ahmed alsabbagh

@uoitc.edu.iq

College of Engineering
University of Information Technology and Communications

ahmed alsabbagh


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https://researchid.co/ahmedpave3

EDUCATION

M.Sc. in Transportation Engineering/ 2008/ University of Babylon/ Iraq.
M.Sc. in Geotechnical engineering/ 2018/ Florida Institute of Technology/ USA.
Ph.D. in Highway engineering/ 2020/ Florida Institute of Technology/ USA.

RESEARCH, TEACHING, or OTHER INTERESTS

Civil and Structural Engineering, Building and Construction
11

Scopus Publications

238

Scholar Citations

7

Scholar h-index

6

Scholar i10-index

Scopus Publications

  • Prediction of flexural capacity of fiber reinforced concrete slab on ground
    Abdullah Albogami, Nakin Suksawang, Ahmed Alsabbagh, Emad Alshammari
    Journal of Umm Al Qura University for Engineering and Architecture, 2025
    Slab-on-ground (SOG) serves as a fundamental structural element in contemporary buildings and infrastructure. In recent years, the adoption of fiber-reinforced concrete (FRC) for SOG has gained significant traction due to its enhanced mechanical performance and durability. The design methodologies for (SOG) primarily rely on the flexural slab capacity (FSC) to determine the required slab thickness. This process involves calculating the modulus of rupture (MOR) of the concrete beam, following the guidelines established by AASHTO T 97 or ASTM C78 standards. All prior experimental findings have demonstrated that the MOR is significantly lower than the FSC, indicating that it cannot be relied upon to accurately predict the FSC. Consequently, employing the MOR to predict FSC would result in an underestimation of the FSC, necessitating excessive thickness. Therefore, this study aims to develop a more accurate predictive equation for FSC by using MOR and key influencing parameters of SOG, ensuring a more efficient and optimized slab thickness design. The predictive equation is derived using statistical procedures based on an extensive dataset of over 100 SOG cases from previous literature. The findings indicate that the FSC is highly influenced by the MOR, subgrade reaction modulus (k), fiber volume content (Vf), concrete compressive strength (fc'), and SOG width (WSOG). In addition, the proposed equation is evaluated in comparison with the most widely utilized (MOR) equations. The study demonstrates that the proposed equation yields the highest accuracy in predictions, exhibiting a coefficient of variation of 40%, in contrast to 88% for the Eurocode equation and 84% for the ACI equation.
  • Thermal and Flood Resiliency Evaluation of Rigid Pavement Using Various Pavement Characteristics
    Emad Alshammari, Mang Tia, Othman Alanquri, Abdullah Albogami, Ahmed Alsabbagh, et al.
    Civileng, 2025
    Temperature variations have a significant impact on the performance and durability of rigid (concrete) pavement. As concrete is subjected to daily and seasonal temperature changes, it experiences thermal expansion and contraction. These movements, if not properly managed, can lead to cracking, joint deterioration, and loss of structural integrity. The pavement system is adversely affected by intense heat and significant flooding. This study aims to analyze the impact of several parameters on the performance of rigid pavement under typical, thermal, and flooding situations. This study investigates the properties of concrete and the dimensional design of rigid pavement with FEACONS IV software to assess their impact on the performance of concrete pavement during thermal and flooding conditions. The main conclusions of this study derived from the FEACONS IV analysis are as follows. Rigid pavement can enhance load-carrying capacity due to a lower elastic modulus, adequate flexural strength, and aggregates with a lower coefficient of thermal expansion. Increased thickness of concrete slabs and shorter slab lengths assist in minimizing load- and temperature-induced stresses. The increase in the subgrade modulus reaction value during flooding conditions improves pavement strength. However, in higher thermal conditions, a higher subgrade reaction modulus can increase the stress induced by temperature and load. Rigid pavement using porous limestone aggregate exhibits a reduced elastic modulus and coefficient of thermal expansion, suggesting higher resilience compared to rigid pavement composed of river gravel or granite. The findings suggest that higher thermal conditions will cause pavement damage. Agencies need to account for higher temperatures while designing and maintaining pavement. Flooding saturates the concrete pavement and subgrade layer, adversely affecting its performance over time.
