@JournalArticle {2492,
	title = {Drying shrinkage performance of fly ash geopolymer mortars reinforced with hybrid fibres},
	journal = {ICE: Construction Materials},
	year = {2017},
	month = {2017-08-05 00:00:00},
	publisher = {Institution of Civil Engineers},
	abstract = {
Drying shrinkage performance is a very important property for reinforced concrete composites just because a high shrinkage performance is associated to a high cracking tendency that leads to future durability problems. Geopolymeric mortars show much higher drying shrinkage than Portland cement based composites because use a low amount of structural water and thus have a higher pore content than OPC composites. Therefore, the use of fibres is especially interesting to counteract the drying shrinkage tendency of geopolymer mortars. This paper provides results on restrained and unrestrained\ shrinkage\ performance\ of fly ash based geopolymeric mortars reinforced with short polymer hybrid fibres (SPHF). The results show that SPHF reduces restrained shrinkage cracking tendency. A low content on SPHF as low as 0.08\% was able to reduce the average crack width by four times when compared to non-reinforced mortars. Increasing the content of SPHF from 0.08\% to 0.8\% reduce the time for the appearance of this first crack by 25 hours and reduce the average crack width by two times.
},
	keywords = {Fly ash, Geopolymers, Modulus of elasticity, short polymer hybrid fibres, Shrinkage, Waste reuse},
	issn = {1747650X, 17476518},
	author = {Kheradmand, M. and Abdollahnejad, Z. and Pacheco-Torgal, F.}
}