https://laujet.com/index.php/laujet <p>LAUTECH Journal of Engineering and Technology (LAUJET) is a leading internationally referred journal in the fields of science, engineering and technology. It is a journal founded by academicians, educationists with substantive experience in industry. The journal is an online open access journal with a yearly print version of its volumes/issues made available to interested persons/institutions. The basic aim of the journal is to promote innovative ideas in fields relating to the sciences, engineering and technology. The basic notion of having a wide area of focus is to encourage multidisciplinary research efforts and seamless integration of diverse ideas that might be gleaned from the papers published in the journal.</p> <p>&nbsp;</p> Faculty of Engineering and Technology, Ladoke Akintola University of Technology, Ogbomoso, Nigeria en-US LAUTECH Journal of Engineering and Technology 1597-0000 https://laujet.com/index.php/laujet/article/view/368 <p>Electrocoagulation has been employed as a treatment technique for treating various wastewaters. This study focuses on the performance of the electrocoagulation process for the treatment of rubber latex wastewater (RW) using Aluminum-Aluminum (AL-AL) and Aluminum-Carbon (AL-C) electrodes. Rubber latex wastewater (RW) was obtained locally from the plastic industry in Araromi-Obu, Ondo State of Nigeria with an initial concentration of 7.30, 28°C, 65.53mg/L and 785.23mg/L for pH, Temperature, BOD, and COD respectively and subjected to electrocoagulation using (AL-AL) and (AL-C) electrodes. Effects of electrocoagulation time and electrode types were studied and achieved under the following initial conditions of 30V, current density of 15mA, inter-distance electrodes of 1.5cm. The results revealed that this process could reduce the concentration of BOD, COD and Lead in RW. The highest removal efficiencies of 98.74% and 98.47% (COD); 82.02% and 79.12 (BOD); 90% and 83.33% (Lead), were obtained for AL-AL and AL-C electrodes respectively. From this study, it can be concluded that electrocoagulation is effective in the treatment of RW. It is recommended that Rubber producing industries could adopt this treatment method to treat their wastewater rather than disposal into the environment without treatment.</p> <p>&nbsp;</p> E. O. Fakorede J. R. Adewumi ##submission.copyrightStatement## www.laujet.com 2020-08-21 2020-08-21 14 2 1 9 https://laujet.com/index.php/laujet/article/view/370 <p>In pursuit of producing a sustainable and durable concrete composite, there is need to incorporate some supplementary cementitious materials to modify its conventional properties. Several works have been done on the utilization of agricultural and industrial wastes as pozzolans in concrete. However, there are some naturally occurring materials that also exhibit additional binding tendency that are yet to be explored. Cement being a conventional binder in concreting undergoes hydration reaction producing lime as one of its by-products. This causes expansion thereby predisposing the composite to disintegration and hence, untimely failure. Pozzolans have the tendency of forming additional binding property when in contact with this lime in the presence of water. Lot of research has been carried out on its properties and effects in concrete. However, there have been disparities in the optimum percentage replacement of various pozzolans in concrete. This article focuses on previous findings on the utilization of pozzolans in concrete and its prospects in the</p> S. O. Odeyemi B. A. Ibitoye R. Abdulwahab M. S. Sholagberu ##submission.copyrightStatement## laujet 2020-11-21 2020-11-21 14 2 10 24