ABSTRACT Instability of a damaged pile due to a statically or dynamically applied overload is studied in this work using the finite element method. A damage parameter from such a pile is calculated using fracture mechanics concepts. The parameter is used to modify the beam element at the cracked or damaged location. Soil samples were obtained from the site of the pile and were subjected to laboratory tri-axial tests to obtain shear strength parameters c and . Other soil parameters s...
ABSTRACT This work presents comparative study of strength of truss reinforced concrete beam and conventional reinforced concrete beam. Two sets of 0.15 x 0.15 x 1m beams were cast. One set was cast using truss as a system of reinforcement at spacing of 100mm, 150mm and 200mm. The other set was cast using longitudinal bars and links at spacing of 100mm, 150mm, and 200mm as the conventional reinforcement. In all 27 truss and 27 conventional reinforcement beams were cast. Three mix ratios we...
ABSTRACT This research work focused on the Prediction of Compressive strength of Saw dust Ash-Cement concrete using Artificial Neural Network method. Neural Networks offer a number of advantages including requiring less formal statistical training, ability to implicitly detect complex non-linear relationship between dependent and independent variables, ability to detect all possible interactions between predictor’s variables, and availability of multiple training algorithms. A 5-20-1 ne...
ABSTRACT The quality of water from Otamiri River, Nworie River and Bore hole water as sources of municipal water supply system in Owerri has been evaluated by analyzing samples of raw water collected from Otamiri River and Nworie River and comparing them with selected borehole and treated water samples. Some selected borehole water analyses were carried out for their physiochemical parameters, major ions, nutrients and bacteriological quality. The obtained values from the analysis are:- A...
ABSTRACT The study assessed the flow characteristics of Amanyi stream for a mini hydro power development for Neke Uno, Isi-Uzo Local Government Area of Enugu State, Nigeria. The stream has a maximum flow discharge, Qmax of 8.5m3/s, average discharge, Qav of 6.9m3/s, minimum dependable discharge, Qmin of 4.21m3/s and a selected design discharge Qd of 6.37m3/s. Topographic survey and plant layout showed a head of 3.63m (low head) which is possible for power generation. It was also determine...
ABSTRACT The traditional method, De Saint-Venant theory which was used in the previous analysis of thin-walled structures assumed free warping of all thin-walled structures, which is very rare in engineering. In this research work, Vlasov’s torsion theory which incorporates restraint warping was employed in the analysis of box culvert. The incorporation of restraint warping by Vlasov made the equation for computing angle of twist extremely rigorous as compared to Saint Venant’s equati...
ABSTRACT The study was aimed at developing mathematical models on the hydraulic performance of Sandbags as Checkdam for erosion control. Pilot studies were carried out at two sites. Site ‘A’ was a natural gully at a location in Ezinihitte-Mbaise, Imo State while site ‘B’ was an artificial channel excavated on the slope of Otamiri River at Federal University of Technology, Owerri. Artificial runoff was simulated into site ‘B’ by pumping water from Otamiri River. Sandbags of var...
ABSTRACT This research work is aimed at the development of computer programs using MATLAB based on the new polynomial shape functions, for analysis of single panel and continuous thin isotropic rectangular plates. Twelve single panel plate types of different boundary conditions namely SSSS, CCCC, CSSS, CSCS, CCSS, CCCS, SSFS, SCFS, CSFS, CCFS, SCFC and CCFC for aspect ratio, s= b/a, were analyzed for pure bending, buckling and free vibration using computer programs developed in this work....
ABSTRACT This research aimed at empirical investigation of flexural strength of compressed stabilized earth slab. Two sets of 500 x 500 x 150mm compressed stabilized earth slabs were cast. One set was cast with BRC mesh of 5 x 150 x 150mm with strength of 250N/mm2 as reinforcement and the other set was cast without reinforcement. Eight mixture proportions of laterite, river sand and cement were used in this research work and optimum moisture content obtained from compaction test of the mi...
Correlation and regression in this paper were employed as analytical tools to study the degree of relationship as well as the nature and strength of the relationship between green concrete properties and percentage replacement of cement with civil engineering materials. Pearson product-moment method and Spearman’s correlation coefficient were extensively used to show how correlation analysis can be practically applied in green concrete research. Least square regression line method for b...
ABSTRACT Sugarcane as an agricultural product is a readily available source of food for its sugar content. However, Sugarcane Bagasse Ash (SCBA) is the bi- product formed at sugar industries from the burning of sugarcane after the sugar content has been extracted. Sugarcane Bagasse Ash (SCBA) is a fibrous waste product containing mainly aluminum and silica, calcium ions to produce calcium aluminate hydrate (CAH) and calcium silicate hydrate (CSH) shown in the pozzolanic reaction below. Ca2+ +...
This research investigates the improvement of the mechanical and durability properties of concrete using Date Palm Seed Ash (DPSA) as partial replacement of cement. The DPSA used was obtained by controlled burning of date palm seed in a kiln at a maximum temperature of 630oc for eight hours and after cooling, it was sieved through 75um sieve and its oxide composition analysis was conducted using X-ray fluorescence (XRF) procedures. DoE method of mix design was used to produce concrete ingredi...
There is an inherent correlation between law and pace of infrastructural development. A solid, clear and foreseeable legal construction policy regime forms the basis for infrastructural development. In any form of legal regime, the role of the government and its bureaucracy remains crucial at every stage including licensing, construction and operation of infrastructural development projects. The Corona Virus (Covid-19) pandemic has introduced new construction requirements. This research work ...
In this paper, rocks with existing cracks and the effects on concrete structures it supports is discussed. Based on this paper, rock cracks may occur naturally when the rock gets closer to the earth surface due to erosion, through weathering processes (particularly frost wedging in mountainous areas and the diurnal heating and cooling of a rock outer layer in hot arid environments) and through tree roots. Artificially, cracks in rock may be caused by shock waves during rock blasting. The effe...
The development of the country is directly related with the better road communication from mega cities to rural villages. Pakistan is a developing country and has started a grand network of highways, superhighways and motorways in all four provinces along with Kashmir and Northern and northwestern regions bordering china and Afghanistan. Highway Flexible pavements are the most commonly used form of pavements and have four component layers namely Sub-grade, Sub-base and base and surface course...