University of Khartoum

Evaluation of Quality of Concretes for Some Construction Projects in Sudan

Evaluation of Quality of Concretes for Some Construction Projects in Sudan

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dc.contributor.advisor Osama M. A. Daoud en_US
dc.contributor.author Hmdalsed, Marwa Hussin Alamin
dc.date 2016-06
dc.date.accessioned 2018-07-09T12:50:23Z
dc.date.available 2018-07-09T12:50:23Z
dc.date.submitted 2018
dc.identifier.uri http://khartoumspace.uofk.edu/123456789/26596
dc.description 126 page
dc.description.abstract This study aimed to evaluate the quality of concrete, which was produced in Sudan during five years’ period from 2003 to 2007, following-up an earlier research that had addressed five years’ period also (from 2008 to 2012). The evaluation is mainly based on the concrete compressive strength achieved and the deviation of the results from the acceptable strength limits that was recognized. The concrete compressive strength was obtained from test results of a 150mm standard cube mold, crushed at the Building and Road Research Institute (BRRI) laboratories at the ages of 7 and 28 days. Collected results for the five years represent crushing test for grade 25 MPa. The data were collected classified and studied. Analysis and evaluation of the data was performed using the computer program (Excel) and the statistical program (SPSS).The evaluation study was carried out based on the requirements of three international codes of practice; The American Institute Code of practice (ACI318) , the European Code of practice (BS EN 206-1:2000) and the Indian Standard (IS 456,2000), in addition to the quality control charts (Shewhart Charts) .The available data results derived from the data analysis software (Excel & SPSS) were assessed based on the pre-mentioned codes “the concrete quality control levels in Sudan for five years’ period (2003 – 2007) was good”. The highest quality levels recognized during the study period were realized in the year (2003) and since then the quality records displayed in a little decreasing during the following years, as clearly illustrated in the study. Application of the above mentioned methods of quality evaluation to the collected strength test results has led to the American standard method overestimates the quality level, the European methods of quality evaluation gives average levels, while the Indian standard underestimates the quality level. This result was expected from the formula of acceptance conditions of the three methods. The lowest quality levels were achieved during the year 2007 according to all evaluation methods. As general the quality level was slightly decreasing from one year to another. These findings are consistent with the results obtained from previous research for five years (2008-2012) as the index reflects a decrease in the level of quality during the ten years starting from the year 2003 up to 2007, to continue to decline down till 2012. en_US
dc.language.iso en en_US
dc.publisher University of Khartoum en_US
dc.subject Concretes en_US
dc.subject Some Construction Projects en_US
dc.subject Sudan en_US
dc.title Evaluation of Quality of Concretes for Some Construction Projects in Sudan en_US
dc.type Thesis en_US
dc.Degree M.Sc en_US
dc.Faculty Building and Road Research Institute en_US

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