Structural performance of concrete elements retrofitted by geopolymer strengthening system: Input in the rehabilitation of historical buildings

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Abstract

Rehabilitation of historic buildings is a priority since their structural elements suffered from various levels of damage that took place during their service life. Recently, geopolymer is gaining acceptance as an emerging material in the construction industry due to its added advantages. It has shown excellent bond strength to concrete substrate, lower creep and shrinkage, greater durability in severe environments and higher temperature and fire resistance. Geopolymer is relatively new in the rehabilitation system of building structures, although it had been used for new construction applications. Therefore, an effort was made to gather information on the use of geopolymer as repair and strengthening material. This paper reviewed the structural performance of geopolymer-strengthened concrete elements and the field applications of geopolymer as strengthening material for historical buildings. Information from the literature revealed that the load capacity of the non-damaged and fully damaged reinforced concrete (RC) beam can be increased by 12% and 100%, respectively, when strengthened using plain geopolymer. It was found that short fiber-reinforced geopolymer (SFRG) strengthening system enhanced the peak load of RC beam by 15% while 370% if using continuous fiber-reinforced geopolymer (CFRG). To date, field applications of geopolymer strengthening system on historical buildings were limited, nevertheless this technique provided good structural performance making it suitable in the rehabilitation process.
Original languageEnglish
Title of host publicationStructural Studies, Repairs and Maintenance of Heritage Architecture XVI
PublisherWIT Press
Publication date2019
Pages369-380
DOIs
Publication statusPublished - 2019
Event16th International Conference on Studies, Repairs and Maintenance of Heritage Architecture - Seville, Spain
Duration: 7 Oct 20199 Oct 2019
Conference number: 16

Conference

Conference16th International Conference on Studies, Repairs and Maintenance of Heritage Architecture
Number16
CountrySpain
CitySeville
Period07/10/201909/10/2019
SeriesW I T Transactions on the Built Environment
Volume191
ISSN1746-4498

Keywords

  • Geopolymer
  • Historical buildings
  • Repair and strengthening
  • Fiber-reinforced geopolymer

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