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TitleDrying shrinkage of fly ash geopolymeric mortars reinforced with polymer hybrid fibres
Author(s)Kheradmand, Mohammad
Abdollahnejad, Zahra
Pacheco-Torgal, F.
KeywordsFly ash
Modulus of elasticity
Short polymer hybrid fibres
Waste reuse
Materials technology/sustainability/waste management & disposal
Issue date2017
PublisherICE Publishing
JournalConstruction Materials: Proceedings of the Institution of Civil Engineers
CitationKheradmand M., Abdollahnejad Z., Pacheco-Torgal F. Drying shrinkage performance of fly ash geopolymer mortars reinforced with hybrid fibres, ICE: Construction Materials, pp. 1-13, 1747650X, 17476518, 2017
Abstract(s)Drying shrinkage performance is a very important factor for reinforced concrete composites because a high shrinkage performance is associated with a high cracking tendency, which leads to future durability problems. Geopolymeric mortars show much higher drying shrinkage than Portland cement-based composites because they use a low amount of structural water and thus have a higher pore content than ordinary Portland cement composites. Therefore, the use of fibres is especially interesting to counteract the drying shrinkage tendency of geopolymeric mortars. This paper provides results on the restrained and unrestrained shrinkage performance of fly ash-based geopolymeric mortars reinforced with short polymer hybrid fibres (SPHF). The results show that SPHF reduces the shrinkage cracking tendency. A content of SPHF as low as 0·08% was able to reduce the average crack width by four times when compared with non-reinforced mortars. Increasing the content of SPHF from 0·08 to 0·8% reduces the time of appearance of the first crack by 25 h and reduces the average crack width by two times.
Description"Published Online: November 23, 2017"
AccessEmbargoed access (2 Years)
Appears in Collections:C-TAC - Artigos em Revistas Internacionais

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