  • Evaluation of concrete slab exposed to weather conditions resulting from global warming
    Emad ALSHAMMARI
    Materials Research Proceedings, 2025
    Global warming is increasing worldwide, leading to recurring climatic hazards each year. These hazards have a negative influence on the performance of infrastructure, most of which are inadequately prepared to resist the effects of climate change. Roadway system is being negatively impacted by the severe Global Warming, which is characterized by extreme heat and severe flooding. The objective of this study is to examine the impact of various factors on the performance of concrete pavement under varying weather conditions, including extreme heat and flooding. The goal is to create designs and tactics that will make concrete pavements more robust in these challenging circumstances. This research examines the characteristics of concrete and the dimensional configuration of concrete pavement using FEACONS IV to evaluate their influence on the concrete pavement’s performance under severe heat and flooding events. This study's main findings from FEACONS IV analysis are as follows. With a lower elastic modulus, sufficient flexural strength, and aggregates with a lower coefficient of thermal expansion, concrete pavement may have an increased load-carrying capacity Increasing Concrete slab thickness can reduce stress caused by load and temperature. Increased subgrade modulus reaction value under flooding circumstances enhances pavement strength. Nevertheless, under conditions of severe temperatures, a substantial subgrade reaction modulus has the potential to increase the stress caused by temperature and load. Concrete pavement with porous limestone aggregate shows a low coefficient of thermal expansion and elastic modulus, indicating that it could outperform concrete pavement made with river gravel or granite. The implications of the findings lead to increased temperatures which will result in the degradation of pavement. It is necessary for agencies to consider a rise in temperature when designing, constructing, and maintaining pavement. Flooding causes the concrete slab and subgrade layer of a pavement to become saturated, which negatively impacts the pavement's performance over time.
  • Comparative studies on interfacial bond performance of ultrahigh performance concrete (UHPC) for sustainable repair of bridges and pavements
    Bahaa H Al-Abbas, Ahmed Alsabbagh, Dhafer M. Hasan, Ali A. Semendary, Sriram Aaleti
    Results in Engineering, 2024
  • Evaluation the Yield and Ultimate Strain of FRC in Compression
    Salam Wtaife, Nakin Suksawang, Ahmed Alsabbagh
    Rilem Bookseries, 2021
  • Using post-cracking strength to determine flexural capacity of ultra-thin whitetopping (UTW) pavements
    Nakin Suksawang, Ahmed Alsabbagh, Alaa Shaban, Salam Wtaife
    Construction and Building Materials, 2020
  • Fracture Mechanism of Fibre Reinforced Concrete Pavement Based on a RILEM Design Approach
    Salam Wtaife, Ahmed Alsabbagh, Alaa M. Shaban, Nakin Suksawang
    Iop Conference Series Materials Science and Engineering, 2020
    Using fibre-reinforced concrete pavement (FRCP) offers excellent performance in terms of enhancing the concrete’s physical properties. The most popular fibres used in creating concrete for pavements are steel, polypropylene, and polyvinyl alcohol (PVA) fibres, though these come in a variety of geometries (lengths, shapes, sizes, and thickness). This paper utilises steel and PVA fibres at different low volume fractions to examine the improvement mechanism of FRC. The volume fractions of fibre (Vf) used were 0.04, 0.12, and 0.2 % and 0.3, 0.4, and 0.6% for PVA and steel hooked end fibres, respectively. There are many theoretical methods available for determining the effect of fibre inclusion on the load-carrying capacity of concrete pavements. One of these methods is analysing the stress-strain diagram (σ-ε method) according to RILEM TC-162-TDF. This paper used the (σ-ε) method to evaluate these types of fibre, showing that the stress-strain diagram, residual flexural tensile strength, and toughness are improved by adding both types of fibre. The improvement in fracture mechanisms enhances the ability of FRCP to bear stresses and moments, helping to avoid premature failure in the pavement. PVA FRC showed better performance than steel FRC in terms of supporting the external bending moment capacity, however, which reduces the thickness of the concrete required.
