Alao Jimoh

• B.Eng. Civil ; M.Eng. Civil.; Ph.D. Civil; MNSE; COREN Nigeria
• University of Ilorin

This research work presents the application of guinea corn husk (GCH) and cow hair (CH) fibres as reinforcement in cement composite. The influence of the hybrid fibre volume on the flexural performance of the composite has been studied experimentally. The mechanical (flexural strength) and physical (density, water absorptivity, moisture content) ch...

The demand for timber is unlimited as it continues to increase rapidly in Nigeria. There is problem of undocumented properties of unpopular timber species used locally, especially in developing countries such as Nigeria. This research therefore aimed at characterizing and grading of three (3) less-used timber species in Nigeria for structural uses....

This paper reports on the flexural strength behaviour of Apa reinforced stabilized lateritic soil beams. The potential of using timber as a reinforcement material is because timber is abundant, cheap and locally available compared to conventional steel. Apa timber possess a tensile strength of 68.34 N/mm2. Experimental and Finite Element Analysis u...

Structural reliability was examined on the lesser-used species such as Arere (Triplochiton scleroxylon) and Emi (Vitellaria paradoxa) which can be good substitute to the well-known species. The strength and physical properties of these timber species were determined to predict the suitability of the species as structural material. Twenty lengths of...

Structural reliability was examined on the lesser-used timber species such as Akomu (Pycnanthus angolensis) and Eriri (Vitex doniana) which can be good substitute to the well-known species. The strength and physical properties of these timber species were determined to predict their suitability as structural material. Forty lengths of timber specie...

Ordinary Portland cement (OPC), the world most used binder in concrete production is adjudged a non - environmental friendly material due to the CO2 gas that is emitted into the atmosphere during its production process. Also, with the future generation in mind, limestone resource needs to be adequately preserved and managed. Previous studies on the...

The paper characterizes two potential timbers grown in Nigeria according to EN338 (2009) timber strength classification. The timbers namely Igba (Rhizophora racemosa) and Adere (Syzgium guineense) were obtained in Kwara state in the North-central part of Nigeria. Physical and Mechanical properties of timber species were obtained in accordance with...

This paper examines and present the findings of the physical and mechanical properties of concrete containing rice husk ash (RHA), and the blend of rice husk ash with calcium carbide waste (RHA-CCW). Concrete cubes, cylindrical and beam specimens containing different percentages of RHA and RHA-CCW by weight of cement (5, 10, 15 and 20 %) were cast....

Broad range of research works have been carried out over the past few years and these have resulted in comprehensive information on materials properties of various species of timber in Nigeria. There is still research gap to cover many useful but unpopular timber species, therefore this research work is meant at characterising two commonly used...

This paper is aimed at classifying three potential timbers grown in Nigeria using EN338 (2009) strength classification for structural size specimen. The timbers namely Vitex doniana, Ceiba pentandra and Pseudocedrela kotschyi were obtained in Ilorin, Kwara State of Nigeria. Physical and Mechanical properties of the selected timber species were dete...

This study was conducted to investigate the physical and mechanical properties of Bush mango (Irvingia gabonensis) timber specie using BS 5268 (2002) and NCP 2 (1973). Specimens used in the experiment were obtained from sawmills in Kwara State, North-central Nigeria in green condition. Samples were seasoned naturally for six months and prepared...

This research work examined the reliability of the Nigerian grown Iroko and Mahogany timber species as column materials. The strength and physical properties of these timber species were determined to predict the suitability of the species as a structural material. Forty lengths of timber species of 50mm x 50mm cross-section were purchased fro...

The use of local materials such as timber in structural buildings without loss of performance is very crucial to the growth of developing countries. There is a need for sufficient information on the structural viability and market accessibility of timber species of interest, to ensure adequate use of the timber as construction material. This study...

This paper investigated the reliability of the Structural-sized Afara and Babo timber species as column materials. The work centers on the compressive strength characteristics of Nigerian Afara (Terminalia superba) and Babo (Isoberlinia doka) timber column of nominal lengths 200, 400, 600 and 800 mm and a nominal width and thickness of 50 mm b...

The continuous depletion of lime stone deposits during cement production is increasingly posing a challenge in the construction industry. Other disadvantage associated with cement production includes CO 2 emission into the atmosphere and its negative effect on global warming. As a result, the research was geared towards at proffering alternatives t...

The disposal of Calcium carbide waste can lead to groundwater contamination via leaching. Also, the production of Portland is increasingly having an effect on global warming and the continuous depletion of limestone deposits. With the aim of minimizing the negative effects associated with the production of cement and disposal of calcium carbide was...

The work centers on the compressive strength characteristics of Nigerian Apa (Afzelia bipindensis) and Opon (Lannea schimperi) timber species columns of nominal lengths 200, 400, 600 and 800mm and a nominal width and thickness of 50mm by 50mm. The data revealed that, Apa and Opon have an average density of 652.74 and 472.60kg/m 3 respectively. The...

Strength grading of timber offers a number of advantages both to the designer and the supplier of timber. This study reveals characterization and grading of Nigerian grown Eku (Brachystegia eurycoma) timber using BS 5268 (2002). Specimens used in the experiment were obtained from sawmills in Kwara State, Nigeria. The samples were seasoned naturally...

This study investigated the physical and mechanical properties of Shea Tree timber (V. paradoxa) for structural use obtained at different areas of Kwara State, Nigeria. Physical properties of the samples like moisture content, specific gravity and density was evaluated and the mechanical tests were tensile strength, modulus of rupture, modulus of e...

