Abstract
Concrete is an intimate mixture of Coarse Aggregate, Sand (Fine Aggregate), Cement and Water. In building construction, most of the activities are executed using concrete so that Concrete materials quality is important. Construction materials used in construction determine the behavior of the structure and resulted in any types of failures or defects. The objective of this study was the assessment on the quality of concrete materials used in building construction projects, specifically to identify types of concrete materials used in Assosa University, to determine properties of concrete materials and to compare with standard. The methodologies includes, data collection methods (field observation and laboratory test), and organized data, data-analyzed and conclusion made from the result of data analysis and forwarded recommendations. Based on the findings, the determined properties of materials includes silt content of sands, 4.64%, 3.85%, 9.26%, 11.67%; Gs (ssd), 2.430%, 2.595%, 2.465%, 2.492%; compacted unit weight, 1407.94 Kg/m3, 1498.00 Kg/m3, 1348.92 Kg/m3, 1303.08 Kg/m3; and Bambasi, Sherkole Kumeruk and Fududu respectively.
Highlights
The construction industry is complex in its nature, because it comprises large numbers of parties as owners, contractors, consultants, stakeholders and regulators
Primary data had been taken first-hand data collection through field observations to identify the concrete materials used in Assosa University, laboratory test for materials and representative samples had been taken to laboratory and tests for silt content of sands, gradation of aggregates, specific gravity and water absorption of aggregates, unit weigh of aggregates, flakiness index aggregates, aggregate
Sherkole sand obtained from Sherkole river, fududu sand obtained from fududu river, Bambasi sands obtained from Bambasi river and Kumuruk sands obtained from Kumuruk river
Summary
The construction industry is complex in its nature, because it comprises large numbers of parties as owners (clients), contractors, consultants, stakeholders and regulators. Economic growth depends on the physical infrastructure that is delivered by the construction industry and its key participants. It provides a society with delivery mechanisms for many aspects of its needs such as economic, social, political, environmental, public sector reform [10]. Assosa University building projects exposed to concrete material’s quality problem during site observation. The materials used in existing buildings and the on-going projects are the same quality of materials. This research study attempted to verify the properties of materials if within standard specification or not Examples include the presence of a high-strength rod and (or) spiral reinforcement in a concrete core.
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