Proceedings Of The 2018 Annual Conference Of The School Of Engineering & Engineering Technology (SEET), The Federal University Of Technology, Akure, Nigeria, 17-19 July, 2018.

 Conferenceproceeding

 Investigation Into The Properties Of Concrete Containing Broken Ceramic Tiles And As Partial Replacement For Coarse Aggregate

 Ekundayo O. O. Alake O., Akinola V.O., Omoniyi E.O

 2018

This paper presents an experimental study to evaluate the suitability of waste broken ceramic tiles in concrete production. Concrete mixes were prepared at water-cement ratio of 0.65, broken waste ceramic tiles were used to replace the coarse aggregate at 0%, 5%, 10%, 15%, 20%, 25% and 100% using a mix ratio 1:2:4. A total of 270 cubes were cast, cured in water, tetraoxosulphate vi acid (H2S04) and trioxonitrate v acid (HN03) for 7 days, 14 days, 21 days and 28 days. The results of the test showed that the compressive strength of the concrete cubes increases with age but decreases with increasing percentage replacement of coarse aggregate with broken ceramic tiles, when the specimens was cured in water and in acidic solution. It was concluded that broken ceramic tile concrete cannot be used for structural elements such as column, slab, lintel, and beam but can be used for the construction of non-load bearing walls and partitions walls. The findings revealed that generally using waste broken ceramic tiles lead to enhancing the properties of concrete. 

 

 Conferenceproceeding

 Development Of Cement Mortar From Reusable Industrial By-products

 Aaron Joseph Ango; H.T. Kimeng; Mustapha Sani & O.O Ekundayo

 2016

The present work involves mixing a high ratio of reusable industrial by product from the steel making process, Ground Granulated Blast Furnace Slag (GGBFS) with ordinary Portland cement at a ratio of 75%:25% to produce cost effective, environmentally friendly, eco-efficient, yet mechanically and structurally viable cement. Activation of the steel by-product (GGBFS) was done with compounds of different alkalinity. Mortar molds developed were tested for Compressive Strength, Autogenous Drying Shrinkage, Conduction Calorimetry, Scanning Electron Microscopy (SEM), X-ray Diffractometry (XRD), and Porosity. Results obtained showed that a high ratio of GGBFS to Ordinary Portland Cement mixtures produced cement based products with low permeability, improved cementing results, improved workability, and excellent density control. 

 International Journal Of Advanced Research In Engineering

 Journal

 Temperature Effects On Glue Performance And Compressive Strength Of Glue Laminated Funtumia Africana

 Kimeng Henry Tata, Ekundayo Olurotimi Olusegun, Obuneme Godwin Okoli & Aaron Joseph Ango.

 2015

Abstract: The effect of varying temperatures was investigated on the integrity of glue line and compressive strength parallel to grain for glue laminated Funtumia Africana (Ire) timber laminated with polyvinyl acetate glue. The performance of the glue line was investigated over temperatures of 00C, 300C, 400C, 500C, 700C, and 1000C administered to test samples over a period of 4 hours. The strength values were computed at an average moisture content of 5.6%. A mean compressive strength of 34.4 N/mm2 was recorded at 0oC while a rise to 41.2N/mm2 was recorded for 30oC. However subsequent decreases in mean compressive strength were recorded with increasing temperature from 300C to 1000C. The highest and least mean compressive strength of 41.2N/mm2 and 24.4N/mm2 was recorded at 300 and 1000C respectively. The failure modes were similar over the various temperatures except for a brittle failure of both glue line and timber recorded at 0 oC due to extremely low temperature.

 

 Environ: Journal Of Environmental Studies, Faculty Of Environmental Design, Ahmadu Bello UNiversity, Zaria- Nigeria

 Journal

 An Investigation On The Effects Of Varying Temperature On A PVA Glued Lapped Joints, Using Obeche (Tripllochiton Scleroxylon) And Mahogany (Khaya Ivorensis)

 Kimeng H.T, Jamilu Yau And Olusegun Ekundayo Olurotimi

 2013

Timber is used for timber roofs and doors and windows in buildings. The traditional connections techniques make use of nails, bolts and screws, not much research has been carried out to examine the use of glue which provides a more aesthetically looking finish and also reduces the risks of splitting associated with the use of other connection techniques on most of the tropical hardwoods. in addition glue is considered to have very poor performance when it comes to temperature variation. This research therefore investigates the performance of glue lapped joints using mahogany and Obeche timber species at different lap lengths and also investigate the performance of these glued joints under temperature variations. Results obtained from the laboratory tests showed that mahogany had a higher failure load for various lap lengths than Obeche. This could be attributed to the difference in density. A linear relationship was obtained between the failure load and lap length. In addition it was noted that failure load reduced with increase in temperature although the increase was not significant up to temperatures of 50 oC. Failure patterns obtained during the tests showed that wood failure was more prominent than glue line failure thereby indicating that the glue line stresses are commensurate to that in the wood. 

 International Journal Of Advanced Research In Engineering

 Journal

 Feasibility Study Of The Use Of Groundnut Shells As Fine Aggregates In Light Weight Concrete Construction

 Kimeng Henry Tata, Olurotimi Olusegun Ekundayo,Mustapha Sani & Kigha Frederick

 2006

Issues bothering on sustainability in our society today have generated a lot of curious interest among researchers. The need to optimize the use of scarce resources, reduce cost of construction, and reduce environmental pollution has necessitated the research into many waste materials that pose a lot of threat to the environment. One of these waste materials is groundnut shell which is abundant in Northern Nigeria and which is normally left to rot and pose an environmental nuisance. This research therefore sought to use groundnut shell as a partial or full replacement as fine aggregate in light concrete panels with the ultimate aim of reducing the amount of these waste products in our environment and also indirectly increasing groundnut production if the research is successful. This is because farmers will not only sell the groundnuts but also will sell the waste products. 63 concrete samples were casted using groundnut shell replacements of 0%, 10%, 20%, 30%, 50%, 70%, 100% and tested for 7days, 14days and 28 days for compressive strength tests. The density of the various samples measured and swelling tests were also carried out. From the results of the laboratory tests the density of the cubes ranged from 830kg/m3 for cubes with only groundnut shells to 2160kg/m3 for cubes with only sand as fine aggregates. The average compressive strength range for 0% ground shell to 100% ground shell was 5.83N/mm2 to 0.9N/mm2 at 7 days, 8.07 to 0.5 N/mm2 at 14 days and 10 to 0.6 N/mm2 at 28 days while moisture absorption increased from 0.47 to 2.04%. The strength results indicate that groundnut shell panels cannot be used for structural purposes but will be suitable for non-load bearing partition walls. Replacements of 30 to 70% had suitable strength and can be used for this purpose. It is recommended that further research to be carried out to determine its acoustic and thermal properties