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Dr. AHMED SOLIMAN
Building, Civil, and Environmental Engineering, Concordia University, Quebec, Canada

Basic Info

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Research Keywords & Expertise

0 green materials
0 Eco-Friendly Construction Materials
0 Cement and concrete technology
0 Alternative cement
0 Smart and nano-modified construction materials

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Career Timeline

Concordia University

University Educator/Researcher

01 June 2016 - 30 August 2021




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Journal article
Published: 12 March 2021 in Sustainability
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This paper aims to investigate the effect of fine recycled concrete powder (FRCP) on the strength of self-compacting concrete (SCC). For this purpose, a numerical artificial neural network (ANN) model was developed for strength prediction of SCC incorporating FRCP. At first, 240 experimental data sets were selected from the literature to develop the model. Approximately 60% of the database was used for training, 20% for testing, and the remaining 20% for the validation step. Model inputs included binder content, water/binder ratio, recycled concrete aggregates’ (RCA) content, percentage of supplementary cementitious materials (fly ash), amount of FRCP, and curing time. The model provided reliable results with mean square error (MSE) and regression values of 0.01 and 0.97, respectively. Additionally, to further validate the model, four experimental recycled self-compacting concrete (RSCC) samples were tested experimentally, and their properties were used as unseen data to the model. The results showed that the developed model can predict the compressive strength of RSCC with high accuracy.

ACS Style

Sara Boudali; Bahira Abdulsalam; Amir Rafiean; Sébastien Poncet; Ahmed Soliman; Adel ElSafty. Influence of Fine Recycled Concrete Powder on the Compressive Strength of Self-Compacting Concrete (SCC) Using Artificial Neural Network. Sustainability 2021, 13, 3111 .

AMA Style

Sara Boudali, Bahira Abdulsalam, Amir Rafiean, Sébastien Poncet, Ahmed Soliman, Adel ElSafty. Influence of Fine Recycled Concrete Powder on the Compressive Strength of Self-Compacting Concrete (SCC) Using Artificial Neural Network. Sustainability. 2021; 13 (6):3111.

Chicago/Turabian Style

Sara Boudali; Bahira Abdulsalam; Amir Rafiean; Sébastien Poncet; Ahmed Soliman; Adel ElSafty. 2021. "Influence of Fine Recycled Concrete Powder on the Compressive Strength of Self-Compacting Concrete (SCC) Using Artificial Neural Network." Sustainability 13, no. 6: 3111.

Journal article
Published: 05 February 2021 in Construction and Building Materials
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This study investigated the potential of unifying construction and agricultural sectors’ goals to meet the global demand for green construction implementation. Saving natural resources and solving waste disposal of issues, through utilizing agriculture waste as a replacement for natural aggregate was adopted. Environmental-friendly controlled low strength materials (CLSMs) using alkali-activated binders as a replacement for regular cement was selected as a green application. Fresh, hardened and durability performance for mixtures with various agriculture waste contents (i.e. 0% up to 40% as replacement of fine natural aggregate) and binder activation levels were evaluated. Results reveal that increasing the agriculture waste content (i.e. >10%) increased the potential to achieve a lightweight green CLSM. All CLSM mixtures had exhibited strength below 8.3 MPa, satisfying the strength requirements for structural filling according to ACI committee 229. Only mixtures with agriculture waste contents >20% meet the desired strength for future re-excavation CLSMs (i.e. 2.1 MPa). Hence, low strength requirements for CLSMs had accommodated the strength reduction induced by agriculture waste addition. The findings pave the way for a wider implementation of agriculture wastes in green construction, providing economic and environmental benefits for both construction and agriculture sectors.

ACS Style

D. Ahadzadeh Ghanad; A.M. Soliman. Bio-based alkali-activated controlled low strength material: Engineering properties. Construction and Building Materials 2021, 279, 122445 .

AMA Style

D. Ahadzadeh Ghanad, A.M. Soliman. Bio-based alkali-activated controlled low strength material: Engineering properties. Construction and Building Materials. 2021; 279 ():122445.

