American Journal Of Engineering Research (AJER)

 Journal

 Development Of Suitable Cement Stabilized Clay Bricks From Oke-Adu Clay Soil Sample.

 Aiyewalehinmi, E.O And Oluyemi-Ayibiowu, B.D

 2019

This study examines the suitability of the locally produced cement stabilized clay bricks for both residential and commercial buildings in Akure Ondo State capital. The purpose of the study is to evaluate the suitability of a selected clay sample from Oke-Adu for the production of cement stabilised bricks. A total number of 60 Clay bricks stabilized with cement proportion of 5%, 10%, 15%,and 20%were produced in size of (150 x150 x150mm), observed for 7days, 14 days, 21days and 28days and the compressive strength determined. The results showed that all stabilized bricks were above the minimum compressive strength recommended by NIBBRI and NIS at all mix percentages with varying results between 2.00N/mm2 and 3.93N/mm2 )greater than the minimum 1.65N/mm2 recommended. The study recommends that 5% and 10% cement content are suitable for building construction purposes and can be affordable since the clay material is sufficiently available in Akure environment/ locality. 

 American Journal Of Engineering Research (AJER)

 Journal

 Risk Assessment In Building Construction Projects In Three Local Governments In Ondo State.

 Aiyewalehinmi, E.O And Oluyemi-Ayibiowu, B.

 2019

The purpose of this study is to identify and analyze various risk categories that are inherent in building construction projects in Ese-Odo, IIaje and Okitipupa south senatorial district of Ondo State. The Questionnaire used for the collection of risk information was based on relevant literatures reviewed. Seventy-seven (77) risk variables were identified and grouped into 10 risk groups ’factors. Seventy-two (72) questionnaires were administered randomly distributed to seventy-two (72) participants (27 qualified local government professional staffs and45 non-management employees). Completing the questionnaire, respondents were asked to use a five-point Likert scale ranging from: “not-important (1), important (2), average (3),very important (4),to highly important (5)”. Responses were analyzed using the terms of the Relative Important Index (R.I.I).From the analysis, the higher the R.I.I scores the highly important the risk factor. Scores above 60% are regarded as highly important and influential risk factors while scores below 60% are regarded as less important. 

 The International Journal Of Science & Technoledge

 Journal

 Strength Characteristics Of Lateritic Soil Stabilized With Terrasil.

 Oluyemi-Ayibiowu, B.D

 2019

NIL 

 The International Journal Of Science & Technoledge

 Journal

 Evaluation Of Permeability Characteristics Of Terrasil Stabilized Lateritic Soil

 Oluyemi-Ayibiowu, B.D

 2019

NIL 

 European International Journal Of Science And Technology

 Journal

 Assessment Of Polyvinyl Acetate As Stabilizing Agents For Some Nigerian Problem Soils.

 Oluyemi-Ayibiowu, B.D, Ola S.A, And Owolabi, A.O

 2016

Provision of good roads is an important key to the development of a nation and her economy. A good road network provides easy access to goods and services, and thus making lives of the inhabitants comfortable. The present hikes in prices of road materials in Nigeria have caused many of the roads in the country to be left uncatered for, and thus in states of disrepair. Therefore, the use of alternative suitable materials for road construction is paramount. This work is concerned with the use of polyvinyl acetate, to strengthen some Nigerian problem soils. Soil samples were collected from six locations within the country and their geotechnical properties at the natural and stabilized states evaluated. On mixing the soil samples with polyvinyl acetate, general improvement on the strength characteristics resulted. The CBR results showed that all the samples were improved from unsuitable subgrade or subbase materials to suitable base materials. With this, some of the unsuitable widely available soil materials in the country could be used for road works by stabilizing with this material and thus helping in the provision of good road networks in the areas where they exist. 

 European International Journal Of Science And Technology

 Journal

 Assessment Of The Engineering Characteristics Of Coarse Aggregates In Akure Township.