  • Effect of Pavement Foundation Materials on Rigid Pavement Response
    Alaa M. Shaban, Ahmed Alsabbagh, Salam Wtaife, Nakin Suksawang
    Iop Conference Series Materials Science and Engineering, 2020
    Rigid pavements are increasingly becoming a primary pavement type for highways under heavy traffic loading due to their long service life and less frequent requirements for maintenance compared to flexible pavements. The behaviour of a rigid pavement during service life is affected by several parameters such as applied loading features, pavement properties, environmental effects, and pavement foundation properties, which must be taken into account in the analysis and design of rigid pavements. The pavement foundation consists of base, subbase, and subgrade layers, all of which play substantial roles in the long-term performance of the rigid pavement. With the development of computer capacity, the three-dimensional finite element method (3D-FEM) has become a widely utilized tool for analysis of concrete structures such as pavements as it overcomes the limitations of analytical solutions. The main objective of this research is to evaluate the effects of pavement foundation characteristics on rigid pavement response using EverFE software. The parameters examined in this study included the thickness and properties of each layer of the pavement foundation. The analysis results revealed that, generally, stresses and settlements within rigid pavement are considerably reduced when a stiff or thick foundation is used. The analysis of results also showed that the tension bending stresses in the base layer decreased significantly with increases in the thickness of the base layer. It was also found that the addition of a subbase layer within the pavement foundation produced a significant reduction in the tension bending stresses in pavement and base layers with no in compression stresses in both layers noted.
  • Enhancement of Rigid Pavement Capacity Using Synthetic Discrete Fibers
    Ahmed Alsabbagh, Salam Wtaife, Alaa Shaban, Nakin Suksawang, Emad Alshammari
    Iop Conference Series Materials Science and Engineering, 2019
    Adding synthetic discrete fibers to unreinforced rigid pavements has been significantly increased during the last decades. Synthetic fibers improve flexural capacity, toughness, fatigue resistance, and durability, and reduce crack width. Most design methods of rigid pavements adopted modulus of rupture (i.e., flexural strength) as the primary parameter in the input design process. The elastic modulus of rupture, which has calculated depending on ASTM C78 formula does not reflect the benefits of the synthetic fiber. The effective modulus of rupture (MOR’) has been proposed to quantify the added capacity of fibers over unreinforced concrete, which is calculated depending on the equivalent flexural strength. This study aimed to determine the flexural capacity of rigid pavement, which included filtrated polypropylene discrete fibers. The concept of the effective modulus of rupture was adopted to calculate the capacity of rigid pavements. Adding Polypropylene in concrete reduced the compressive strength, modulus of elasticity, elastic modulus of rupture, while improves effective modulus of rupture and flexural toughness.
  • Effect of Hybrid Discrete Fibers on Mechanical Properties of FRC
    Salam Wtaife, Alaa Shaban, Ahmed Alsabbagh, Emad Alshammari, Nakin Suksawang
    Iop Conference Series Materials Science and Engineering, 2018
    Combining micro and macro fibers provide high performance of fiber reinforced concrete before and after concrete matrix cracks. Concretes including different volume content of hybrid discrete fibers were evaluated regarding compressive, elastic modulus, and tensile splitting strength. Eight cases include seven types of hybrid composites that were constructed using fiber combinations of PVA and Polyolefin fibers. Test results showed that the PVA, Polyolefin, hybrid fibers reduce the compressive strength properties of concrete, especially with high volume content (2%). On the other hand, hybrid fibers improve significantly the tensile strength of concrete that leads to change the concrete behavior from brittle materials to ductile.
  • Evaluation of elastic modulus of fiber-reinforced concrete
    Nakin Suksawang, Salam Wtaife, Ahmed Alsabbagh
    ACI Materials Journal, 2018

