Utilization of sweet sorghum fiber to reinforce fly ash-based geopolymer

Chen, Rui; Ahmari, Saeed; Zhang, Lianyang

doi:10.1007/s10853-013-7950-0

Cited by 123 publications

(66 citation statements)

References 52 publications

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“…Poor interaction and dispersion of fibres in matrices after a particular concentration underpins flexural strength reduction. Chen et al [37] studied the flexural behaviour of sweet sorghum fibre reinforced fly ash-based geopolymer, and reported an increasing flexural strength up to 2 wt% fibre content at which on further addition of fibre, flexural strength decrease. The team concluded that sweet sorghum fibre at 2 wt% is optimum, permitting greater load to be transferred throughout the composite delaying micro-crack growth and enhancing flexural strength overall.…”

Section: Flexural Strengthmentioning

confidence: 99%

Effect of glass microfibre addition on the mechanical performances of fly ash-based geopolymer composites

Alomayri

2017

Journal of Asian Ceramic Societies

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In the present study, various amounts of glass microfibres were introduced into a geopolymer for reinforcement purposes. The influence of these microfibres on the performance of the geopolymer composites was investigated. Results show that the appropriate addition of glass microfibres can improve the mechanical properties of geopolymer composites. In particular, the flexural strength, flexural modulus and impact strength increase at an optimum fibre content of 2 wt%. Further, adding glass microfibres to a plain geopolymer matrix has a significant effect on the pre-cracking behaviour. It substantially enhances the post-cracking response.

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Section: Flexural Strengthmentioning

confidence: 99%

Effect of glass microfibre addition on the mechanical performances of fly ash-based geopolymer composites

Alomayri

2017

Journal of Asian Ceramic Societies

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“…Such a contradictory in a specific property is not observed in flexural strength of reinforced geopolymers, where Zhang et al [13], Natali et al [14], Li et al [15] and Zhang et al [16] all have reported improvement of flexural strength by fibre-reinforcing. A comprehensive review on short fibrereinforced geopolymers can be found in Shaikh work [17] and other related papers [18][19][20][21][22][23][24][25][26][27] on fibre-reinforced geopolymer paste and concrete.…”

Section: Introductionmentioning

confidence: 99%

Flexural strength of plain and fibre-reinforced boroaluminosilicate geopolymer

Nazari

Maghsoudpour²,

Sanjayan

2015

Construction and Building Materials

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“…Savastano et al [25] presented that the fracture toughness of cement-based materials can be significantly improved by using sisal fiber owning to the considerable incidence of crack bridging and fiber pull-out. The tensile strength and flexural toughness of geopolymer are also improved by using sweet sorghum fibers [26] and cotton fabrics [27]. However, the degradation of natural fibers and the poor interfacial bond between fiber and cement matrix are two factors which affect the mechanical properties and service life of the composites.…”

Section: Introductionmentioning

confidence: 99%

Sisal fiber-reinforced cement composite with Portland cement substitution by a combination of metakaolin and nanoclay

Wei

Meyer

2014

J Mater Sci

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This paper reports the partial replacement of Portland cement (PC) by combination of metakaolin (MK) and nanoclay (NC) in sisal fiber-reinforced cement composites by studying the microstructure, mechanical behavior, and the interfacial properties between fiber and cement matrices. The mechanical properties of cement matrix and natural fiber-reinforced composites are studied using compressive strength development and flexural behavior, respectively. The tensile behavior of the natural fiber was also investigated and analyzed by Weibull distribution model. The characteristics of hydration products were analyzed by scanning electron microscope, X-ray diffraction, and thermogravimetry analysis. Our results show that the combination of MK and NC can improve the hydration of cement more effectively, with better microstructure and enhanced mechanical properties, than mixes without them. The calcium hydroxide (CH) contents of matrixes with 50 wt% combined substitutions, containing 1, 3, and 5 wt% of nanoclay, were 58.12, 60.16, and 64.25 % less than that of PC, respectively. The ettringite phase is also effectively removed due to the substitution of MK and NC, which improve both Al/Ca and Si/Ca ratios of calcium silicate hydrates (C-S-H) due to the high content of SiO 2 and Al 2 O 3 . The interfacial bond between fiber and cement matrix and flexural properties of sisal fiber-reinforced cement composites are also significantly improved. The optimum interface adhesion between sisal fiber and matrix was achieved by replacing cement by 27 % MK and 3 % NC, which increased the bond strength and pull-out energy by 131. 46 and 196.35 %, respectively.

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Utilization of sweet sorghum fiber to reinforce fly ash-based geopolymer

Cited by 123 publications

References 52 publications

Effect of glass microfibre addition on the mechanical performances of fly ash-based geopolymer composites

Effect of glass microfibre addition on the mechanical performances of fly ash-based geopolymer composites

Flexural strength of plain and fibre-reinforced boroaluminosilicate geopolymer

Sisal fiber-reinforced cement composite with Portland cement substitution by a combination of metakaolin and nanoclay

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