ABSTRACT The work has gone a long way in determining strength of concrete made of various aggregates such as granites stone, black gravel, washed gravel and surface gravel. Some factors such as porosity of the aggregate temperature coursing lose of water plate form for mixing of concrete mix affect the workability and eventually the strength of concrete. This project work consist of using hydraulic machine to carryout the compressive test of the strength of concrete made of the earlier ment...
The strength performance of UHPFRC with micro and hooked-ends steel fibers was studied in this paper using Finite Element (FE) modelling and simulation. The specimens were modelled in geometry, material, constraints, load and boundary conditions using ABAQUS package and dynamic explicit analysis was used to to investigate the crack pattern, failure mode and stress-stain behaviour of the UHPFRC specimens when subjected to uniaxial compression and tension loading. Results from the FE simulation...
Abstract Ethiopia’sconstructionindustryisaggressivelyexpandingthaneverbefore.Cementisthemostessentialandexpensivematerialin thisregard.Cementtakes10%–15%byvolumeofconcrete.Nowadays,theconstructionindustryischallengedbythescarcityof cementandpriceescalationofthecementmarket.However,scholarstrytoreplacecementwithpozzolanicmaterial.Besidesthis, theyinvestigatedthatbambooleafashpossessespozzolanicproperties.Ethiopiahasabout850,000hectaresoflowlandbamboo,soitisgoodtoutilizebambooleafashasarepl...
ABSTRACT Fertilizer application in earthen ponds has been used as a low cost method of sustainable aquaculture production.
ABSTRACT Nigeria is the highest producer of cassava in the world and cassava juice is rich in hydrocyanic acid, a by-product from the extraction process.
Some people think they can be good preachers because they know what ought to be said, but they pay no attention to how it should be said, that is, the concrete way of constructing a sermon. They complain when people do not listen to or appreciate them, but perhaps they have never taken the trouble to find the proper way of presenting their message. It should be noted that 'the obvious importance of the content of evangelization must not overshadow the importance of its ways and means.' Concer...
Abstract In the wake sustainability agendas that lead to green growth in the developing countries, the focus has been in the practice and accounting for Social, Environmental and Economic (SEE) activities by both processing and manufacturing organizations. Organizations practice social responsibilities with the view of reaping long term returns or merely complying with regulations, information which is obtained from their annual reports via various media. These reports however, in the purvie...
Abstract Crushed stone is a by-product of crushing stone which has been considered as unsalable and of no significant value. But entrepreneurs seek to use all resources and reduce waste to increase their profit margin and thus utilization of crushed stones will reduce pollution of; natural habitat, air, water and soil. Not much has been done in stone dust utilization and thus this paper examines not only the technological feasibility of using quarry dust as a concrete building material but a...
Abstract Irrigation plays a critical role in addressing food security as envisaged in Kenya’s development blueprint, the Big Four Agenda. However, the performance of any open channel irrigation system is a function of its canal conveyance efficiency, among other factors. To overcome challenges with irrigation water conveyance at the Ahero Irrigation Scheme, a Hydrologic Engineering Centre River Analysis System (HEC-RAS) model was used to simulate the flow characteristics at the tail-end se...
Abstract: The production of copper bears both viable product and by product know as slag which is a challenge to dispose and poses a problem to the environment. BCL holds copper slag is seen as waste which is iron - opulent containing heavy metals which can seep into ground water and affect environment. These metal accumulate in millions of tonnes year after year posing as a threat to the environment and need to be managed to avoid them being harmful. This paper explores metallurgical ways o...
Abstract: This thesis focuses on biological shielding calculations for a 10 MeV Rhodotron electron beam accelerator operating in dual mode to produce a 10 MeV primary electron beam and 7.5 MeV secondary X-rays, generated by hitting an optimized tantalum-73 (73Ta) target with the primary electron beam. The first part of this thesis describes the Rhodotron electron accelerator and its oper ating principle. A model is presented for the transverse optics of a TT-100 Rhodotron accelerator. Potent...
Abstract: ABSTRACT. We conducted larval surveys in habitats located in urban Malindi, Kenya, in 2005 and 2006 with the goal of determining the productivity of unused swimming pools in relation to other habitats. Of the 250 habitats sampled, 66 were unused swimming pools, 93 were wells, 60 were drainage troughs, and 31 were miscellaneous areas, such as septic tanks, swamps, concrete tanks, fish ponds, car-track depressions, and drainage ponds. Anopheles gambiae s.l. was the only anophelines s...
Abstract: Context Tungiasis is a neglected tropical skin disease endemic in resource-poor communities. It is caused by the penetration of the female sand flea, Tunga penetrans, into the skin causing immense pain, itching, difficulty walking, sleeping and concentrating on school or work. Infection is associated with living in a house with unsealed earthen house floors. Methods This feasibility study used a community-based co-creation approach to develop and test simple, locally appropriate, a...
Particulate-filled polymer composites are becoming quite attractive because of their low cost and wide application. Nowadays shells of arthropods and mollusks are widely used as reinforced materials due to their availability and impact mechanical properties. This study focused on theproduction and evaluation of impact strength of snail shell reinforced epoxy composite and as well given concrete information and recommendation on usage with respect to appropriate filler concentration an...
In the sense that the materials involved in this project were capital intensive more especially cement, so in carrying out the work one must have to be careful in the selection and collection of materials to be used in the casting of the concrete.The materials used are coarse aggregate (granite) fine aggregate (sand). The coarse aggregates used in this work were collected from Ishiagu while the fine aggregate was collected in front of the carpentry’s workshop on the campus.The test conform ...