Mohamed K. IsmailCairo University | CU · Department of Structural Engineering
Mohamed K. Ismail
PhD, MSc
About
64
Publications
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Introduction
Mohamed K. Ismail currently works at the Department of Structural Engineering, Cairo University, Egypt. Mohamed does research in Structural Engineering. Their current projects are 'structural applications of sustainable construction materials; strengthening and rehabilitation of concrete structures; modelling complex structural behaviors using artificial intelligence and data-driven models.'
Additional affiliations
January 2021 - December 2023
August 2017 - December 2020
January 2014 - August 2017
Education
September 2013 - August 2017
October 2011 - May 2013
September 2005 - May 2010
Publications
Publications (64)
This study presents an enhanced predictive model for the seismic shear strength of exterior beam-column joints (BCJs). Initially, the principles of strut-and-tie mechanism and variable selection procedures were first utilized to identify the most influential parameters. Subsequently, an evolutionary algorithm, specifically multigene genetic program...
This study aimed to investigate the feasibility of using geopolymer paste (GP) as an adhesive agent for (i) anchoring steel bars in concrete substrates, (ii) repairing concrete, and (iii) repairing limestone and granite masonry blocks commonly found in historic buildings. In this investigation, seven cement-free GP mixes were developed with differe...
During seismic events, reinforced concrete (RC) columns play a crucial role in maintaining buildings’ structural integrity. This motivated engineers and practitioners to search for key parameters that influence the load-carrying capacity and failure mechanisms of such columns. However, the complexity and nonlinearity of seismic effects along with t...
Unbonded post-tensioned concrete masonry (UPCM) shear walls present an effective seismic force resisting system due to their ability to mitigate expected damage risks through their self-centering capabilities. A few design procedures were proposed to predict the in-plane flexural response of UPCM walls, albeit following only basic mechanics and/or...
A number of regression-based models have been proposed to quantify the seismic shear strength of reinforced concrete (RC) columns. However, most of these models suffer from a high degree of uncertainty as a result of the limited datasets used in their development and/or the classic approaches used to capture the non-linear interrelationships betwee...
In this study, acoustic emission (AE) monitoring was used to investigate the cracking behavior of normal concrete beams repaired with fiber-reinforced cementitious composites (FRCC). The investigated beams were strengthened at two locations: tension side and compression side of the beam. Two different fibers were used in FRCC strengthening material...
Reinforced concrete block shear walls (RCBSWs) have been used as an effective seismic force resisting system in low- and medium-rise buildings for many decades. However, attributed to their complex nonlinear behavior and the composite nature of their constituent materials, accurate prediction of their seismic performance, relying solely on mechanic...
This study contributes to investigating the potential of using lightweight slag aggregates (SL) in structural applications, as well as exploring the near-optimal options of using fine and/or coarse SL to construct high-performance lightweight structural elements. Large-scale self-consolidating reinforced concrete beams were cast with different comb...
The complexity of the shear buckling in tapered plate girders has motivated researchers to conduct experimental and numerical investigations to understand the underlying mechanisms controlling such phenomenon, and subsequently develop related design-oriented expressions. However, existing predictive models have been developed and validated using li...
The superior performance of steel fibers (SFs) in enhancing the
shear capacity of reinforced concrete (RC) beams supports their use in regions that would otherwise require minimum shear reinforcement (stirrups). Subsequently, several researchers proposed different predictive models to capture the contribution of SFs to
the shear capacity of RC beam...
This study evaluated the shear behavior of lightweight self-consolidating concrete (LWSCC) beams strengthened with rubberized engineered cementitious composite (RECC). The RECC in this investigation, was developed with crumb RECC (CRECC) or powder RECC (PRECC). Four reinforced LWSCC beams layered with either CRECC or PRECC at the tension or compres...
This investigation evaluated the feasibility of combining lightweight concrete (LWC) and engineered cementitious composite (ECC) in specific configurations to develop a lightweight hybrid composite with improved impact resistance. In this study, three mixtures were investigated: one LWC mixture fully produced with lightweight fine and coarse expand...
This study investigated the structural behavior of large-scale normal concrete (NC) beams repaired with different fiber-reinforced cementitious composites (FRCC). To simulate the repair method, a specific layer of the NC beam was replaced by the FRCC in either the tension or compression zone. In this investigation, two types of FRCC were used, name...
This study evaluated the impact resistance and mechanical properties of a number of optimized self-consolidating concrete mixtures developed with lightweight expanded slate aggregate. The investigated parameters included different lightweight expanded slate types (fine and coarse), different aggregate volumes, and various binder contents (500, 550,...
This study investigated the effect of cold temperatures on impact resistance and mechanical properties of a number of self-consolidating and vibrated concretes. Different mixture compositions were developed and tested under compression, four-point bending, and drop-weight impact loading. All tests were conducted at four different temperatures: +20°...
This study aimed to optimize the use of fine and coarse expanded slate lightweight aggregates in developing successful semi-lightweight self-consolidating concrete (SLWSCC) mixtures with densities ranging from 1850 to 2000 kg/m3 (115.5 to 124.9 lb/ft3) and strength of at least 50 MPa (7.25 ksi). All SLWSCC mixtures were developed by replacing eithe...
