Five reinforced concrete beams with rectangular cross section 120 x 300 mm and flexural reinforcement ratio of 0.0124 were cast and tested under three-point static loading. One beam was tested up to failure as control beam. The rest of the beams were loaded up to the inclined cracking load. Then the load was removed and the beams were repaired using steel fiber-reinforced self-consolidating concrete (SFRSCC) jacket with varied thicknesses and fiber contents. Then the repaired were retested up to failure. The fiber contents of 0.5, 0.75 and 0.75% by the volume of concrete as well as jacket thicknesses of 30 and 50 mm were considered for this study. The experimental results showed that the proposed technique enhanced the load capacity of the repaired beams by up to 121% with respect to the original specimen, and reduced the induced deflections and strains at the different stages of loading. Moreover, increasing fiber content with a fixed jacket thickness was found to be more effective than increasing the jacket thickness with the same fiber content.

MWCNTs samples were characterized by High-resolution transmission electron microscopy (HRTEM) and Brunauer–Emmett–Teller (BET) to measure the particle size and surface area of the samples, respectively. In this study, three different nanocomposites were prepared with MWCNTs to cement ratios of 0.3%, 0.7% and 1% by weight. The enhancement of the dielectric and piezoelectric properties of cement composites was achieved.

MWCNTs samples were characterized by High-resolution transmission electron microscopy (HRTEM) and Brunauer–Emmett–Teller (BET) to measure the particle size and surface area of the samples, respectively. In this study, three different nanocomposites were prepared with MWCNTs to cement ratios of 0.3%, 0.7% and 1% by weight. The enhancement of the dielectric and piezoelectric properties of cement composites was achieved.

The use of high-strength concrete (HSC) has been widely accepted by designers and contractors in reinforced concrete structures, especially heavily loaded column of high-rise building and bridges. To study the strength and deformability of HSC columns subjected to eccentric loading, nine columns were tested under eccentric loading and one column only was tested under axial loading. The investigated parameters were concrete compressive strength, slenderness and rectangularity ratios, and load eccentricity. The concrete compressive strength ranged from 36.0 to 75.0 MPa and the slenderness ratio was ranged from 6.67 to 10.0 while the considered eccentricities ratios ranged from 0.0 to 0.80. Also, comparison between experimental and analytical study was carried. The results indicated that increasing concrete compressive strength resulted in increasing the column strength capacity. While increasing the eccentricity are resulted in decreasing the column strength capacity. Also the comparison between experimental and analytical study indicated that both ACI 318R-14 and ECP 203-07 codes are acceptable and valid to determine both the load and the moment capacity of such columns subjected to eccentric loading if take into consideration the additional moment induced due to column deformations.

The use of high-strength concrete (HSC) has been widely accepted by designers and contractors in reinforced concrete structures, especially heavily loaded column of high-rise building and bridges. To study the strength and deformability of HSC columns subjected to eccentric loading, nine columns were tested under eccentric loading and one column only was tested under axial loading. The investigated parameters were concrete compressive strength, slenderness and rectangularity ratios, and load eccentricity. The concrete compressive strength ranged from 36.0 to 75.0 MPa and the slenderness ratio was ranged from 6.67 to 10.0 while the considered eccentricities ratios ranged from 0.0 to 0.80. Also, comparison between experimental and analytical study was carried. The results indicated that increasing concrete compressive strength resulted in increasing the column strength capacity. While increasing the eccentricity are resulted in decreasing the column strength capacity. Also the comparison between experimental and analytical study indicated that both ACI 318R-14 and ECP 203-07 codes are acceptable and valid to determine both the load and the moment capacity of such columns subjected to eccentric loading if take into consideration the additional moment induced due to column deformations.

The use of high-strength concrete (HSC) has been widely accepted by designers and contractors in reinforced concrete structures, especially heavily loaded column of high-rise building and bridges. To study the strength and deformability of HSC columns subjected to eccentric loading, nine columns were tested under eccentric loading and one column only was tested under axial loading. The investigated parameters were concrete compressive strength, slenderness and rectangularity ratios, and load eccentricity. The concrete compressive strength ranged from 36.0 to 75.0 MPa and the slenderness ratio was ranged from 6.67 to 10.0 while the considered eccentricities ratios ranged from 0.0 to 0.80. Also, comparison between experimental and analytical study was carried. The results indicated that increasing concrete compressive strength resulted in increasing the column strength capacity. While increasing the eccentricity are resulted in decreasing the column strength capacity. Also the comparison between experimental and analytical study indicated that both ACI 318R-14 and ECP 203-07 codes are acceptable and valid to determine both the load and the moment capacity of such columns subjected to eccentric loading if take into consideration the additional moment induced due to column deformations.

