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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/1440

Authors: Denamo, Addissie
Advisors: Abebe Dinku, Dr. –Ing.
Christoph Motzko, Prof. Dr. –Ing.
Keywords: concrete
fine aggregate
coarse aggregate
Copyright: 2005
Date Added: 16-Oct-2008
Publisher: Addis Ababa University
Abstract: ABSTRACT Construction materials management is an important element in the management of construction projects. One of the construction materials widely used in construction projects is concrete. Concrete being one of the important constituents of many of the construction projects, in addition to its subjectivity to variability, requires a close and thorough care and handling in construction projects. The constituents of concrete, which majority of them occur naturally, are subjected to a wide range of variability and quality problems. Therefore, with this respect a research was carried out to assess the situation of handling of concrete making materials in the Ethiopian construction industry with a special emphasis given to the concrete making aggregates. The objective of the research was to assess the current situation of the handling of concrete making materials in the Ethiopian construction industry in general and to give recommendation inline with the outcome of the results of the research. There fore, in the research test results of fine aggregate, coarse aggregate and rock samples were collected and analyzed. According to the result, 44%of the coarse aggregate samples considered and 77% of the fine aggregate samples considered couldn’t satisfy requirements set by different standards. In addition, it has been found out that more than about 60% of the tests that the samples failed to satisfy don’t attribute to the natural quality of the materials. Further, researches carried out in different parts of Ethiopia had also shown that the naturally available material have quite acceptable quality to be used as a concrete making material. The research also indicates that the reason why concrete making materials fail to comply with requirements attributes to the handling of the materials in the construction industry but not to the unavailability of materials satisfying requirements in Ethiopia. Further, from the observations made in construction sites and aggregate production plants in addition to the interviews made with relevant personnel, it was concluded in the research that the aggregate production in Ethiopia is not up to the standard with respect to quality, quantity and production process. Another conclusion drawn from the research was that the aggregate production process and handling of concrete making materials in the Ethiopian construction industry should be upgraded in all aspects including expert training, utilization of improved production process and introduction of standardization both for the quality of the materials and the production processes. Finally, from observations made in Germany the study concluded that introduction of a ready-mixed concrete production system to the Ethiopian construction industry could improve the current situation with respect to better handling and production of good quality concrete.
Description: A thesis submitted to the School of Graduate Studies of Addis Ababa University in Partial fulfillment of the requirements for the Degree of Master of Science in Civil Engineering (Construction Technology and Management)
URI: http://hdl.handle.net/123456789/1440
Appears in:Thesis - Civil Engineering

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