This paper aims to evaluate and optimize a number of semilightweight self-consolidating concrete (SLWSCC) mixtures containing coarse and fine aggregates, lightweight expanded slate, and reinforced with different types of polymeric fiber. The fibers used were 8 and 12 mm polyvinyl alcohol (PVA8 and PVA12), and 19 mm polypropylene (PP19). The develop...
The shear behaviour of large-scale engineered cementitious composite (ECC) beams reinforced with different types of fibre was evaluated. Four types of fibre were used: 8 and 12 mm long polyvinyl alcohol fibres (PVA8 and PVA12), 19 mm long polypropylene fibres (PP19) and 13 mm long steel fibres (SF13). An additional normal concrete (NC) beam of comp...
This paper investigates the effect of replacing silica sand (SS) with waste rubber aggregates on the long-term mechanical and transport properties of structurally engineered cementitious composites (ECCs). ECC mixtures prepared with 0 to 30% crumb rubber sand (CRS) or 30% to 40% powder rubber sand (PRS) were tested for up to 360 days of curing. The...
This paper presents the results from an experimental program conducted to assess the cracking behavior of reinforced concrete beam-column connections cast with engineered cementitious composites (ECC). Reversed cyclic loading tests in conjunction with acoustic emission (AE) monitoring were completed on all specimens till failure. Four ECC mixtures...
This study evaluated the abrasion and impact resistance of a number of self-consolidating and vibrated concretes before and after exposure to freezing and thawing cycles in the presence of de-icing salts (salt scaling). The study investigated the effects of supplementary cementing materials (fly ash (FA), slag (SL), silica fume (SF), and metakaolin...
This study assessed the impact resistance of self-consolidating engineered cementitious composite (SCECC) using the American Concrete Institute (ACI) Committee 544’s repeated drop-weight impact test and flexural impact loading test. The investigation also evaluated the compressive strength, splitting tensile strength, flexural strength, and modulus...
This investigation aims to study the abrasion resistance of developed self-consolidating engineered cementitious composite (SCECC) mixtures using the rotating-cutter and sandblasting abrasion tests. The fresh and mechanical properties of the developed SCECC were also investigated in this study. Additional conventional self-consolidating concrete (S...
An experimental study was conducted to evaluate the mechanical properties, impact energy absorption, and abrasion resistance of engineered cementitious composite (ECC) reinforced with different fiber types. The impact resistance of the developed mixtures was assessed using ACI drop-weight and flexural impact loading tests. Rotating-cutter and sandb...
This paper investigates the effect of using different types of fiber on the behavior of engineered cementitious composite (ECC) beam-column joints under reversed cyclic loading. The tested ECC beam-column joints were cast with different types of fiber, including 8 mm and 12 mm polyvinyl alcohol fibers (PVA8 and PVA12), 13 mm polypropylene fibers (P...
This investigation was carried out to evaluate the combined effect of crumb rubber (CR) and steel fibers (SFs) on improving the impact resistance of self-consolidating concrete (SCC) mixtures. Seven SCC mixtures were developed with varied percentages of CR (0–15% by volume of sand) and SF’s volume of 0.35%. The performance of the developed mixtures...
This paper investigates the combined effect of crumb rubber (CR) and microsynthetic/macrosynthetic fibers on the shear behavior of reinforced concrete beams. Twelve large-scale self-consolidating and vibrated concrete beams were constructed with varied percentages of CR (0 to 30%) and different types and volumes (0, 0.2, and 1%) of synthetic fibers...
This study was conducted to evaluate the impact resistance and mechanical properties of self-consolidating rubberized concrete (SCRC) mixtures reinforced with synthetic fibers (SFs). In particular, the investigation aimed to maximize the impact resistance and energy absorption of SCRC mixtures by optimizing the mixture proportions and by using the...
This study aims to investigate the feasibility of utilizing waste rubber as a partial replacement for silica sand in the development of self-consolidating engineered cementitious composite (SCECC). The effects of the percentage of rubber (0–50%), rubber size [crumb rubber (CR) and powder rubber (PR)], and supplementary cementing materials (SCMs) (f...
This investigation was conducted to optimize the development of self-consolidating rubberized concrete (SCRC) reinforced with steel fibers (SFs). Specifically, the study aimed to use SFs to compensate for the reduction in splitting tensile and flexural strengths that resulted from adding high amounts of crumb rubber (CR) to SCRC mixtures. The study...
The present work was conducted to investigate the influence of crumb rubber (CR) with/without steel fibres (SFs) on shear behaviour and cracking of large-scale self-consolidating and vibrated concrete beams with no shear reinforcement. Twelve beams were developed with variables including different replacement levels of fine aggregate volume by CR (...
This paper presents experimental work to investigate the strength and cracking characteristics of optimised self-consolidating and vibrated rubberised concrete mixtures with/without steel fibres (SFs) using large-scale reinforced concrete beams. The test beams were cast with varying percentages of crumb rubber (CR) (0 to 35%), SF volume fractions (...
