1. EFFECTS OF AGGREGATE SIZES ON THE CONCRETE STRENGTH
It is well recognized that coarse aggregate plays an important role in concrete. Coarse aggregate typically occupies over one-third of the volume of concrete, and research indicates that changes in coarse aggregate can change the strength and fracture properties of concrete. To predict the behavi...
2. COMPARATIVE ANALYSIS OF THE STRENGTH OF CONCRETE MADE FROM VARIOUS AGGREGATE
EXCERPT FROM THE STUDY
Characteristics of soil-cement blocks using highly sandy laterite mixtures were examined. The compressive, flexural and direct tensile strength of soil-cement blocks are directly proportional to the concrete aggregates, while the IRA is inversely...
3. EVALUATION ON THE IMPACT OF AGGREGATE SIZES ON CONCRETE STRENGTH
INTRODUCTION
It is common knowledge that coarse aggregate is crucial to the success of concrete. According to studies, changes in coarse aggregate can alter the strength and fracture qualities of concrete. Coarse aggregate generally makes up over one-third of the volume...
4. EFFECT OF MIX RATIO AND CURING WATER ON THE COMPRESSIVE STRENGTH OF OIL PALM SHELL (OPS) AGGREGATE CONCRETE
ABSTRACT
In this study, the compressive strengths and Modulus of elasticity of lightweight Concrete with oil palm shells as partial replacement of coarse aggregate was presented. The different types of mixing water were used, namely, cl...
5. A STUDY ON THE MODIFICATION, CHARACTERISATION AND APPLICATION OF COCONUT WASTES AS FILLERS IN RUBBER COMPOUNDING
ABSTRACT
In this study, coconut palm wastes were obtained, washed to remove sands and debris and then dried at 95oC for 1 hr to remove surface moisture. Filler modifications through carbonisation were done at varying temperatures of 300oC, 400oC, 500oC, 600oC and 700oC....
6. PERFORMANCE EVALUATION OF DIFFERENT MATERIALS AS CHILLS IN SAND CASTING OF ALUMINIUM ALLOY
ABSTRACT
This study has evaluated the effectiveness of metallic materials as chill in sand casting of aluminium alloy. Four plates of dimension 165mm x 80mm x10mm were cast using sand mould. Steel, copper and brass chills in form of cylindrical bar of g...
7. DEVELOPMENT AND CHARACTERISATION OF EPOXY/BORASSUS PALM (Borassus aethiopum Mart.) LEAF STALKFIBRE REINFORCED COMPOSITE
Excerpt from the Study
This work was aimed at developing and characterising epoxy/BPLSF reinforced composite by hand lay-up method.At the end of the study, the following conclusions were made.
i. Characterisation of untreated and treated fibre confirmed the et...
8. DEVELOPMENT OF BAOBAB/SISAL REINFORCED LOW DENSITY POLYETHYLENE HYBRID COMPOSITE
Abstract
In this work, the properties of baobab/sisal fibre reinforced low density polyethylene hybrid composites were studied. The effect of fibre loading and fibre treatment with varying sodium hydroxide (NaOH)concentration on the composite properties was investigated...
9. EFFECTS OF FIBRE HYBRIDIZATION ON THE PROPERTIES OF NATURAL FIBRE FILLED EPOXY COMPOSITES
ABSTRACT
The problems of low mechanical properties of composites reinforced with fibres of natural origin have been a source of concern for researchers. Also, the insufficient utilization of bagasse fibres due to its moderate strength has further reduced its potentialities in composite...
10. EFFECT OF DATE SEED POWDER FILLER ON PROPERTIES OF HIGH-DENSITY POLYETHYLENE
ABSTRACT
High-density polyethylene composites of date seed powder were prepared at filler loadings of 0 to 40wt%. The particle sizes of the date seed powder investigated were 72, 125, 150 and 180µm. Calcium carbonate was used as a reference filler. The high- density polyethylene c...