Chicago/Turabian Style

D. Ahadzadeh Ghanad; A.M. Soliman. 2021. "Bio-based alkali-activated controlled low strength material: Engineering properties." Construction and Building Materials 279, no. : 122445.

Journal article
Published: 29 October 2020 in Construction and Building Materials
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Alkali-silica reaction (ASR) is considered one of the most critical internal damaging mechanisms for concrete. Several specifications and testing methods have been used to evaluate concrete performance, undergoing ASR damage. This had led to enormous data in the literature, yet some are contradictory. Hence, the significances of geometry, casting direction, size of specimens, and triggering materials contents on the measured ASR behavior were investigated. The study was able to highlight the correlations between the various tested parameters. Moreover, results revealed that the cylindrical specimens exhibited a higher expansion than that of the prismatic specimens by about 9−40%. Vertically cast specimens exhibited an increase in expansion over the others cast horizontally in the range from 3% to 9% based on measuring time. Moreover, increasing the volume of specimens lowered the expansion. Adding Fused silica reveals a higher increase in expansion in the mortar and concrete specimens than that with reactive aggregate only. However, the properties of Fused silica will differ the optimum percentage. The findings of this study emphasize various parameters that engineers need to consider while dealing with ASR results.

ACS Style

S.H. Diab; A.M. Soliman; M.R. Nokken. Effect of triggering material, size, and casting direction on ASR expansion of cementitious materials. Construction and Building Materials 2020, 269, 121323 .

AMA Style

S.H. Diab, A.M. Soliman, M.R. Nokken. Effect of triggering material, size, and casting direction on ASR expansion of cementitious materials. Construction and Building Materials. 2020; 269 ():121323.

Chicago/Turabian Style

S.H. Diab; A.M. Soliman; M.R. Nokken. 2020. "Effect of triggering material, size, and casting direction on ASR expansion of cementitious materials." Construction and Building Materials 269, no. : 121323.

Journal article
Published: 16 October 2020 in Journal of Sustainable Cement-Based Materials
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ACS Style

Wala’A Al Makhadmeh; Ahmed Soliman. Effect of activator nature on property development of alkali-activated slag binders. Journal of Sustainable Cement-Based Materials 2020, 1 -17.

AMA Style

Wala’A Al Makhadmeh, Ahmed Soliman. Effect of activator nature on property development of alkali-activated slag binders. Journal of Sustainable Cement-Based Materials. 2020; ():1-17.

Chicago/Turabian Style

Wala’A Al Makhadmeh; Ahmed Soliman. 2020. "Effect of activator nature on property development of alkali-activated slag binders." Journal of Sustainable Cement-Based Materials , no. : 1-17.

Journal article
Published: 01 October 2020 in Construction and Building Materials
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This research compares the efficiency of basalt fiber reinforcement polymer mesh (BFM) and glass fiber reinforcement polymer mesh (GFM) to suppress ASR-Expansion and enhance the mechanical properties of ASR-damaged concrete. BFM has not often been utilized for concrete confinement but is significantly less expensive than GFM. Results showed that the level of the expansion of damaged concrete prior to strengthening would dominate the performance rather than the materials. Early application of BFM and GFM resulted in a 25% reduction in expansion. In addition, an increase in compressive strength in the range from 4.6% to 39% and from 6.5% to 50% for BFM and GFM, respectively, depending mainly on the expansion at the time of strengthening and time since strengthening. An increase in modulus of elasticity by about 14% and a decrease in the Poisson’s ratio by about 23% compared with control specimens were obtained.

ACS Style

S.H. Diab; A.M. Soliman; M.R. Nokken. Feasibility of basalt and glass FRP mesh for strengthening and confinement concrete damage due to ASR-expansion. Construction and Building Materials 2020, 266, 120893 .

AMA Style

S.H. Diab, A.M. Soliman, M.R. Nokken. Feasibility of basalt and glass FRP mesh for strengthening and confinement concrete damage due to ASR-expansion. Construction and Building Materials. 2020; 266 ():120893.

