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
Predicting the Compressive Strength of Obudu Earth Blocks Stabilized with Cement Kiln Dust
Abstract
The study investigates the effect of Cement Kiln Dust (CKD) on the Compressive Strength of Obudu Earth Blocks. The soil used for the blocks was classified as A -7-6 (0) or CH. CKD content of up to 20% by weight of the dry soil was used to evaluate the Compressive strength of the blocks at 12%, 16% and ,20% water content by dry weight of the CKD-Soil matrix. 150 mm x 150 mm stabilized cubes moulded at various CKD and water content were cured and crushed at 7, 14, and 28 days. The study found that the compressive strength of CKD-soil block was about twice and half higher than that of the unstabilized block, and exceeded the minimum strength of 2.0 N/mm2 recommended by “ASTMD1633-00” or 2.8 N/mm2 of “BS 6073”. The Compressive strength of the earth blocks generally increased with increase in CKD content and curing period. The curing condition was also found to affect the strength of CKD-earth blocks, and 35% reduction in strength was observed with direct sun light curing. Scheffe’s optimization models were used to predict the compressive strengths of the CKD-soil blocks at varying proportions of CKD. It was concluded that CKD can be used as a good stabilizing agent for the Obudu earth blocks.
