Abstract This research assessed the structural characteristics and quality of reinforced concrete primary materials which are cements, aggregates (fine and coarse) and reinforcing steel used in concrete works in Lagos State with a view to determining the extent to which they conform with the requirements of relevant standards. This is achieved by using relevant laboratory procedures to determine their physical, mechanical, chemical and microstructural properties and compare them with the rel...
ABSTRACT One of the ways to increase the strength properties of concrete is adding fibre material into the concrete. While to reduce a noise in construction project, a self compacting concrete was a good choice in the project. This thesis presents a study into the strength properties of self compacting beam concrete using plantain bunch fibre. Mix proportion of 1:1.82:1.27with different fractions of fibre namely: 0.00%, 0.25%, 0.50% and 0.75% by weight of cement with water cement ratio ...
ABSTRACT The quality of building materials has been documented to be one of the causes of building collapse all over the world. An experimental study was conducted to determine the effect of fines (clay/silt) content in sand and water-to-cement ratio on the workability, compressive strength, tensile strength and flexural strength of concrete. A total of 270 specimens were cast and tested with varying fines content in sand of 2%, 4%, 6%, 8%, 10% and 12%; and variable water-to-cement rat...
This paper discusses the recent investigation into the composite action of pultruded Fibre Reinforced Polymer (FRP) and concrete hybrid systems, under static push-out tests. The study sought to experimentally determine the characteristic load-slip behaviour of the FRP-concrete composites under varying shear stud arrangements and failures modes associated with the variations and the push-out load capacity. For the initial tests, three composite test specimens were fabricated using FRP wide fla...
ABSTRACT As the prices of building materials in the country continue to increase sharply, there is growing need to source local materials as alternative for farm building constructions. This project investigates the performance of a cylindrical shell built of laterized concrete for storage of foodgrains or water. L In order to optimize the mix ratio of the constituent materials that will produce maximum strength, a mathematical model which relates the strength of laterized concrete and its ...
Abstract The term Geopolymer was introduced to represent the mineral polymers resulting from geochemistry. The process involves a chemical reaction under highly alkaline conditions on Si-Al minerals, yielding polymeric Si-O-Al-O bonds in amorphous form. The actual compressive strength of the concrete depends on various parameters such as the ratio of the activator solution to fly ash, molarity of the alkaline solution, ratio of the activator chemicals, curing temperature etc. In recent years,...
Some industrial equipment such as electric tranformers and capacitors are located in vaults and substations on flat concrete surfaces. Due to accidents, normal routine maintenance, or replacements, this equipment may spill oil that may contain PCBs on these surfaces. These spills must be cleaned up in accordance with United States Environmental Protection Agency's (USEPA) guidelines. Current cleanup operations are abiotic in nature, encompassing both physical and chemical methods. These metho...
ABSTRACT This project is based on the results of candidates who sat for the Senior Secondary School Certificate Examination (SSSCE) conducted by the West Mrican Examinations Council (WAEC). The main objective of this project is to determine whether performance in SSSCE core subjects namely Core Mathematics, Integrated Science, English Language and Social Studies for the five-year period from 2001 to 2005 depended on sex. The data were obtained from the West African Examinations Council-for th...
ABSTRACT This research work is carried out to determine the availability and the effective utilization of Chemistry laboratory equipment on students’ academic performance in secondary school. The study was guided by two objectives, two research questions and one hypothesis was tested at 0.05 level of significance. Survey research design was used in this study. Simple random sampling technique was used to select the sample size of 120 students from three private schools within Maiduguri Met...
ABSTRACT Ghana Research Reactor-1 core is to be converted from Highly Enrich Uranium (HEU) fuel to Low Enriched Uranium (LEU) fuel in the near future; a storage cask will be needed to store the HEU fuel. Notwithstanding the core conversion process, it is also important for the facility to have a storage cask ready when the fuel is finally spent to temporarily store the fuel until permanent storage is provided. Winfrith Improved Multigroup Scheme-Argonne National Laboratory (WIMS-ANL), REactor...
ABSTRACT The research examined the integration and participation of the elderly in the socio-economic development of Harare Metropolitan Province (HMP). It targeted religious denominations, industry and commerce, non-governmental organizations, tertiary institutions, state enterprises and parastatals and a local authority. The research identified serious stigmatization of Old Persons (OPs), leading to their ostracism by HMP institutions in particular, and ordinary citizens in general. The les...
Abstract The teaching of mathematics has been viewed classically at all onsets and specific patterns of work teaching methodologies versus the consequent content analysis have been invaluably developed at various research phases. The study looks critically at mathematics as a subject and its relative relevance within the performance environment and it entrenches the whole concept of the same to further evaluation. Study after study has at all time given us concrete evidence of the concept of ...
A feasibility study of a conceptual nuclear design of a facility capable of producing high thermal neutron fluxes using isotopic neutron sources in a multiplying medium was carried out. The one-dimensional multigroup neutron diffusion equation was solved using the finite difference technique. A computer code SUNDES was written in FORTRAN 77 programming language and used to study the effect of reflectors, shielding materials and strength of isotopic neutron sources on the production lev...
ABSTRACT Street food vendors make a significant contribution to the lives of the impoverished in the society and the economy at large. However, it seems the sector has become stagnant in growth and expansion. A large number of street food vendors have been operating in the same place for numerous years with no concrete progress. This reason influenced the choice of my thesis topic so that the problem can be investigated and appropriate measures taken to help boost the sector. The research stu...
ABSTRACT This research is based on the results of Senior Secondary School Certificate Examination (SSSCE) released by the West African Examinations Council in elective and core subjects of study at Potsin T. I. Ahmadiyya Secondary School from 2000 to 2003. The elective programmes of study are General Arts, Business, Home Economics and Technical subjects. The data also includes the gender and religious affiliation of candidates. The main objective of the study is to identify variables that sig...