RECENT SCHOLAR PUBLICATIONS

  • Prediction of flexural capacity of fiber reinforced concrete slab on ground
    A Albogami, N Suksawang, A Alsabbagh, E Alshammari
    Journal of Umm Al-Qura University for Engineering and Architecture 16 (4 … , 2025
    2025
    Citations: 4
  • Thermal and Flood Resiliency Evaluation of Rigid Pavement Using Various Pavement Characteristics
    E Alshammari, M Tia, O Alanquri, A Albogami, A Alsabbagh, RS Alrashidi
    CivilEng 6 (2), 22 , 2025
    2025
    Citations: 3
  • Evaluation of concrete slab exposed to weather conditions resulting from global warming
    AA Emad Alshammari, Mang Tia, Ahmed Alsabbagh, Othman Alanquri
    1st International Conference on Civil and Environmental Engineering for … , 2025
    2025
  • Comparative studies on interfacial bond performance of ultrahigh performance concrete (UHPC) for sustainable repair of bridges and pavements
    BH Al-Abbas, A Alsabbagh, DM Hasan, AA Semendary, S Aaleti
    Results in Engineering 24, 103525 , 2024
    2024
    Citations: 17
  • Impact of PVA Fiber on Mechanical Properties of Concrete and Cement Composites
    NS Salam Wtaife, Ahmed Alsabbagh
    FRC2023: Fiber Reinforced Concrete: from Design to Structural Applications … , 2023
    2023
  • Improving Flexural Capacity of Ultra-thin Whitetopping (UTW) Pavements by Adding Polyvinyl Alcohol (PVA) Discrete Fibers
    NS Ahmed Alsabbagh, Salam Wtaife, Alaa M. Shaban
    FRC2023: Fiber Reinforced Concrete: from Design to Structural Applications … , 2023
    2023
  • Impact of PVA Fiber on Mechanical Properties of Concrete and Cement Composites
    S Wtaife, A Alsabbagh, N Suksawang
    Fiber Reinforced Concrete: from Design to Structural Applications , 2023
    2023
    Citations: 1
  • Improving Bond Strength of Bonded Concrete Overlay by Adding Synthetic Discrete Fibers.
    E Alshammari, N Suksawang, A Alsabbagh, S Wtaife
    International Journal of Technology & Engineering Studies 8 (1) , 2022
    2022
    Citations: 1
  • Evaluation the Yield and Ultimate Strain of FRC in Compression
    S Wtaife, N Suksawang, A Alsabbagh
    RILEM-fib International Symposium on Fibre Reinforced Concrete, 111-122 , 2020
    2020
  • Using post-cracking strength to determine flexural capacity of ultra-thin whitetopping (UTW) pavements
    N Suksawang, A Alsabbagh, A Shaban, S Wtaife
    Construction and Building Materials 240, 117831 , 2020
    2020
    Citations: 17
  • Development of a Design Method for Bonded Concrete Pavement Overlays
    A Al Sabbagh
    Florida Institute of Technology , 2020
    2020
    Citations: 2
  • Effect of pavement foundation materials on rigid pavement response
    AM Shaban, A Alsabbagh, S Wtaife, N Suksawang
    IOP Conference Series: Materials Science and Engineering 671 (1), 012085 , 2020
    2020
    Citations: 36
  • Fracture mechanism of fibre reinforced concrete pavement based on a RILEM design approach
    S Wtaife, A Alsabbagh, AM Shaban, N Suksawang
    IOP Conference Series: Materials Science and Engineering 671 (1), 012087 , 2020
    2020
    Citations: 3
  • Enhancement of rigid pavement capacity using synthetic discrete fibers
    A Alsabbagh, S Wtaife, A Shaban, N Suksawang, E Alshammari
    IOP Conference Series: Materials Science and Engineering 584 (1), 012033 , 2019
    2019
    Citations: 13
  • Effect of Fiber on Tensile Bond Strength of Bonded Concrete Overlays
    EA Nakin Suksawang, Ahmed Alsabbagh, Salam Wtaife, Alaa Shaban
    Structures Congress 2019 (ASCE SEI) in Orlando, Florida , 2019
    2019
  • Effect of Polypropylene Fibers on Serviceability and Ultimate Limit States on Fiber Reinforced Concrete Behavior
    S Wtaife, A Alsabbagh, T Eissa, E Alshammari, A Shaban, N Suksawang
    2019
    Citations: 1
  • Effect of hybrid discrete fibers on mechanical properties of frc
    S Wtaife, A Shaban, A Alsabbagh, E Alshammari, N Suksawang
    IOP Conference Series: Materials Science and Engineering 454 (1), 012170 , 2018
    2018
    Citations: 13
  • Analysis of flexural capacity of fiber reinforced concrete pavements
    S Wtaife, A Alsabbagh, T Essa, E Alshammari, A Shaban, N Suksawang
    International Journal of Technology and Engineering Studies 4 (6), 203-210 , 2018
    2018
    Citations: 8
  • Using PVA to Improve Concrete Behavior during Different Stages of Flexural Test
    NS Salam Wtaife, Ahmed Alsabbagh
    ACI The Concrete Convention and Exposition , 2018
    2018
  • Evaluation of elastic modulus of fiber-reinforced concrete
    N Suksawang, S Wtaife, A Alsabbagh
    ACI Materials Journal 115 (2), 239 , 2018
    2018
    Citations: 119

