. (2006). Effect Of Larger Sized Coarse Aggregates On Mechanical Properties Of Portland Cement Concrete Pavements And Structures: State Job No: 148030. Vol. 1. 2006: 30-31.
Marar, K. and Eren, O. (2011) Effect of cement content and water/cement ratio on fresh concrete properties without admixtures. http://www.academicjournals.org/article/article1380725413_Marar%20and%20Eren.pdf. Accessed September, 2016.
Mehta, P. K. and Monteiro, P. J. M. (1993). Concrete: structure, properties, and materials. 2nd ed. Prentice Hall.
NRMCA, (2003). Concrete in practice series. National Ready Made Concrete Association Silver Spring, M. D. www.nrmca.org. Accessed September, 2016.
Pinto, R. C. A. and Hover, K. C. (1999). Application of maturity approach to setting time. American Concrete institute. ACI Materials Journal, Vol. 96, Issue 6. https://www.concrete.org/. Accessed on 25/01/2016.
Raheem, A. A. (2013). Effect of curing methods on density and compressive strength of concrete. International Journal of Applied Science and Technology Vol. 3 (4), 55-64. http://www.ijastnet.com/journals/Vol_3_No_4_April_2013/7.pdf Accessed November, 2016.
Rajith, M and Amritha, E. K. (2015). Performance of Concrete with Partial Replacement of
Cement and Fine Aggregate by GGBS and GBS. International Journal of Research in Advent Technology 2321-9637. Special Issue International Conference on Technological Advancements in Structures and Construction “TASC - 15”, 2015: 10-11. http://www.ijrat.org/downloads/tasc15/TASC%2015-206.pdf. Accessed November, 2016.
Robert, W. (2004). Joining of Materials and Structures. From Pragmatic Process to Enabling Technology 2004, 177–226.
Thomas, J. (2008). Effects of aggregates on workability of concrete. Northwestern university, Evanston, IL.
Waziri B. S.; Bukar, A. G and Gaji, Y. Z. (2011). Applicability of quarry sand as a fine aggregate. Continental J. Engineering Science.
Winter, G. and Nilson, A. H. (2008). Materials (Chapter 2). Design of Concrete structures. Ninth Edition. Mc Graw Hill Higher education; 14th Edition, 23-25.
Woodford, C. (2016). Concrete and reinforced concrete. http://www.explainthatstuff.com/steelconcrete.html. Accessed November, 2016.
Yaqub, M. and Bukhari, I. (2006). Effect of size of coarse aggregate on compressive of high strength concrete. University of Engineering and Technology Taxila, Pakistan. http://cipremier.com/100031052. Accessed October, 2016.