The aim of this study was to develop and optimise self-consolidating rubberised concrete (SCRC) modified by different types and volumes of synthetic fibres (SFs). Steel fibres were also tested in this investigation for comparison. The investigation particularly sought to utilise the beneficial effect of fibres to alleviate the reduction in splittin...
An experimental study was conducted to investigate the effect of using crumb rubber (CR) on improving the impact resistance and acoustic insulation of self-consolidating concrete mixtures. The study particularly aimed to maximize the percentage of CR in self-consolidating rubberized concrete (SCRC) to develop mixtures with high potential use in app...
This study evaluates the impact resistance and mechanical properties of a number of developed self-consolidating rubberized concrete (SCRC) mixtures reinforced with steel fibers (SFs). In this research, SFs were used to compensate for the reduction in tensile and flexural strength that resulted from adding high volumes of crumb rubber (CR). SFs wer...
This paper investigates the applicability of using optimized self-consolidating rubberized concrete (SCRC) and vibrated rubberized concrete (VRC) mixtures in structural applications. The curvature ductility, ultimate flexural strength, and cracking characteristics of different SCRC and VRC mixtures were tested using large-scale reinforced concrete...
This research aimed to investigate the mechanical properties of self-consolidating rubberized concrete (SCRC) mixtures with high percentages of crumb rubber (CR). The effect of metakaolin (MK) compared to other supplementary cementing materials (SCMs) on enhancing the mechanical properties and stability of SCRC mixtures was highlighted in this rese...
This research investigated the performance of full-scale self-consolidating rubberized concrete (SCRC) and vibrated rubberized concrete (VRC) beams in flexure. The beam mixtures were developed with a maximum possible percentage of crumb rubber (CR) (0 to 50% by volume of sand) while maintaining acceptable fresh properties and minimum strength reduc...
The effect of mixture composition and coarse aggregate density on the shear strength and cracking behavior of self-consolidating concrete (SCC) beams are presented in this study. The experimental test parameters included coarse/fine (C/FC/F) aggregate ratio (ranging from 0.7 to 1.2), coarse aggregate size (10 and 20 mm), coarse aggregate type/densi...
In this research, semi-lightweight normal-vibrated concrete (NVC) and self-consolidating concrete (SCC) mixtures were developed and tested to examine their fresh properties, mechanical performance, and shear resistance. The mixtures containing fly ash (FA) and/or metakaolin (MK) were developed using lightweight slag aggregate as a coarse aggregate...
The fresh and mechanical properties of self-consolidating concrete (SCC) with different mixture compositions and lightweight coarse aggregate were investigated in this study. The investigation included 28 normal-weight SCC (NWSCC) mixtures with varied coarse-to-fine (C/F) aggregate ratios (0.7–1.2), coarse aggregate size (10–20 mm), binder content...
An experimental investigation was conducted to study the development of self-consolidating rubberized concrete (SCRC) with improved flowability, passing ability, stability, and strength for multiple structural applications. The investigation particularly aimed to maximize the percentage of used crumb rubber (CR) in SCRC while minimizing the reducti...
The present work evaluates the fresh and mechanical properties of semi-lightweight self-consolidating concrete (SLWSCC) and compares the results with those of semi-lightweight normal concrete. Eleven mixtures containing lightweight slag aggregate with varying compressive strengths, coarse-to-fine (C/F) aggregate ratios, and total binder contents we...
End plate connections are widely used in steel structures, especially industrial buildings which may be susceptible to heavy loads and considerable seismic activities. These connections are used for column hinged bases, beam end plate connections, and beam flush moment connections. A finite element model has been established to evaluate the distrib...
Questions
Question (1)
Dear Colleagues,
It is my honor and privilege to be serving as the lead guest editor with Dr. Ahmed Elansary and Dr. Eslam Gomaa for the special issue of the MDPI journal "Materials, IF = 3.748" on the research topic "Geopolymers and Fiber-Reinforced Concrete Composites” Link to submission system: https://lnkd.in/gvTibXXd. This special issue will address advances in characterization, processing, scale-up, testing, and commercialization of various types of geopolymers and alkali-activated materials, as well as fiber-reinforced concrete composites. In this Special Issue, we welcome all research articles, case studies, and reviews aimed at enriching the available knowledge regarding such high-performance construction materials and highlighting the latest findings at both the material and structural levels. Topics of interest include but are not limited to the following:
- Application of steel, carbon, and polymeric fibers in concrete;
- Fiber-reinforced concrete and high-performance cement-based composites;
- Fiber hybridization;
- Fire resistance;
- Fresh, mechanical, and durability properties;
- Impact strength, bond, shear, flexural, cyclic, and cracking behavior;
- Geopolymers and alkali-activated materials (i.e., concrete, mortar, adhesives) for different market applications;
- Natural and recycled fibers;
- Numerical modeling;
- Repair applications;
- Proposing new classes of geopolymers and fiber-reinforced concrete;
- Small- and large-scale testing.
Dr. Mohamed K. Ismail
Dr. Ahmed A. Elansary
Dr. Eslam Gomaa
Guest Editors
