The Importance of Standardization of Aggregate in Ethiopian Construction Industry
| dc.contributor.advisor | Dinku, Abebe(Professor) | |
| dc.contributor.author | Negash, Biruk | |
| dc.date.accessioned | 2018-07-02T11:39:10Z | |
| dc.date.accessioned | 2023-11-11T08:29:55Z | |
| dc.date.available | 2018-07-02T11:39:10Z | |
| dc.date.available | 2023-11-11T08:29:55Z | |
| dc.date.issued | 2014-02 | |
| dc.description.abstract | Concrete is one of the versatile and widely used building materials in the world Construction industry. Fine and coarse aggregates make about 70% by volume of concrete production. It goes without saying that the quality of concrete is thus strongly influenced by aggregate’s physical and mechanical properties as well as chemical composition of the parent aggregate making material. Since most of these materials are from natural sources in Ethiopian case like from rivers and from natural quarry site, their quality and composition vary from time to time. Each truck of sand from the same place at different time may not be the same and it is difficult to design mix proportion for each truck of sand and this call for a standardization of materials in Ethiopia. In my research I made concrete C-25, C-30 and C-40 as control mix by standardizing the aggregate to the Ethiopian standard and other recommendation. By using the property of this standardized aggregate mix design was made for control mixes, keeping the mix proportion constant, aggregates from different sources were used to make concrete of the same classes as control mix. Compressive strength test were made at 3rd, 7th and 28th days for control mixes and for mixes with nonstandard aggregates. Target mean strengths were achieved for control mix by using Derba Cement 260kg/m3, 280kg/m3 and 380kg/m3 for C-25, C-30 and C-40 respectively. On the other hand concrete with non standard aggregate didn’t achieve target mean strength rather up to 48% reduction in strength was observed. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/5432 | |
| dc.language.iso | en | en_US |
| dc.subject | Construction industry | en_US |
| dc.title | The Importance of Standardization of Aggregate in Ethiopian Construction Industry | en_US |
| dc.type | Thesis | en_US |