Chicago/Turabian Style

S.H. Diab; A.M. Soliman; M.R. Nokken. 2020. "Feasibility of basalt and glass FRP mesh for strengthening and confinement concrete damage due to ASR-expansion." Construction and Building Materials 266, no. : 120893.

Journal article
Published: 22 September 2020 in Construction and Building Materials
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This study investigates the feasibility of enhancing construction materials sustainability using bio-based by-products as a partial replacement for natural sand. Controlled low strength material (CLSM) was selected as a practical application, thanks to its low strength requirements. The fine black spruce residual was added to different strength levels CLSM mixtures at rates 0%, 5%, 10%, and 20% as a partial replacement of natural sand. Fresh and hardened properties, including flowability, bleeding, density, compressive and tensile strengths, were evaluated. CLSM mixtures incorporating fine black spruce residuals were exposed to sulfate environment to examine their durability. The experimental results demonstrate that adding spruce-residuals had reduced the compressive strength; however, this reduction was within the acceptable limit. Moreover, results indicated that mixtures with high cement content could incorporate >20% spruce-residuals while maintaining adequate performance. The fine spruce-residuals have some filling effect and can reduce the pores leading to lower absorption rates. Dry/wet cycles will adversely affect the volume stability of CLSM, forming wide cracks that, in turn, accelerate degradation. Producing CLSM for farm applications is a feasible method for reusing such waste.

ACS Style

D. Ahadzadeh Ghanad; A. Soliman; S. Godbout; J. Palacios. Properties of bio-based controlled low strength materials. Construction and Building Materials 2020, 262, 120742 .

AMA Style

D. Ahadzadeh Ghanad, A. Soliman, S. Godbout, J. Palacios. Properties of bio-based controlled low strength materials. Construction and Building Materials. 2020; 262 ():120742.

Chicago/Turabian Style

D. Ahadzadeh Ghanad; A. Soliman; S. Godbout; J. Palacios. 2020. "Properties of bio-based controlled low strength materials." Construction and Building Materials 262, no. : 120742.

Journal article
Published: 21 May 2020 in Construction and Building Materials
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Cement is the main binding material for many military and civilian applications. The response of cement-based materials to kinetic energy, transferred by impact loads, always had attracted researchers working in the protective structures field. As an immerging binding material, alkali-activated material responses to different types of loads, especially dynamic loads, have to be studied. In this study, the effects of activator nature (i.e. silicate modulus (Ms) and sodium oxide dosage (Na2O%)) on the impact performance of alkali-activated slag (AAS) was investigated. Initially, fresh and hardened properties were evaluated for mixtures with various Ms and Na2O% values to ensure adequality. The impact absorption assessment was performed using a drop weight test. Results show that AAS exhibited up to 70% and 40% better compressive and tensile strength compared to that of the OPC, respectively. For impact energy absorption, AAS mixtures were obviously better than that of the conventional cement-based materials. The relationship between the static and dynamic performance of AAS is not similar to that in cement-based materials. Deformations and energy absorptions of AAS under impact loads are significantly affected by activator nature. Increasing the Modulus up to 1.5 resulted in about 75% enhancement in the impact energy absorption comparing to that of Ms = 1.

ACS Style

A.E. Abubakr; A.M. Soliman; S.H. Diab. Effect of activator nature on the impact behaviour of Alkali-Activated slag mortar. Construction and Building Materials 2020, 257, 119531 .

AMA Style

A.E. Abubakr, A.M. Soliman, S.H. Diab. Effect of activator nature on the impact behaviour of Alkali-Activated slag mortar. Construction and Building Materials. 2020; 257 ():119531.

Chicago/Turabian Style

A.E. Abubakr; A.M. Soliman; S.H. Diab. 2020. "Effect of activator nature on the impact behaviour of Alkali-Activated slag mortar." Construction and Building Materials 257, no. : 119531.

