Abiodun Yetunde

• Ph.D.; M.Sc.; B.Eng.
• Lecturer at University of Lagos

This paper investigates the effects of the partial replacement of cement with metakaolin (MK) on the strength of hollow sandcrete blocks. Hollow sandcrete blocks of size 150 mm × 225 mm × 450 mm were produced using a mix of ratio 1:6 (binder: sand) and cured for 7, 28, 45, and 60 days. For the actual test, the cement was partially replaced with 0–2...

The use of agricultural by-products, such as Rice Husk Ash (RHA), in concrete production has gained significant attention as a sustainable alternative to traditional construction materials. This study aims to evaluate and compare the effects of Nano-Rice Husk Ash (NRHA) and Micro-Rice Husk Ash (MRHA) on the compressive strength of concrete. Concret...

The production of particleboards without the use of synthetic binders is desirable to prevent environmental problems. This study has produced experimental binderless boards from untreated sawdust from Abura wood using a laboratory press. Response Surface Methodology using Box-Behnken experimental design was utilized to investigate the influenceof p...

The incorporation of pozzolanic materials in concrete construction is progressively increasing. This is due to technological advancement and climate change problems associated with carbon emissions resulting from the large-scale manufacturing of cement and its usage for concrete production. In this study, metakaolin obtained was used to partially s...

There are environmental concerns on the use of synthetic binders for the production of particle boards. This has stimulated interest in developing boards which do not require the use of these binders but derive adhesion from the activation of the natural chemical constituents of the materials used in manufacture of the boards. Due to the complex na...

Carbon fibers (CFs) are made mostly from a non-environmentally friendly polyacrylonitrile (PAN) and little from rayon. PAN-based CFs, require huge amount of energy for its production aside its contributions to the global CO2 emission. Therefore, there is recourse to a more environmentally friendly sources of CFs biomass. Recently lignin has been re...

Cement production is one of the most important industries on the planet, and humans have relied on is use dating back to the dawn of civilization. Cement manufacturing has increased at an exponential rate, reaching 3 billion metric tons in 2015, representing a 6.3% annual growth rate and accounting for around 5–8% of global carbon dioxide (CO2) emi...

One of the most commonly used pad foundation types is the square footing, however, there is a necessity to compare its performance and economy with the circular pad foundation which is not often considered. This study focuses on the suitability of the square versus circular isolated pad foundation types in cohesionless soils, from a geotechnical, s...

Sulphate attack is a major threat to any concrete structure. While the environment of the concrete structure could aggravate the attack, material constituent also plays significant role to either permit or resist the attack. In this paper, sulphate resistance potential of selected cement brands in Nigeria was investigated. The cement brands studied...

The increasing cost of cement and CO2 gas emissions associated with its usage and production has led to the search for an alternative binder for sustainable environment. This research examines the mechanical performance of palm oil fuel ash (POFA) as binder in concrete for sustainable construction. Ninety (90 Nos) cubes (150 mm), Ninety (90 Nos) cy...

The use of cement contributes to global CO2 emission and this leads to the depletion of ozone layer,causing global warming. The quest to reduce or eliminate this problem has resulted in the discovery of metakaolin-based geopolymer as an alternative to the use of cement in construction work. In this study, metakaolin obtainedas a result of kaolin ca...

A major source of environmental burden in construction industries is concrete waste because its generation and accumulation start from the time fresh concrete are produced on-site or off-site till its hardens. This made concrete the largest portion of solid waste stream by weight in the construction industries. Recycling of these waste materials in...

Over time, various methods have been used to generate mathematical models that can estimate values from a set of two independent variable Civil Engineering data. However, most common modelling techniques may be quite cumbersome to use except with the aid of a special modelling software. This research study focuses on the development of a mathematic...