- Background of the Study
Construction materials are either naturally occurring or manufactured in factories. Some materials are a combination of composite materials. An example of composite material is concrete. Concrete is a composite material consisting of sand, coarse aggregates, cement and water mixed together to form a solid material when hardened. (Aginam et al., 2013). It is a versatile construction material, which can be used in virtually all structural works. Concrete is a mixture of cement paste and aggregate; Cement provides the binding medium while aggregate gives volume to the concrete (Aginam et al, 2013).
Aggregates which are prominent material in concrete constitute 60 – 80% of total concrete constituent Neville and Brook (2007). The most effective properties of aggregate utilization in concrete are reducing the volume change in concrete, improving the concrete properties against environmental effects and against static and dynamic loads on concrete by its own capacity. Kuo and Freeman (2000). The composition, shape, characteristics, size of aggregate and source of aggregate have significant impact on the workability, durability, strength, weight, fire resistance and shrinkage limit of the properties of concrete. Thus, the sources of aggregate can have influence on the characteristics and properties of concrete produced thereof.
1.2 Statement of the Problem
Granite is obtained from various sites; each site has peculiar characteristics depending on soil composition and method of crushing. Previous studies show that shape, size of aggregate has significant impact on the properties of a concrete. Therefore, there are needs to know the standard specification of each granite source and method of crushing have significant effect on the properties of concrete, so as to know which site will produce concrete of good properties.
1.3 Aim and Objectives
The aim of this study is to investigate the effect of granite sourced from different locations in ogbomosoland on the properties of concrete.
The objectives of the study are to:
- determine the physical characteristics (Sieve analysis, specific gravity, moisture content, aggregate impact value, aggregate crushing value) of the granite obtained from four quarry locationed in ogbomosoland;
- assess the workability of concrete produced using granite obtained from the four quarry locations, and
- evaluate the density, compressive strength, splitting tensile strength and water absorption of concrete produced, using granite from the four quarry locations.
- Significance of the Study
To study is to ensure aggregate that are produced from quarry sites meet the standard specifications for concrete aggregate as specified in ( ASTM C33, 2003) and also ensure clients, contractors and suppliers know the quarry site that produces best qualities and standard granite for production of concrete.
The research will also contribute to knowledge on determination of aggregate crushing value, aggregate impact value, mechanical properties, workability and physical characteristics of the granite sourced from the four different locations.
1.5 Scope and Limitations of Study
The study involves the determinations of the physical properties, (specific gravity, moisture content, aggregate impact value and aggregate crushing value) of granite from four locations in ogbomosoland. Also study will be on fresh concrete (slump and compactor test) and hardened concrete, (compressive, slitting tensile strength and water absorption) produced using granite obtained from four locations. Thermal properties, vebe and ball penetrations tests are outside the scope of study.