Journal article
Published: 08 April 2020 in Construction and Building Materials
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This research focuses on correlating the degree of expansion as a result of Alkali-Silica Reaction to mechanical properties and durability indices of hardened concrete. Degradation of six concrete mixtures incorporating Spratt aggregate with and without fused silica stored at 38 °C and 95 ± 5% RH were monitored for 12 months. Compressive and tensile strength decreased with time and the decreases became very significant as expansion progressed. There was no overall relationship found between strength and expansion for all mixtures. Linear correlations were observed between expansion with a modulus of elasticity and Poisson’s ratio. Both the Stiffness Damage Index and the Plasticity Index show notable increases up to approximately 0.4% expansion with small increases beyond that level. Ultrasonic pulse velocity showed a strong correlation to expansion regardless of the mixture. Rapid chloride permeability showed an increase in the total charge passed as a function of time, and hyperbolic relationships best expressed the correlation between Rapid chloride penetration and expansion tests.

ACS Style

S.H. Diab; A.M. Soliman; M.R. Nokken. Changes in mechanical properties and durability indices of concrete undergoing ASR expansion. Construction and Building Materials 2020, 251, 118951 .

AMA Style

S.H. Diab, A.M. Soliman, M.R. Nokken. Changes in mechanical properties and durability indices of concrete undergoing ASR expansion. Construction and Building Materials. 2020; 251 ():118951.

Chicago/Turabian Style

S.H. Diab; A.M. Soliman; M.R. Nokken. 2020. "Changes in mechanical properties and durability indices of concrete undergoing ASR expansion." Construction and Building Materials 251, no. : 118951.

Journal article
Published: 28 February 2020 in Construction and Building Materials
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Recently, many composite materials have been used to strengthen and extend the service life for deteriorated concrete; particularly in the case of alkali-silica expansion (ASR). This study compares the effectiveness of carbon fiber reinforcement polymer (CFRP) and basalt fiber reinforcement polymer (BFRP) as strengthening materials for ASR-damaged concrete. Sensitivity for strengthening time and corresponding residual properties, including expansion, compressive strength, modulus of elasticity, Poisson’s ratio, and stiffness damage index were evaluated on specimens strengthened by both materials. Results reveal that the degree of expansion at the strengthening time has a higher impact on the performance of strengthened structures than that of the used strengthening materials properties. Early application of CFRP and BFRP reveal 32% and 27% reduction in expansion, respectively. The same performance of concrete specimens can be maintained through the proper selection of the strengthening materials and strengthening time. It is anticipated that these results pave the way for wider implementations for various types of fiber reinforcement polymer in strengthening applications.

ACS Style

S.H. Diab; A.M. Soliman; M. Nokken. Exterior strengthening for ASR damaged concrete: A comparative study of carbon and basalt FRP. Construction and Building Materials 2020, 235, 117435 .

AMA Style

S.H. Diab, A.M. Soliman, M. Nokken. Exterior strengthening for ASR damaged concrete: A comparative study of carbon and basalt FRP. Construction and Building Materials. 2020; 235 ():117435.

Chicago/Turabian Style

S.H. Diab; A.M. Soliman; M. Nokken. 2020. "Exterior strengthening for ASR damaged concrete: A comparative study of carbon and basalt FRP." Construction and Building Materials 235, no. : 117435.

Journal article
Published: 28 September 2019 in Journal of Building Engineering
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Implementing waste materials in construction applications represents an effective solution for many waste management problems. This study presents an innovative solution for application of treated oil sands waste (TOSW) in grout mixtures used for micropiles construction. Effects of employing these grout mixtures on micropiles cross-section, surface interface properties and axial behaviour were investigated. The results showed an enhancement in the grout body diameter for micropiles installed using the developed grout, while maintaining the micropile surface properties. Micropiles installed using grout incorporating a high percentage of the TOSW (up to 30%) exhibited the same axial behaviour as that of micropile installed using conventional grout. Therefore, incorporating TOSW in micropile applications has high potential for producing cost efficient micropiles along with providing a green oil sands waste management solution.

ACS Style

M. Aboutabikh; A.M. Soliman; M.H. El Naggar. Performance of hollow bar micropiles using green grout incorporating treated oil sand waste. Journal of Building Engineering 2019, 27, 100964 .