Groundwater in Assiut governorate has a particular importance where it is the second source for fresh water used for drinking, agricultural, domestic, and industrial purposes. Three hundred and thirty five wells were available during the period 2006 to 2009, and were subjected to analysis for chemicalcharacteristics. These data has been used to conclude two main results; the first one is preliminary evaluation of suitability of groundwater for drinking and irrigation purposes by comparing those parameters with world health organization (WHO) standards and Egyptian standards. the second one is building the correlation matrix between the groundwater quality parameters which are major ions, EC, TDS, SAR, Na%, RSC, TH, KI, PI, MH, CAI, and C.R. with comparing chemical parameters with WHO (1996) and Egyptian standards for drinking, it shows that concentrations of Na+, K+, Ca2+, Mg2+, Hco3-, SO42−, and Fe are lower than the permissible limits in 80% of well s. Groundwater wells were classified according TDS as about 93 % of wells have TDS less than 3000 mg/l, thus groundwater is suitable for irrigation.

Groundwater in Assiut governorate has a particular importance where it is the second source for fresh water used for drinking, agricultural, domestic, and industrial purposes. Three hundred and thirty five wells were available during the period 2006 to 2009, and were subjected to analysis for chemicalcharacteristics. These data has been used to conclude two main results; the first one is preliminary evaluation of suitability of groundwater for drinking and irrigation purposes by comparing those parameters with world health organization (WHO) standards and Egyptian standards. the second one is building the correlation matrix between the groundwater quality parameters which are major ions, EC, TDS, SAR, Na%, RSC, TH, KI, PI, MH, CAI, and C.R. with comparing chemical parameters with WHO (1996) and Egyptian standards for drinking, it shows that concentrations of Na+, K+, Ca2+, Mg2+, Hco3-, SO42−, and Fe are lower than the permissible limits in 80% of well s. Groundwater wells were classified according TDS as about 93 % of wells have TDS less than 3000 mg/l, thus groundwater is suitable for irrigation.

Groundwater in Assiut governorate has a particular importance where it is the second source for fresh water used for drinking, agricultural, domestic, and industrial purposes. Three hundred and thirty five wells were available during the period 2006 to 2009, and were subjected to analysis for chemicalcharacteristics. These data has been used to conclude two main results; the first one is preliminary evaluation of suitability of groundwater for drinking and irrigation purposes by comparing those parameters with world health organization (WHO) standards and Egyptian standards. the second one is building the correlation matrix between the groundwater quality parameters which are major ions, EC, TDS, SAR, Na%, RSC, TH, KI, PI, MH, CAI, and C.R. with comparing chemical parameters with WHO (1996) and Egyptian standards for drinking, it shows that concentrations of Na+, K+, Ca2+, Mg2+, Hco3-, SO42−, and Fe are lower than the permissible limits in 80% of well s. Groundwater wells were classified according TDS as about 93 % of wells have TDS less than 3000 mg/l, thus groundwater is suitable for irrigation.

Groundwater in Assiut governorate has a particular importance where it is the second source for fresh water used for drinking, agricultural, domestic, and industrial purposes. Three hundred and thirty five wells were available during the period 2006 to 2009, and were subjected to analysis for chemicalcharacteristics. These data has been used to conclude two main results; the first one is preliminary evaluation of suitability of groundwater for drinking and irrigation purposes by comparing those parameters with world health organization (WHO) standards and Egyptian standards. the second one is building the correlation matrix between the groundwater quality parameters which are major ions, EC, TDS, SAR, Na%, RSC, TH, KI, PI, MH, CAI, and C.R. with comparing chemical parameters with WHO (1996) and Egyptian standards for drinking, it shows that concentrations of Na+, K+, Ca2+, Mg2+, Hco3-, SO42−, and Fe are lower than the permissible limits in 80% of well s. Groundwater wells were classified according TDS as about 93 % of wells have TDS less than 3000 mg/l, thus groundwater is suitable for irrigation.