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Structural Engineering and Mechanics Volume 89, Number 4, February25 2024 , pages 335-347 DOI: https://doi.org/10.12989/sem.2024.89.4.335 |
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Investigating the long-term behavior of creep and drying shrinkage of ambient-cured geopolymer concrete |
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Asad Ullah Qazi, Ali Murtaza Rasool, Iftikhar Ahmad, Muhammad Ali and Fawad S. Niazi
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| Abstract | ||
| This study pioneers the exploration of creep and shrinkage behavior in ambient-cured geopolymer concrete (GPC), a vital yet under-researched area in concrete technology. Focusing on the influence of sodium hydroxide (NaOH) solution concentration, the research utilizes low calcium fly ash (Class-F) and alkaline solutions to prepare two sets of GPC. The results show distinct patterns in compressive strength development and dry shrinkage reduction, with a 14 M NaOH solution demonstrating a 26.5% lower dry shrinkage than the 16 M solution. The creep behavior indicated a high initial strain within the first 7 days, significantly influenced by curing conditions and NaOH concentration. This study contributes to the existing knowledge by providing a deeper understanding of the time-dependent properties of GPC, which is crucial for optimizing its performance in structural applications. | ||
| Key Words | ||
| ambient curing; compressive strength; fly ash; polymerization; sodium hydroxide | ||
| Address | ||
| Asad Ullah Qazi: Civil Engineering Department, University of Engineering and Technology Lahore, Pakistan Ali Murtaza Rasool: Diamer Bahsa Dam Consultant Group (DBCG)-National Engineering Services Pakistan (NESPAK), Lahore, Pakistan Iftikhar Ahmad: Civil Engineering Department, University of Engineering and Technology Lahore, Pakistan Muhammad Ali: Diamer Bahsa Dam Consultant Group (DBCG)-National Engineering Services Pakistan (NESPAK), Lahore, Pakistan Fawad S. Niazi: Department of Civil and Mechanical Engineering, Purdue University, Fort Wayne, USA | ||