11. INFLUENCE OF TIG PROCESS PARAMETERS ON HARDNESS, TENSILE STRENGTH AND MICROSTRUCTURES OF AISI430 FERRITIC STAINLESS STEEL WELDS
ABSTRACT
The influence of tungsten inert gas (TIG) welding process parameters on the microstructural features and mechanical properties (hardness and tensile strength) of AISI430 ferritic stainless steel (FSS) weldsbased on the central composite design (CCD) approach, was investigated....
12. PERFORMANCE EVALUATION OF DIFFERENT MATERIALS AS CHILLS IN SAND CASTING OF ALUMINIUM ALLOY
ABSTRACT
This study has evaluated the effectiveness of metallic materials as chill in sand casting of aluminium alloy. Four plates of dimension 165mm x 80mm x10mm were cast using sand mould. Steel, copper and brass chills in form of cylindrical bar of geometry 7mm in diameter and 50mm l...
13. SUITABILITY OF OSARA AND JAMATA RIVER SAND DEPOSITS FOR MOULDING OPERATION
ABSTRACT
This research was carried out to ascertain the suitability of Osara and Jamata River sand for moulding operation and Ajaokuta Foundry Sand was also tested along with the two sands under the same condition and their moulding properties were compared with that of American Foundry...
14. SYNTHESIS, FORMULATION AND CHARACTERIZATION OF PHENOL FORMALDEHYDE/CHITOSAN COMPOSITES
Abstract
The methodology of the experiment involves three main stages. The first part describes the synthesis of the PF (novolac) resins. Novolac (resins) were prepared with an excess of phenol over formaldehyde under acidic conditions. PF molar ratio were varied from 1P:2F to 1P:8F. Th...
15. THE DEVELOPMENT OF Al-5%Cu/GRAPHITE PARTICULATE COMPOSITES FOR ENGINEERING APPLICATIONS
ABSTRACT
A method of preparing cast aluminium alloy – graphite particulate composite using uncoated graphite with the addition of 1wt% magnesium to aid wettability was studied. The method consists of introducing and dispersing uncoated but pre-treated graphite particles in alumini...
16. DESIGN AND DEVELOPMENT OF A STARCH-BASED MULTIFUNCTIONAL EXCIPIENT (STARGELASIL) FOR TABLET FORMULATION
ABSTRACT
The concept of co-processing as a particle engineering technique has been used as a tool to improve the functionality of many existing excipients. This study was designed to improve the functionality of cassava starch as excipient for direct compression by coprocessing with gel...
17. EVALUATION OF MODIFIED STARCHES AND MUCILAGE DISPERSIONS OBTAINED FROM IPOMOEA BATATAS L. LAM (CONVOLVULACEAE) AS BULK EXCIPIENTS IN CHEWABLE TABLET FORMULATIONS
ABSTRACT
Increasing attention has been paid to incorporating hydrocolloids into starch-based products due to their unique functional properties and bio-safety. The aim of this work was to determine the suitability of modified starch and mucilage dispersions obtained from Ipomoea batatas...
18. EVALUATION OF TABLETING PROPERTIES OF NATIVE AND MODIFIED STARCHES, DERIVED FROM SOLENOSTEMON ROTUNDIFOLIUS, AS TABLET BINDER AND DISINTEGRANT
ABSTRACT
The aim of this research was to study the tableting properties of Solenostemon rotundifolius starch (SRS) and modified forms for use as pharmaceutical excipient by wet granulation method of tablet production in paracetamol formulation. The physicochemical properties of native a...
19. DEVELOPMENT AND EVALUATION OF A CO-PROCESSED EXCIPIENT FROM ACID HYDROLYZED CASSAVA STARCH, GELATIN AND LACTOSE (STARGELAC) IN TABLET FORMULATIONS
ABSTRACT
Co-processed excipients are a mixture of two or more existing excipients at subparticle level. These multipurpose excipients have significantly reduced the number of incorporating excipients in the tablet. The aim of this work is to design and prepare a coprocessed excipient fr...