AMA Style

M. Aboutabikh, A.M. Soliman, M.H. El Naggar. Performance of hollow bar micropiles using green grout incorporating treated oil sand waste. Journal of Building Engineering. 2019; 27 ():100964.

Chicago/Turabian Style

M. Aboutabikh; A.M. Soliman; M.H. El Naggar. 2019. "Performance of hollow bar micropiles using green grout incorporating treated oil sand waste." Journal of Building Engineering 27, no. : 100964.

Journal article
Published: 05 September 2018 in Journal of Cleaner Production
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The environmental and ecological impacts associated with concrete industry represent a major sustainability challenge. However, employing materials that would otherwise be considered waste in designing concrete mixtures can increase its sustainability along with reducing harmful impact of waste disposal. Therefore, this study attempts to increase concrete sustainable benefits through reusing treated oil sand waste (TOSW) as a replacement for natural sand. Concrete mixture for continuous flight auger (CFA) piles was selected in order to examine the practicality of the proposed technique. Fresh and hardened properties along with durability performance of CFA concrete mixtures incorporating 10%, 20%, 30% and 40% TOSW as partial replacement of sand were investigated. Results show that the incorporation of TOSW, up to 30%, did not adversely affect the performance of CFA concrete mixtures. Moreover, the leaching of heavy metals from tested concrete was very low leading to a less harmful environment impact. Reusing of TOSW as partial replacement for sand in concrete mixtures for CFA piles is potentially feasible with environmental ecological and economic benefits.

ACS Style

Mahmoud Kassem; Ahmed Soliman; Hesham El Naggar. Sustainable approach for recycling treated oil sand waste in concrete: Engineering properties and potential applications. Journal of Cleaner Production 2018, 204, 50 -59.

AMA Style

Mahmoud Kassem, Ahmed Soliman, Hesham El Naggar. Sustainable approach for recycling treated oil sand waste in concrete: Engineering properties and potential applications. Journal of Cleaner Production. 2018; 204 ():50-59.

Chicago/Turabian Style

Mahmoud Kassem; Ahmed Soliman; Hesham El Naggar. 2018. "Sustainable approach for recycling treated oil sand waste in concrete: Engineering properties and potential applications." Journal of Cleaner Production 204, no. : 50-59.

Journal article
Published: 01 October 2016 in Construction and Building Materials
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The present study investigates the performance of self-compacting concrete (SCC) and self-compacting sand concrete (SCSC) incorporating recycled concrete fines and aggregate under different sulphate environments. Similar mixtures incorporating natural aggregates and natural pozzolana were also tested for comparison. Different sulphate attack regimes (i.e. fully submerged and immersion-drying cycles) were applied. Compressive strength development/degradation under sulphate attack was monitored for all tested mixtures. Results indicate that the use of recycled materials did not significantly affect the strength development with respect to mixtures with natural materials. Moreover, mixtures incorporating recycled concrete aggregate and fine recycled concrete exhibited a better sulphate resistance behaviour than those with natural aggregates and natural pozzolana. In conclusion, the quality of the used recycled materials is a key factor in producing green and sustainable self-compacting concrete.

ACS Style

S. Boudali; D.E. Kerdal; K. Ayed; B. Abdulsalam; A.M. Soliman. Performance of self-compacting concrete incorporating recycled concrete fines and aggregate exposed to sulphate attack. Construction and Building Materials 2016, 124, 705 -713.

AMA Style

S. Boudali, D.E. Kerdal, K. Ayed, B. Abdulsalam, A.M. Soliman. Performance of self-compacting concrete incorporating recycled concrete fines and aggregate exposed to sulphate attack. Construction and Building Materials. 2016; 124 ():705-713.

Chicago/Turabian Style

S. Boudali; D.E. Kerdal; K. Ayed; B. Abdulsalam; A.M. Soliman. 2016. "Performance of self-compacting concrete incorporating recycled concrete fines and aggregate exposed to sulphate attack." Construction and Building Materials 124, no. : 705-713.