The effects of synthetic wollastonite microfibers on PVA fiber-reinforced engineered geopolymer composites

H.Ö. Öz; M. Güneş

doi:10.3989/mc.2024.363423

Authors

H.Ö. Öz Department of Civil Engineering, Niğde Ömer Halisdemir University https://orcid.org/0000-0003-3568-1689
M. Güneş Department of Civil Engineering, Nevşehir Hacı Bektaş Veli University https://orcid.org/0000-0001-6788-788X

DOI:

https://doi.org/10.3989/mc.2024.363423

Keywords:

EGC, Synthetic wollastonite microfiber, Mechanical, durability and dimensional stability properties, Freeze-thaw resistance, TGA/DTA

Abstract

In this study, first, synthetic wollastonite microfiber (SWM) with a high aspect ratio (44:1) was produced with a special three-stage production method. Then, fly ash and ground granulated blast furnace slag-based engineered geopolymer composites (FA+GGBFS-based EGCs) were developed. SWM was used in different proportions instead of FA. The compressive strength of EGCs, changed in the range of 88.1-111.1 and 95.1-122.6 MPa at 7 and 28 days, respectively. Additionally, EGCs containing 6% SWM performed the best, considering both ‘‘increasing deformation capacity’’ and ‘‘maintaining the bearing strength by fiber bridging after crack’’, since they acted like a fiber owing to the acicular particle structure of SWM. Moreover, it can be said that the presence of the SWM mineral in the pore system, ensured pore discontinuities in the matrix because of its acicular particle structure. Consequently, the mechanical, durability and dimensional stability properties of EGCs improved with SWM.

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