MOST CITED SCHOLAR PUBLICATIONS

  • Evaluation of elastic modulus of fiber-reinforced concrete
    N Suksawang, S Wtaife, A Alsabbagh
    ACI Materials Journal 115 (2), 239 , 2018
    2018
    Citations: 119
  • Effect of pavement foundation materials on rigid pavement response
    AM Shaban, A Alsabbagh, S Wtaife, N Suksawang
    IOP Conference Series: Materials Science and Engineering 671 (1), 012085 , 2020
    2020
    Citations: 36
  • Comparative studies on interfacial bond performance of ultrahigh performance concrete (UHPC) for sustainable repair of bridges and pavements
    BH Al-Abbas, A Alsabbagh, DM Hasan, AA Semendary, S Aaleti
    Results in Engineering 24, 103525 , 2024
    2024
    Citations: 17
  • Using post-cracking strength to determine flexural capacity of ultra-thin whitetopping (UTW) pavements
    N Suksawang, A Alsabbagh, A Shaban, S Wtaife
    Construction and Building Materials 240, 117831 , 2020
    2020
    Citations: 17
  • Enhancement of rigid pavement capacity using synthetic discrete fibers
    A Alsabbagh, S Wtaife, A Shaban, N Suksawang, E Alshammari
    IOP Conference Series: Materials Science and Engineering 584 (1), 012033 , 2019
    2019
    Citations: 13
  • Effect of hybrid discrete fibers on mechanical properties of frc
    S Wtaife, A Shaban, A Alsabbagh, E Alshammari, N Suksawang
    IOP Conference Series: Materials Science and Engineering 454 (1), 012170 , 2018
    2018
    Citations: 13
  • Analysis of flexural capacity of fiber reinforced concrete pavements
    S Wtaife, A Alsabbagh, T Essa, E Alshammari, A Shaban, N Suksawang
    International Journal of Technology and Engineering Studies 4 (6), 203-210 , 2018
    2018
    Citations: 8
  • Prediction of flexural capacity of fiber reinforced concrete slab on ground
    A Albogami, N Suksawang, A Alsabbagh, E Alshammari
    Journal of Umm Al-Qura University for Engineering and Architecture 16 (4 … , 2025
    2025
    Citations: 4
  • Thermal and Flood Resiliency Evaluation of Rigid Pavement Using Various Pavement Characteristics
    E Alshammari, M Tia, O Alanquri, A Albogami, A Alsabbagh, RS Alrashidi
    CivilEng 6 (2), 22 , 2025
    2025
    Citations: 3
  • Fracture mechanism of fibre reinforced concrete pavement based on a RILEM design approach
    S Wtaife, A Alsabbagh, AM Shaban, N Suksawang
    IOP Conference Series: Materials Science and Engineering 671 (1), 012087 , 2020
    2020
    Citations: 3
  • Development of a Design Method for Bonded Concrete Pavement Overlays
    A Al Sabbagh
    Florida Institute of Technology , 2020
    2020
    Citations: 2
  • Impact of PVA Fiber on Mechanical Properties of Concrete and Cement Composites
    S Wtaife, A Alsabbagh, N Suksawang
    Fiber Reinforced Concrete: from Design to Structural Applications , 2023
    2023
    Citations: 1
  • Improving Bond Strength of Bonded Concrete Overlay by Adding Synthetic Discrete Fibers.
    E Alshammari, N Suksawang, A Alsabbagh, S Wtaife
    International Journal of Technology & Engineering Studies 8 (1) , 2022
    2022
    Citations: 1
  • Effect of Polypropylene Fibers on Serviceability and Ultimate Limit States on Fiber Reinforced Concrete Behavior
    S Wtaife, A Alsabbagh, T Eissa, E Alshammari, A Shaban, N Suksawang
    2019
    Citations: 1
  • Evaluation of concrete slab exposed to weather conditions resulting from global warming
    AA Emad Alshammari, Mang Tia, Ahmed Alsabbagh, Othman Alanquri
    1st International Conference on Civil and Environmental Engineering for … , 2025
    2025
  • Impact of PVA Fiber on Mechanical Properties of Concrete and Cement Composites
    NS Salam Wtaife, Ahmed Alsabbagh
    FRC2023: Fiber Reinforced Concrete: from Design to Structural Applications … , 2023
    2023
  • Improving Flexural Capacity of Ultra-thin Whitetopping (UTW) Pavements by Adding Polyvinyl Alcohol (PVA) Discrete Fibers
    NS Ahmed Alsabbagh, Salam Wtaife, Alaa M. Shaban
    FRC2023: Fiber Reinforced Concrete: from Design to Structural Applications … , 2023
    2023
  • Evaluation the Yield and Ultimate Strain of FRC in Compression
    S Wtaife, N Suksawang, A Alsabbagh
    RILEM-fib International Symposium on Fibre Reinforced Concrete, 111-122 , 2020
    2020
  • Effect of Fiber on Tensile Bond Strength of Bonded Concrete Overlays
    EA Nakin Suksawang, Ahmed Alsabbagh, Salam Wtaife, Alaa Shaban
    Structures Congress 2019 (ASCE SEI) in Orlando, Florida , 2019
    2019
  • Using PVA to Improve Concrete Behavior during Different Stages of Flexural Test
    NS Salam Wtaife, Ahmed Alsabbagh
    ACI The Concrete Convention and Exposition , 2018
    2018