 (Oluyemi-Ayibiowu, B.D And Fadugba, O.G

 2016

This paper assesses the engineering characteristics of coarse aggregates used for construction works in Akure Township. Aggregates of different sizes where collected from three different quarry sites in Akure, Ondo State, Nigeria. The aggregates were then subjected to various tests in the laboratory in order todetermine their engineering characteristics. The tests carried out are Specific Gravity, Aggregate Impact Value (AIV), Aggregate Crushing Value (ACV), Flakiness Index (FI) and Elongation Index (EI) test. Some of these parameters were then used to determine the toughness indices. From the test results, all tested granite aggregates are of good quality with the ones from QUARRY C having the overall best result. QUARRY C aggregates have average aggregate impact value (AIV) of 15.5%, average crushing value (ACV) of 26.3% and an average specific gravity of 2.70. The flakiness and elongation indices are 20.8% and 19.5% respectively with overall toughness index being 97.5 indicating that the material is very good for road construction works. Aggregates from the other quarries are also suitable with average toughness index of 97.30. For tested local gravels, they exhibit low strength characteristics of 34.2% AIV, 28.3% ACV, S.G of 1.66, F.I of 27.2%, E.I of 21.2% and toughness index of 82.0, indicating that the material is of low strength and unsuitable for road works. 

 International Journal Of Scientific Research And Innovative Technology

 Journal

 Effect Of Cement On Asphalt-Emulsion Stabilized Lateritic Soils.

 Oluyemi-Ayibiowu, B.D

 2016

The influence of the physical characteristics and chemical compositions of three selected lateritic soils on their engineering behaviour in the natural untreated state and their response to treatment with asphalt emulsion mixed with cement in varied proportions was investigated in the laboratory. Asphalt emulsion, Colax A was added to the collected lateritic samples in their natural state and tested, after which small percentages of cement in varied proportions was used to modify the properties of the asphalt emulsion treated lateritic samples to evaluate the influence of cement and to determine the best mix ratio. Test results show that adding asphalt emulsion to the samples generally increase their strength, the rate of increase depending on the type of soil. Beneficial results were further obtained by adding small percentages of cement to the asphalt emulsion for treating all the soil samples especially the highly plastic soils which did not respond favourably with only the use of asphalt-emulsion, thus bringing to usefulness the technology of improving the strength of locally available weak soils by pre-treating the soil with small amounts of cement prior to the addition of asphalt-emulsion for increased strength characteristics. 

 Academia Arena

 Journal

 Strength Characteristics Of Lateritic Soils Stabilized With Locally Manufactured And Imported Hydrated Lime.

 Fadugba Olaolu,Oluyemi-Ayibiowu, B.D And Olowoselu A.S

 2015

This research evaluates the use of locally prepared lime to commercial (Imported) lime in stabilization of lateritic soil. limestone samples were collected from Three geographical location which are Ewekoro, Ogun state, Okpella, Edo state and Obajana, Kogi state of Nigeria. Lateritic soil was collected and subsequently stabilized with 3% and 6% of the various hydrated limes. The natural lateritic soil sample was subjected to preliminary tests (Natural moisture content, Specific gravity, Particle size analysis and atterberg’s limits), the result of the preliminary test classify the soil into an A-6 lateritic soil. Thereafter, the A-6 lateritic soil was stabilized with the locally prepared hydrated limes as well as a commercial (Imported) lime and the results of unconfined compression, CBR and optimum dry density compared. The locally prepared limes are not inferior to the imported lime as shown in the results of this research. 

 Academia Arena

 Journal

 Performance Characteristics Of Some Nigerian Problem Soils Stabilized With Ionic Stabilizer

 B.D OLUYEMI-AYIBIOWU

 2015

This work involves stabilization of some Nigerian problem soils with Ionic stabilizer for strength improvement. The work was carried out by collection of soil samples from six locations within Nigeria. The natural geotechnical properties of the collected samples were determined in the laboratory after which they were mixed with the soil materials and their response monitored by testing. The test carried out on both the natural and treated samples are classification which includes Atterberg limits, particle size distribution; and strength characteristics through compaction and California Bearing ratio determination. The soil materials tested are classified as A-2-6, A-3 and A-7-6 with natural California Bearing Ratio (CBR) values ranging from 7.7% to 32.5%, indicating weak subgrade to fair subbase materials. All the soil materials were naturally unsuitable for road bases. On stabilization, the plasticity indices of the soils were reduced considerably with remarkable improvement on compaction and strength characteristics. The CBR values increased from between 23.8% - 87%, giving a percentage increase by up to 325%. The unsuitable materials were thus improved to suitable base materials. 

 NIL

 Technical Papers

 Soil Investigation Of The Proposed Road Networks In Glazoue,

 Oluyemi –A, B. D

 2011

NIL