ABSTRACT This study investigated the corrosion resistance of steel reinforcement in two types of concrete mixtures – ordinary Portland (OPC) used for concrete and clay pozzolana cement (CPC) used for concrete. These two concrete types were exposed to 3% and 5% (W/V) of Sodium Chloride (NaCl) and 3% (W/V) Calcium Hypochlorite (Ca(OCl)2) that acted as corrosion media. Mechanical properties and electrochemical analysis were performed over 1, 7, 15 and 23 days. The results indicated that concr...
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 The main aim of the research is to study the mechanical properties of concrete and heir effects in concrete stability and failure. He fractures mechanical properties in particular uniaxial tensile strength Ft, young’s modules Eo and fractures energy Gf as sell as the shape of the stress strain and the stress- deformation relation were investigated for high strength and normal strength concrete. In order to analyzed failure mechanism of the entire fracture cement pasture and cemen...
ABSTRACT A considerable fraction of sand in Niger Delta Area of Nigeria is contaminated with crude oil. The contaminated sand is largely utilised by local contractors for the production of concrete. However, there is need to establish its suitability in concreting. Previous works have centered on hardened uncontaminated concrete in crude oil environment but not on concrete made with Crude Oil Contaminated Sand (COCS). This research was designed to evaluate the effect of COCS on some engineer...
ABSTRACT This research work reports the investigation carried out to determine the strength and microstructure of lateritic concrete containing palm kernel shell (PKS) as partial . replacement of coarse aggregates. The study employed different mix proportions, which resulted in casting and testing 148 cubes at 7, 14, 21, 28, 60, and 90-days of curing, to determine the best and economic proportion that will give compressive strength. The materials and methodology phase of this research evalua...
ABSTRACT This project presents the results of the investigation conducted on a lightweight foamed concrete using different reagents; Sodium Lauryl Sulphate (SLS) and Lithofoam, with a view to determining its potential as a construction material in Nigeria. The properties investigated on the foamed concrete having target density of 1800kg/m3 were: workability, bulk density and compressive strength. The foamed concretes produced using SLS were developed using a w/c ratio of 0.5 and a mix ratio ...
Abstract In countries where industrialization is on the rise there is a corresponding increase in waste production resulting from industries which eventually upsetsthe environment and community for which they provide. While most of these waste generated are hazardous and should be managed, others could be put to appropriate use either directly or after been recycled. Most agro-waste can be recycled and be used asraw materialsfor manufacturing various products. This research is designed to inv...
TABLE OF CONTENTSDECLARATION................................................................................................ ivAPPROVAL..................................................................................................... iiACKNOWLEDGEMENT ....................................................................................iiiABSTRACT ................................................................................................... ivTABLE OF CONTENTS .............................
ABSTRACT The project titled “The effect of admixtures on properties of concrete: case study of sugar, cow bone ash, groundnut shell ash, and lime stone powder” was carried out with the aim of knowing the effect the of the various types of admixtures used on the properties of concrete, in term of the workability of concrete, durability of concrete and the concrete strength. The material used are cow bone ash, groundnut shell ash, sugar and lime stone powder. The cow bon...
ABSTRACT In recent years there has been an increase in the number of construction works and concrete is the main construction material for most of the structures that are being built. Nigeria is a developing Country with a large population and land area therefore a consumer of concrete. This paper considers the option of recycling concrete in order to meet the high concrete demand and effective management of construction and demolition waste. The test focused on the use of recycle...
ABSTRACT This study is concerned with the production of high strength concrete using recycled concrete aggregates as alternative to natural aggregates. The study includes also the determination of the proportions, characteristics and components of concrete mixes required for production and use in multiple applications at suitable prices. The basic materials used in this research (ordinary Portland cement, natural aggregates, recycled concrete aggregates, natural valley sand, local tap water ...
ABSTRACT Bamboo is one of the oldest traditional materials used by mankind. They are the largest members of the grass family and are the fastest growing in the world. Bamboo is a substitute building material which is renewable, environment friendly and widely available as the wood resources are diminishing and restrictions are imposed on the felling of the natural forest trees. Due to its rapid growth and high yield, adaptability to most climatic conditions and due to its properties, bamboo...
ABSTRACT The versatility in-use of concrete for buildings and other infrastructures of necessity made concrete an important element of construction. Yet failure of concrete occurs more frequently at construction stage even when it seemed that mix ratio and design load calculations are adequate. This therefore suggests a missing gap in specification and the production of good site concrete. Literature survey confirms poor quality of concrete and use of sub-standard materials of concrete in th...
To study the effects of different types of bacteria on concrete. Develop a bacteria1 concrete by introducing the different bacteria. To study the efficiency of bacteria when mixed with mineral admixtures. Good compressive strength by arriving at optimum proportions by tria1. To make a comparative study of bacteria1 concrete with norma1 concrete.
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...