Article Sidebar
Article Details
Copyright belongs to the Faculty of Engineering, University of Nigeria, Nsukka, Nigeria
The contents of the articles are the sole opinion of the author(s) and not of NIJOTECH.
NIJOTECH allows open access for distribution of the published articles in any media so long as whole (not part) of articles are distributed.
A copyright and statement of originality documents will need to be filled out clearly and signed prior to publication of an accepted article. The Copyright form can be downloaded from https://www.nijotech.com/downloads/COPYRIGHT%20FORM.pdf while the Statement of Originality is in Statement of Originality.pdf (nijotech.com)
For articles that were developed from funded research, a clear acknowledgement of such support should be mentioned in the article with relevant references. Authors are expected to provide complete information on the sponsorship and intellectual property rights of the article together with all exceptions.
It is forbidden to publish the same research report in more than one journal.
Main Article Content
A Mathematical Model for Predicting the Flexural Strength Characteristics of Concrete Mixes Made with Granite Chippings
Abstract
Abakaliki, Ebonyi state of Nigeria produces most of the crushed-granite chippings used in the South-eastern part of the country. In this research work, these granite-chippings and fine aggregates from Amansea River in Anambra State of Nigeria were tested for their physical and mechanical properties based on BS 812: Parts 1&2:1975. Using these aggregates, sixty concrete beams of dimensions 600 mm X 150mm X 150 mm were made, cured and tested based on BS 1881:1983. Scheffe’s (4, 2) lattice polynomial with regression equation was used to develop a mathematical model for predicting the flexural strength characteristics of concretes made with these aggregates. The mathematical model developed was Ŷ = 4.28x1+ 4.42x2+ 3.4x3+ 2.71x4+ 0.2x1 x2 + 0.04x1 x3 – 0.14x1 x4 – 0.08x2 x3 – 0.3x2 x4+ 1.22x3 x4. Finally, the student’s t-test and the Fisher test were used to test the model’s validity.
