Strength Prediction Model for Accelerated Cured Fly-Ash Based Concrete

  • Muhammad Adil Khan Department of Civil Engineering, The University of Lahore, Lahore, Pakistan.
  • Mahboob Ali Chowdhry Department of Civil Engineering, The University of Lahore, Lahore, Pakistan
  • Asjad Javed Department of Civil Engineering, The University of Lahore, Lahore, Pakistan.
  • Mohammad Laeeque Ahmed Department of Civil Engineering, The University of Lahore, Lahore, Pakistan
  • Hummaira Kanwal Department of Civil Engineering, The University of Lahore, Lahore, Pakistan

Abstract

The most important property of concrete is its compressive strength, which is carried out after 28-days proper curing of concrete. This test is affected by other factors like the condition of curing, water to cement ratio, method of transportation, handling of the concrete, extent of vibrations and quality of the ingredients of mix proportion. This research study is an attempt to develop a simple Mathematical equation also known as mathematical model, by using linear regression analysis to estimate the 28-day fc’ (Compressive Strength) of concrete from the test results carried out atearly age. This simple linear equation develops a relationship of 28.5 hours accelerated cured compressive strength with normal cured compressive strength after 28-days. These results show that most of the predicted values of compressive strength, calculated via equations, lies within permissible range difference for compressive strength achieved by experimental method, which is clear indication of credibility of the equations obtained for compressive strength at different age of concrete. The results showed that compressive strength of concrete increases with the increase in content of FA (Fly Ash) upto 30% replacement, and the compressive strength of the concrete starts decreasing beyond 30% FA substitution. This argument is totally in line with all the literature carried out for this research.

Published
Oct 1, 2019
How to Cite
KHAN, Muhammad Adil et al. Strength Prediction Model for Accelerated Cured Fly-Ash Based Concrete. Mehran University Research Journal of Engineering and Technology, [S.l.], v. 38, n. 4, p. 1057-1066, oct. 2019. ISSN 2413-7219. Available at: <http://publications.muet.edu.pk/index.php/muetrj/article/view/1251>. Date accessed: 20 oct. 2019.
This is an open Access Article published by Mehran University of Engineering and Technolgy, Jamshoro under CCBY 4.0 International License