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. 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....
5. RELIABILITY ANALYSIS OF REINFORCED CONCRETE BRIDGE DECKS SUBJECT TO FATIGUE
Problem Statement
Deterioration of reinforced concrete bridge decks has been a major problem in the country. Both Federal Ministry of Works and Federal Roads Maintenance Agency records show that as at the year 2008, there were 1,696 Bridges that had been completed from year to year an...
6. 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...
7. 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...
8. 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...
9. EXPERIMENTAL INVESTIGATION OF THE FLEXURAL AND SHEAR CAPACITIES OF REINFORCED CONCRETE BEAMS ENHANCED WITH CARBON FIBRE REINFORCED POLYMER (CFRP) LAMINATES
ABSTRACT
In this research, experimental research was carried out to assess the flexural and shear capacities of RC beams strengthened with different amount of carbon fibre reinforced polymer laminates at the tension face and U-strips. Twelve rectangular RC beams of cross-sectional dimen...
10. OPTIMUM DESIGN OF THE THICKNESS OF CARBON FIBRE REINFORCED POLYMER MATERIAL (CFRP) REQUIRED FOR STRENGTHENING OF DEFICIENT REINFORCED CONCRETE BEAM
Abstract
A Carbon fiber-reinforced polymer (CFRP) has emerged as promising material for rehabilitation of existing reinforced concrete structures. However, one of the major concerns of using this material is its high cost. In this research, a classical optimization technique was employe...
11. RELIABILITY-BASED ANALYSIS OF COMPOSITE SOLID SLENDER TIMBER COLUMNS WITH ALUMINIUM LAMINATES USING SELECTED NIGERIAN TIMBER SPECIES
ABSTRACT
Four timber species (Strombosia pustulata, Macrocarpa biquertii, Entandrophragma cylindricum and Nauclea diderichii) were laminated with aluminium sheets of varying thicknesses.Axial and flexural loads were applied to the composite columns to determine their behaviour under suc...
12. 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...
13. 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...
14. EFFECT OF VERTICAL RECTANGULAR OPENINGS ON THE FLEXURAL STRENGTH OF REINFORCED CONCRETE BEAM
ABSTRACT
Effect of vertical rectangular openings on the flexural strength of reinforced concrete beam is presented. Twelve reinforced concrete beams of dimension 200m x 230mm x 700mm with different sizes of rectangular openings, 25mm x 35mm, 50mm x 60mm and 75mm x 85mm which are placed...
15. EVALUATION OF GEOLOGICAL MATERIALS WITH PLASTIC ADDITIVES FOR THE PRODUCTION OF DURABLE PAVEMENT BLOCKS: CASE STUDY OF OFFA, NORTH CENTRAL NIGERIA
ABSTRACT
The management of plastic waste (whose generation is on the increase) poses a great challenge to environmentalists owning to its non-biodegradability. The research project aims at using waste plastic materials as binding groundmass in place of cement thereby producing pavement...
