Influence of size of aggregates on the Compressive strength of concrete

  Neetu,  Ahsan Rabbani

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 (10 mm, 12 mm and 15mm) 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 after 7 days curing. The results reflected that workability (slump) increased with increasing aggregate size. The concrete made from the 10 mm, 12mm and 15 mm aggregate sizes had workability (slumps) of 10 mm, 15 mm and 20 mm, respectively. The mean compressive strength for the 10 mm, 12 mm, and 15 mm were 13 N/mm2, 15 N/mm2 and 20 N/mm2, respectively. The 10 mm and 12 mm aggregates had compressive strengths that were significantly different, while the 10 mm and 15 mm aggregate sizes had compressive strengths that were not significantly different. It was concluded that concrete workability (slump) was directly proportional to aggregate size. The mean concrete compressive strength increased with increasing aggregates size.

Keywords- Aggregate Size, Concrete, Compressive Strength, Models.

Unique Identification Number - IJEDR1703005
Page Number(s) - 27-30
Pubished in - Volume 5 | Issue 3 | July 2017
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Neetu,  Ahsan Rabbani,   "Influence of size of aggregates on the Compressive strength of concrete", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 3, pp.27-30, July 2017, Available at :http://www.ijedr.org/papers/IJEDR1703005.pdf