Climate Change Impact on Coastal Structures in the MENA Region

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Construction Engineering Department

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Construction Engineering Department

Third Author's Department

Construction Engineering Department

Fourth Author's Department

Construction Engineering Department

Fifth Author's Department

Construction Engineering Department

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https://doi.org/10.1007/978-3-031-61511-5_15

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Daniel Doss, Donia Mohamed, Mariam Mekhail, Nouray El Mahalloui, Veronica Mina, Youssef Elsherbini, Donia Eldwib, Mayer Farag, Bishoy Kamel, Safwan Khedr, Mohamed Abou-Zeid

Document Type

Research Article

Publication Title

Lecture Notes in Civil Engineering

Publication Date

1-1-2024

doi

10.1007/978-3-031-61511-5_15

Abstract

Climate change is a catastrophic phenomenon that negatively impacts the planet. Temperature variation is a major cause of climate change which results in melting glaciers and expanding waterbodies leading to increasing sea water levels. The Mediterranean coastline is at risk of flooding, shoreline erosion, and intrusion of seawater into the groundwater table due to the increase of seawater levels placing our coastal structures in danger. To alleviate the negative impacts of climate change, several preventive and remedial measures will be proposed and assessed using a simulation to compare them with the already existing conditions of a case study in Alexandria, Egypt. The objective of this study is to investigate the possibility of protecting coastal structures against the increasing effects of climate change by using an environmentally friendly, low-permeability concrete mix design to endure the chloride attacks in the sea water. Furthermore, soil injections using polyurethane will be analyzed to validate their effectiveness in decreasing the soil porosity protecting the structure’s foundations against the seepage of sea water into the groundwater as it rises. Several concrete mixes incorporating metakaolin, a pozzolanic material to reduce permeability, with 5 and 10% replacement of the ordinary Portland cement will be studied. Moreover, the potential use of geopolymer concrete consisting of fly ash, sodium hydroxide, and sodium silicate as a binder will also be assessed through three different mixes with varying molarities and alkaline-activator solution-to-fly ash ratios and compared to the metakaolin mixes. To evaluate the performance of the aforementioned mixes, several fresh tests as well as hardened tests were conducted. Results reveal that the mixes achieve superior mechanical properties when compared to ordinary Portland concrete, namely, higher compressive and tensile strength in addition to increasing durability. As for the early concrete properties, both the geopolymer and metakaolin concrete mixes exhibit a considerable amount of full strength during the first 7 days. Regarding the soil impregnation, polyurethane was successful in reducing the soil permeability by a thousand times. In line with the previous results, it was concluded that such actions are indispensable to alleviate the negative impacts of climate change.

First Page

177

Last Page

191

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Conference Paper. Record derived from SCOPUS.

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