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Megahed, A., Adam, I., Farghal, O., Sayed, M. (2016). INFLUENCE OF MIXTURE COMPOSITION ON WASHOUT RESISTANCE, FRESH PROPERTIES AND RELATIVE STRENGTH OF SELF COMPACTING UNDERWATER CONCRETE. JES. Journal of Engineering Sciences, 44(No 3), 244-258. doi: 10.21608/jesaun.2016.117599
Abd Elrahman Megahed; Ihab Adam; Omar Farghal; Mohamed Omar Sayed. "INFLUENCE OF MIXTURE COMPOSITION ON WASHOUT RESISTANCE, FRESH PROPERTIES AND RELATIVE STRENGTH OF SELF COMPACTING UNDERWATER CONCRETE". JES. Journal of Engineering Sciences, 44, No 3, 2016, 244-258. doi: 10.21608/jesaun.2016.117599
Megahed, A., Adam, I., Farghal, O., Sayed, M. (2016). 'INFLUENCE OF MIXTURE COMPOSITION ON WASHOUT RESISTANCE, FRESH PROPERTIES AND RELATIVE STRENGTH OF SELF COMPACTING UNDERWATER CONCRETE', JES. Journal of Engineering Sciences, 44(No 3), pp. 244-258. doi: 10.21608/jesaun.2016.117599
Megahed, A., Adam, I., Farghal, O., Sayed, M. INFLUENCE OF MIXTURE COMPOSITION ON WASHOUT RESISTANCE, FRESH PROPERTIES AND RELATIVE STRENGTH OF SELF COMPACTING UNDERWATER CONCRETE. JES. Journal of Engineering Sciences, 2016; 44(No 3): 244-258. doi: 10.21608/jesaun.2016.117599

INFLUENCE OF MIXTURE COMPOSITION ON WASHOUT RESISTANCE, FRESH PROPERTIES AND RELATIVE STRENGTH OF SELF COMPACTING UNDERWATER CONCRETE

Article 1, Volume 44, No 3, May and June 2016, Page 244-258  XML PDF (809.7 K)
Document Type: Research Paper
DOI: 10.21608/jesaun.2016.117599
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Authors
Abd Elrahman Megahed1; Ihab Adam2; Omar Farghal1; Mohamed Omar Sayed email 2
1Civil Eng. Dept., Assuit University
2Construction Research Institute, National Water Research Center, Egypt
Abstract
Successful design of underwater concrete mixtures must fulfill two basic requirements: adequate flowability to spread into the placing forms without consolidation, and viscosity in order to resist the washing out. In this paper an investigation was carried out to determine the effect of the dosage of anti washout admixture (AWA), water cementitious materials ratio (w/cm),sand to total aggregate ratio(s/a), and the supplementary cementitious materials on the washout resistance, fresh properties and the relative compressive strength of self-compacting underwater concrete (SCUWC). Therefore five groups were prepared for this study. First group studied the effect of the supplementary cementitious materials, second group dealt with the effect of the AWA ratios, third group is concerning with the effect of w/cm ratio, fourth group take into account the effect of s/a ratio and finally fifth group included the effect of cementitious materials. Test results indicate that the concentrations of antiwashout admixture (AWA) have direct effect on washout resistance and relative compressive strength. The washout mass loss can be reduced by using 10% silica fume replacement. Also it can be reduced by decreasing the w/cm and increasing the cement content and that result in greater relative strength.
Keywords
Underwater concrete; Self compacting concrete; Antiwashout admixture (AWA); Washout resistance; Silica fume
Main Subjects
Civil Engineering: structural, Geotechnical, reinforced concrete and steel structures, Surveying, Road and traffic engineering, water resources, Irrigation structures, Environmental and sanitary engineering, Hydraulic, Railway, construction Management.
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