Preparation of Ethiopian Standard Sand for The Purpose of Construction and Testing
| dc.contributor.advisor | Tadesse, Samuel(PhD) | |
| dc.contributor.author | Berhanu, Belayneh | |
| dc.date.accessioned | 2018-06-13T12:02:31Z | |
| dc.date.accessioned | 2023-11-11T08:29:27Z | |
| dc.date.available | 2018-06-13T12:02:31Z | |
| dc.date.available | 2023-11-11T08:29:27Z | |
| dc.date.issued | 2005-09 | |
| dc.description.abstract | Sand is a naturally produced material resulting from the mechanical and chemical breakdown of rocks. Sand is the most common and loosely packed mineral on the earth's surface. Sand particles mostly range from 0.02 mm to 2.00 mm in diameter. Silica sand is the term used to describe sand that has a very high percentage of silicon dioxide (SiO2). In the field of civil engineering, silica sand is used for several purposes like, in construction, in industries for the production of different construction materials. Sand, which is graded according to a specified standard, is used for testing of Portland cement and concrete, in field density determination using sand replacement method, and in water and sewage treatment plants as a filter media. Due to lack of standard silica sand in Ethiopia, the country is losing high foreign currency by importing standard silica sand from abroad. The purpose of this research is the identification of the different sources of sand in different parts of the country for the purpose of standard sand production. To achieve the research objective, sand samples for laboratory investigation and field test were collected from North Showa (Jema river valley) and Dire Dawa town. Visual inspection, index property tests, test for impurities and chemical contents were conducted on both samples. Sand replacement and mortar test were done to check the applicability of the local samples 9 in field density determination and in testing of Portland cement respectively. Grain size analysis and impurity test results revealed that both local sand samples cannot be used as standard sand as they are collected directly from their natural places. Thus, inorder to be used as standard sands both samples must be washed, oven dried, sieved and separated to various size fractions and mix each fraction according to the grading requirement. In all of the test results, the compressive and flexural strength of mortar cubes made with local samples gave lower values compared to that of imported sand. However, a relatively uniform trend was observed both in the compressive and flexural test results between the local samples and the imported one. The field density test by sand replacement method showed that, both local sand samples gave the same result with the imported Ottawa standard sand in almost all test locations irrespective of the silica content. Laboratory and field tests conducted on both local sand samples showed that there is a high possibility that both local sand samples can replace the imported standard sand. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/757 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Construction | en_US |
| dc.title | Preparation of Ethiopian Standard Sand for The Purpose of Construction and Testing | en_US |
| dc.type | Thesis | en_US |