This paper is aimed at the characterisation and grading of five potential timber species grown in Nigeria using EN338 (2009) strength classification for Eurocode 5 timber design. The timber species namely Rhizophora racemosa, Syzgium guineense, Vitex doniana,Ceiba pentandra and Pseudocedrela kotschyi were obtained in Kwara state in the North-centra...

The purpose of this paper is to perform a structural optimisation of a flat thermoplastic plate (tile). This task is developed computationally through the interface between an optimisation algorithm and the finite element method with the goal of minimising the equivalent stress with a specified target stress of 2 MPa when applied with a load intens...

This study investigates the physical and mechanical properties of two timber species for structural use. Three logs of each specie were obtained at different areas of Kwara State, of Nigeria which is located north in the periphery of the south-western rain forest area, sliced into 2” by 12” size before seasoning naturally and their structural/stren...

This study investigated the physical and mechanical properties of two Nigerian timber species-Azadirachta indica and Xylopia aethiopica for structural use. Three logs of each species were obtained at different locations of the country, seasoned naturally and their structural strength properties were determined and converted to strength at moisture...

This research illustrates and compares the analytical and behaviour of recycled waste plastic tiles and a conventional alumina ceramic tile. The melting point adopted for all waste plastic material was 60 o C with a controlled cooling temperature method. The flexural strength and compression strength of the various plastic type used were conducted...

Cases of building collapse in Nigeria has been on the increase since the turn of the millennium. Yet, it has been observed that most of these buildings do not just give way and fail; they first show symptoms of distresses in the form of defects. It can be said that defects in buildings constitute undesirable challenges and threats to users. Thus, i...

The production of cement, one of the major binders in the construction industry has adverse effect on the environment, contributes to global warming, and leads to depletion of limestone. On the other hand, burning of Brewer dry grain (BDG) in the open pollutes the atmosphere with attendant health consequences. To overcome the adverse effect associa...

An attempt is made in this paper to present a guideline to produce laterite cement bricks meeting a user-defined requirement. Using the Central Composite Design (CCD) of the Response Surface Methodology of experimental design, a response prediction for a three component mixture for building bricks production using water, cement and laterite with pe...

The production of cement, one of the major binders in the construction industry has adverse effect on the environment, contributes to global warming, and leads to depletion of limestone. On the other hand, burning of Brewer dry grain (BDG) in the open pollutes the atmosphere with attendant health consequences. To overcome the adverse effect asso...

The quest for production of cheap construction cementing material from agricultural wastes, particularly the ones with high silica content, formed the basis of this study. The process of determining the silicious material and silica content was carried out on two agricultural waste husk types, the Rice (Oryza sativa)husk and Guinea corn(Sorghum bic...

Cases of building collapse in Nigeria has been on the increase since the turn of the millennium. Yet, it has been observed that most of these buildings do not just give way and fail; they first show symptoms of distresses in the form of defects. It can be said that defects in buildings constitute undesirable challenges and threats to users. Thus, i...

The production of cement, one of the major binders in the construction industry has adverse effect on the environment, contributes to global warming, and leads to depletion of limestone. On the other hand, burning of Brewer dry grain (BDG) in the open pollutes the atmosphere with attendant health consequences. To overcome the adverse effect associa...

Experimental tests were carried out on Apa (Afzelia bipindensis) to ascertain its structural performance. Timber is one of the most frequently used building materials in the construction industry due to its environmentally friendly nature and low handling cost but there is insufficient information on the structural behaviour of most timber species....

The permeability and strength of pervious concrete depend on the particle sizes and proportions of the constituent materials of which the concrete is made of. In this paper, structural property and permeability of pervious concrete made with different coarse aggregate sizes is presented. For the different aggregate/cement ratio used in this study,...

The permeability and strength of pervious concrete depend on the particle sizes and proportions of the constituent materials of which the concrete is made of. In this paper, structural property and permeability of pervious concrete made with different coarse aggregate sizes is presented. For the different aggregate/cement ratio used in this study,...

This study highlights the use of plastered straw bale as a load bearing element, its method of construction and specification required to obtain maximum benefits from the use of this material. Critical Path Analysis (CPA) was used in formulating, scheduling and managing the various milestones or activities in the construction of a plastered straw b...

Design equations for determining ultimate loading capacity of Ayin timber beam have been developed based on the ultimate tensile and compressive stresses, instead of modulus of rupture, which has been the usual practice. The axial stress-stain equations in tension and compression were converted to flexural stress and neutral axis depth relationship...

A procedure for designing axially loaded Ayin ( Anogeissus leiocarpus ) wood column or strut has been investigated. Instead of the usual categorization of columns into short, intermediate and slender according to the value of slenderness ratio, a continuous column formula representing the three categories was derived. To apply the formula, experime...

This study investigates the effects of aggregate sizes on the physical and mechanical properties of structural concrete, using artificial aggregates, in order to determine the aggregate size or combination of sizes that will improve the properties of structural concrete. Four categories of coarse aggregates sizes were considered: sample A (those th...

Review of research works indicate that 40 trees are required to build a good size wood frame house which is much, and leads to increase in global deforestation and reduction in wood resource. Tree takes longer time to grow to maturity, it is costly, and embargo placed on felling in natural forests necessitates need for excellent alternative. Experi...