20. FORMULATION STUDIES OF ACACIA SIEBERIANA GUM IN CHOROQUINE AND METRONIDAZOLE MATRIX TABLETS
ABSTRACT
The crude plant gum from African Acacia sieberiana was purified and investigated for use as a matrix excipient for chloroquine phosphate and metronidazole tablet formulations. The chromatographic analysis of the acid hydrolysed gum revealed the presence of rhamnose, galactose,...
21. AN INVESTIGATION INTO QUALITY OF AGGREGATE IN ROAD CONSTRUCTION
ABSTRACT
The current extensive use of low quality aggregate in Nigerian road for engineering applications is of concern because they appear to be a level of ignorance surrounding their existing properties and implications. This project was conceived for the purpose of c...
22. ASSESSMENT OF THE IMPACT RESISTANCE BEHAVIOUR OF RHA BASED KENAF FIBROUS CONCRETE
ABSTRACT
Waste materials utilization is one of the central concerns of waste management approaches in recent years. The developments in cement and concrete technology towards the production of sustainable concrete by using waste materials and cellulosic fibre is gradually attaining acce...
23. CHARACTERISATION OF RECYCLED STEEL IN NIGERIA FOR QUALITY ASSESSMENT
ABSTRACT
The chemical and mechanical properties of recycled mild steel from scraps in Nigeria was investigated using the mechanical (strength of materials) testing approach, chemical (elemental composition) testing approach and metallurgical (microstructural analysis) testing approach m...
24. DEVELOPMENT OF CAR PISTON MATERIAL FROM ALUMINIUM ALLOY USING COCONUT SHELL ASH AS AN ADDITIVE
ABSTRACT
This research presents the development of a piston material from aluminium alloy using coconut shell ash as an additive. Most damage pistons reported in literature are as a result mechanical fatigue due to wear and thermal fatigue. Investigations revealed that aluminium alloys...
25. EFFECT OF GLYCEROL AND SHEA BUTTER ON THE PROPERTIES OF FILMS PRODUCED FROM CHITOSAN AND Borassus aethiopum STARCH COMPOSITES
ABSTRACT
The concern in environmental waste management and toxicity of petroleum derived plastics has led to the search for renewable, nontoxic and biodegradable materials for packaging. Starch is the most studied and promising biopolymer for the production of biodegradable films, but t...
26. EVALUATION OF THE MECHANICAL PROPERTIES OF KENAF BIO FIBROUS CONCRETE COMPOSITES CONTAINING SORGHUM HUSK ASH
Statement of the Research Problem
The growth in global population and income in the twenty-first century has increased the need for sustainable materials. These requirements occur as a result of landfills piling up due to massive depositions of accumulated garbage, the earth's envir...
27. COMPUTER SIMULATION OF HEAT TREATMENT PROCESS FOR ALUMINIUM ALLOY
ABSTRACT
Temperature of aluminium alloy is simulated using MATLAB programming language for annealing, soaking to have uniformity of microstructure and quenching treatment processes. Workpiece selected for the study was aluminum alloy 6061-O, T1, T4 and T6 of different shapes: plate, cyl...
28. THE PHYSICO-MECHANICAL AND MORPHOLOGICAL PROPERTIES OF -CELLULOSE-FILLED POLYSTYRENE (PS) AND POLYVINYL ACETATE (PVAc) BLENDS
ABSTRACT
Studies of physico-mechanical and morphological properties of pure and -cellulose reinforced blends of polystyrene (PS) and poly (vinyl acetate) (PVAc) are reported in this work. The compression moulded articles of the blends of different compositions (10:90, 20:80, 30:70, 40:...
29. CHARACTERISTICS OF SOME HYDROLYTIC ENZYMES AND BIOPULPING POTENTIAL OF FUNGAL ISOLATES FROM SELECTED WOOD SAMPLES IN SOUTHWESTERN NIGERIA
Abstract
Pulping industry is both labour and energy intensive but in Nigeria, electricity supply is unstable. This has contributed to the near collapse of the Nigerian paper and pulp industry despite the rich forest resources in southwestern Nigeria. Use of alternative energy sources su...
