Abstract
In this study, we estimated the time for strength development in concrete cured up to 56 days. Water-cement ratios adopted range from 0.44-0.57. Nonlinear regression analysis performed on each experimental data set produced Strength-Age (S-A) curves from which Duration-Strength (D-S) models were deduced to estimate approximate time in hours for a particular strength development. A quick reference table for soffit formwork striking time and removal of props was produced. The time to attain the characteristic strengths for C20, C25, C30 and, C35 concrete were 247.04 hours (10.3 days), 285.57 hours (11.90 days), 484.54 hours (20.20 days), 481.58 hours (20.10 days) and, 267.72 hours (11.16 days), 338.74 hours (14.11 days), 560.67 hours (23.36 days), 482.49 hours (20.10 days) for medium and high slump range respectively. Faster construction scheduling operations can be achieved by using lower water-cement ratios and higher grades of concrete. http://dx.doi.org/10.4314/njt.v35i1.1
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.