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  Robert Korol, Paul Heerema, Ken Sivakumaran
  Challenge Journal of Structural Mechanics (2016) 2(1) 25-31
  Although the events of that tragic day happened 14 years ago, there remain nagging questions of why the 47 storey WTC 7 steel framed structure collapsed, when it was NOT hit by an airplane.  We will review the official rationale of how the collapse events star...
• Tea waste ash: Characterization, pozzolanic activity and effects on the fresh properties of cement pastes
  İlknur Bekem Kara, Cuma Kara
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  It is a well-known fact that the use of agricultural wastes in cementitious composites by turning them into ash provides both ecological and economic benefits. Tea factories in Türkiye are located in the Eastern Black Sea region. Tea waste generated in factori...
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  Shilpa Vishal Patil
  Challenge Journal of Concrete Research Letters (2025) 16(3) 125-132
  Acoustic emission (AE) technique has been proved as a powerful technique for structural health monitoring. AE technique can also be efficiently used for evaluation of corrosion activity in concrete. Despite its advantages, an effective analysis of data recorde...
• Flowability and compressive strength of ternary blended cement mortar of coal bottom ash and ground cockle shell ash
  Nabilla Mohamad, Rahimah Embong, Nor Hazurina Othman, Khairunisa Muthusamy, Mohd Faizal Md Jaafar
  Challenge Journal of Concrete Research Letters (2025) 16(1) 25-32
  Flourishing cement industry to meet the demand of construction industry has negative impact to the global environment owing to the carbon emission during calcination of cement. At the same time, the disposal of coal bottom ash and cockle shell from coal power ...
• Impact of wrap quantity on strength of damaged and undamaged CFRP-reinforced structural members
  Serdal Ünal, Ahmet Burak Kurt, Mehmet Canbaz
  Challenge Journal of Concrete Research Letters (2025) 16(3) 133-141
  In this study, the effect of carbon fiber reinforced polymer (CFRP) wrapping on the compressive and bending behavior of damaged reinforced concrete structural elements located in high earthquake risk areas was investigated in detail. The main objective was to ...