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Experimental and theoretical study on the compressive strength of the high strength concrete incorporating steel fiber and metakaolin
Faculty
Engineering
Year:
2021
Type of Publication:
ZU Hosted
Pages:
57-67
Authors:
Ibrahim Attia Abdelmegeed Abdelgawad
Staff Zu Site
Abstract In Staff Site
Journal:
Structures Elsevier
Volume:
31
Keywords :
Experimental , theoretical study , , compressive strength , , high strength
Abstract:
In this paper, the effect of steel fiber (SF), Metakaolin (MK) and time of curing on the concrete compressive strength (fcu) was implemented. Cylinder specimens cast from concrete with SF (0, 0.25% and 0.5%) and MK (0%, 10%, 15%, 20%, 30%, 40% and 50% as replacement of cement content) were tested in compression at different ages of curing (3, 7 and 28 days). The results assured that; the concrete strength increased as MK% increased from 0% to 15% then decreased with further increase in MK%. Also, increasing the SF% from 0 to 0.5% increased the concrete strength. The optimum values of enhancement in fcu were obtained for concrete mix with 15% MK and 0.5% SF. The enhancement percentages in fcu of this mix at 3, 7 and 28 days were 26.53%, 33.04% and 44.65% over that of the control mix at the corresponding ages respectively. Moreover, a relation between fcu, SF%, MK% and curing age were predicted using two methods (the Central Composite Design, CCD and the Box Behnken Design, BBD). The two methods were also used to construct prediction equations for the cubic strength using experimental results from previous researches. The accuracy of these equations was verified to be a base of mix design for concrete with SF and MK.
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Ibrahim Attia Abdelmegeed Abdelgawad, "Flexural response and load capacity of reinforced concrete beams strengthened with reinforced mortar layer", Elsevier, 2021
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Ibrahim Attia Abdelmegeed Abdelgawad, "Experimental study of the influence of adhesive properties and bond length on the bond behaviour of NSM FRP bars in concrete", Taylor and Francis, 2016
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Ibrahim Attia Abdelmegeed Abdelgawad, "Experimental and analytical investigation into the flexural performance of RC beams with partially and fully bonded NSM FRP bars/strips", Composite Structures, 2015
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Ibrahim Attia Abdelmegeed Abdelgawad, "Strengthening of RC Beams with Improved Side Near-Surface Mounted GFRP Bars Technique", Al-Azhar Univeristy, 2016
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Department Related Publications
Elsayed saad Abdelsalam Salman, "S. Abdel Salam, A. Akl, O. Shallan, “DYNAMIC ANALYSIS OF TUNNEL”, Proceedings of the International Congress on Tunneling and ground Conditions, 3-7 April 1994, national Authority for Tunnels, Cairo, Egypt.", Proceedings of the International Congress on Tunneling and ground Conditions national Authority for Tunnels, Cairo, Egypt., 1994
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Mohamed Salah Amin Abdelaal, "Ultrasonic characterization of expanded polystyrene used for shallow tunnels under seismic excitation", journal homepage: www.sciencedirect.com, 2022
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Hanaa Alsayed Elsayed Abdelmoteleb, "Ultrasonic characterization of expanded polystyrene used for shallow tunnels under seismic excitation", journal homepage: www.sciencedirect.com, 2022
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Alaa Abdelhamied Ali Ata, "Numerical analysis of underground tunnels subjected to surface blast loads", Frattura ed Integrità Strutturale, 2021
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