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Open AccessArticle

Composite Properties of Non-Cement Blended Fiber Composites without Alkali Activator

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Department of Civil Engineering, National Ilan University, No.1, Sec. 1, Shennong Rd., I-Lan 260, Taiwan
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Department of Environmental Engineering, National Ilan University, No.1, Sec. 1, Shennong Rd., I-Lan 260, Taiwan
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Institute of Materials Engineering, Faculty of Materials Engineering and Physics, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland
4
Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech Republic
*
Author to whom correspondence should be addressed.
Materials 2020, 13(6), 1443; https://doi.org/10.3390/ma13061443
Received: 19 February 2020 / Revised: 19 March 2020 / Accepted: 20 March 2020 / Published: 22 March 2020
(This article belongs to the Special Issue Novel Bioderived Composites from Wastes)
The vigorous promotion of reuse and recycling activities in Taiwan has solved a number of problems associated with the treatment of industrial waste. Considerable advances have been made in the conversion of waste materials into usable resources, thereby reducing the space required for waste storage and helping to conserve natural resources. This study examined the use of non-alkali activators to create bonded materials. Our aims were to evaluate the feasibility of using ground-granulated blast-furnace slag (S) and circulating fluidized bed co-fired fly ash (F) as non-cement binding materials and determine the optimal mix proportions (including embedded fibers) with the aim of achieving high dimensional stability and good mechanical properties. Under a fixed water/binder ratio of 0.55, we combined S and F to replace 100% of the cement at S:F ratios of 4:6, 5:5, 6:4. Polypropylene fibers (L/d = 375) were also included in the mix at 0.1%, 0.2% and 0.5% of the volume of all bonded materials. Samples were characterized in terms of flowability, compressive strength, tensile strength, water absorption, shrinkage, x-ray diffraction (XRD) and scanning electron microscope (SEM) analysis. Specimens made with an S:F ratio of 6:4 achieved compressive strength of roughly 30 MPa (at 28 days), which is the 80% the strength of conventional cement-based materials (control specimens). The inclusion of 0.2% fibers in the mix further increased compressive strength to 35 MPa and enhanced composite properties. View Full-Text
Keywords: fiber reinforced; cementless composites; microscopic property; co-fired fly ash; green materials fiber reinforced; cementless composites; microscopic property; co-fired fly ash; green materials
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MDPI and ACS Style

Lin, W.-T.; Lin, K.-L.; Korniejenko, K.; Fiala, L.; Cheng, A.; Chen, J. Composite Properties of Non-Cement Blended Fiber Composites without Alkali Activator. Materials 2020, 13, 1443.

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