Restoration, Strengthening & Forensics

Service Overview

IEG – Hazem ElTahan & Associates applies PhD-level diagnostic precision to every structural restoration and forensic engineering challenge. Hazem ElTahan, PhD’s doctoral research at Heriot-Watt University was specifically focused on the nonlinear assessment and strengthening of existing reinforced concrete structures, including bridge half-joints — making IEG a specialist authority in this field.

Our restoration and forensic engineering practice draws on extensive real-world experience including the structural assessment and reinforcement of world-class heritage sites such as the Shoura Council building, the Al-Zahir Baybars Mosque (273 Million EGP), and the Al-Shouni Mosque in Old Cairo. Each project required a bespoke combination of forensic diagnosis, advanced strengthening techniques, and careful preservation of historical architectural character.

We combine non-destructive testing (NDT), advanced numerical modelling, and proven intervention techniques including FRP strengthening, external post-tensioning, and grouting to deliver durable, cost-effective solutions for deteriorated or damaged structures.

Key Features

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Structural Health Monitoring (SHM)

In-depth inspection and diagnostic testing of deteriorated concrete and steel structures using advanced non-destructive testing (NDT) methods to assess real-time structural condition.

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Advanced FRP Strengthening

Specialized application of Fiber-Reinforced Polymer (FRP) systems to restore and enhance structural capacity without invasive reconstruction, validated by doctoral-level research.

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Forensic Engineering Analysis

Root-cause analysis of structural failures, cracks, and settlement issues combining field investigation, material testing, and advanced computational modelling using ABAQUS and SAP2000.

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External Post-Tensioning

Application of external post-tensioning systems to extend the service life of bridges and large-span structures without interrupting operations.

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Heritage & Historic Structure Restoration

Proven track record in the sensitive restoration of world-class heritage buildings, preserving architectural character while delivering modern structural safety standards.

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Nonlinear FEA for Existing Structures

Expert use of ABAQUS for nonlinear finite element analysis to accurately model the behaviour of deteriorated structures and predict the effectiveness of strengthening interventions.

Frequently Asked Questions

IEG has experience restoring and strengthening a wide range of structures including heritage and historic buildings (mosques, governmental buildings, hotels), hospitals, industrial facilities, military installations, and reinforced concrete bridges. Each project receives a bespoke diagnosis and intervention plan.

Fiber-Reinforced Polymer (FRP) composites are bonded to the surface of existing structural elements to increase their load-carrying capacity. The key advantages are minimal disruption to the existing structure, rapid installation, high strength-to-weight ratio, and corrosion resistance. Hazem ElTahan, PhD’s doctoral research specifically validated FRP strengthening techniques for reinforced concrete structures.

Yes. IEG has a proven track record of strengthening historic structures while preserving their architectural character. Techniques such as injection grouting, concealed reinforcement, and FRP on internal faces allow significant structural improvements without visible alteration. Our work on Cairo’s major heritage sites demonstrates this approach.

A forensic engineering investigation typically involves a detailed visual inspection, non-destructive testing (NDT) such as core sampling and ultrasonic pulse velocity testing, review of original structural drawings, and advanced computational modelling. The aim is to identify the root cause of distress or failure and recommend a targeted remediation strategy.