Geopolymer matrix for fibre reinforced composites aimed at strengthening masonry structures

Tamburini, S.; Natali, Marco; Garbin, Enrico; Panizza, Matteo; Favaro, Monica; Valluzzi, María Rosa

doi:10.1016/j.conbuildmat.2017.03.017

Cited by 61 publications

(37 citation statements)

References 38 publications

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“…To date, few research is reported which evaluated the behavior of textile reinforced geopolymer. Menna et al [26] use the bi-axial carbon fabric and uniaxial steel fabric reinforced geopolymer composite for flexural strengthening of RC beams. In another study, Tamburini et al [27] studied the use of geopolymer grout to bond basalt, glass, carbon, and steel fabric with masonry.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Hybrid PVA Fiber and AR-Glass Textile Reinforced Geopolymer Composites

Shaikh

Patel

2018

Fibers

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Textile reinforced mortar or concrete, a thin cementitious composite reinforced by non-corrosive polymer textile fabric, was developed and has been researched for its role on repair and strengthening of reinforced concrete (RC) structures. Due to embedment of polymeric textile fabric inside the cementitious matrix, many researchers argued the superiority of this technology than the externally bonded fiber reinforced polymer (FRP) sheet in RC in terms of prevention of debonding of FRP and durability in fire. However, due to use of cement rich matrix the existing development of textile reinforced concrete (TRC) need to be more environmental friendly by replacing cement based binder with geopolymeric binder. This paper presents a first study on the flexural behavior of alkali resistant glass fiber textile reinforced geopolymer (TRG). In this study, two types of geopolymer binder is considered. One is fly ash based heat cured geopolymer and the other is fly ash/slag blended ambient air cured geopolymer binder. Both geopolymer types are considered in the TRG and the results are benchmarked with the current cement based TRC. The effect of short polyvinyl alcohol (PVA) fiber as hybrid reinforced with alkali-resistant (AR) glass fiber textile on the flexural behavior of above TRC and TRGs is also studied. Results show deflection hardening behavior of both TRGs with higher flexural strength in heat cured TRG and higher deflection capacity at peak load in ambient air cured TRG. The increase in PVA fiber volume fraction from 1% to 1.5% did not show any improvement in flexural strength of both TRGs although TRC showed good improvement. In the case of deflection at peak load, an opposite phenomenon is observed where the deflection at peak load in both TRGs is increased due to increase in PVA fiber volume fractions.

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Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Hybrid PVA Fiber and AR-Glass Textile Reinforced Geopolymer Composites

Shaikh

Patel

2018

Fibers

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“…The bonding strength of ozone‐treated specimen increases 143%. This is because the ozone treatment can introduce various oxygen functional groups, such as –COOH, –OH, and –C=O on carbon fiber surface, thereby increasing the wettability of fiber surface . By improving the wettability, the physical affinity between carbon fiber and geopolymer can also be improved .…”

Section: Resultsmentioning

confidence: 99%

“…Both experimental and finite element results show that the epoxy temperature should not exceed 70 °C in order to maintain the integrity between the CFRP and concrete . Since geopolymers possess high strength and very good fire resistance, it can be an alternative to replace epoxy resin as a binding agent for CFRP . Our recent work had been studied geopolymer paste as repair material for concrete structure and prove geoplymer is a good bonding materials …”

Section: Introductionmentioning

confidence: 90%

“…This is because the ozone treatment FIGURE 5 Fire resistance test results of geopolymer can introduce various oxygen functional groups, such as -COOH, -OH, and -C=O on carbon fiber surface, thereby increasing the wettability of fiber surface. 13 By improving the wettability, the physical affinity between carbon fiber and geopolymer can also be improved. 30 The UV treatment of carbon fiber can also result in 134% shear strength improvement due to improving wettability and roughness of carbon fiber surface.…”

Section: Effect Of Carbon Fiber Surface Treatment On Ilssmentioning

confidence: 99%

“…12 Since geopolymers possess high strength and very good fire resistance, it can be an alternative to replace epoxy resin as a binding agent for CFRP. 13,14 Our recent work had been studied geopolymer paste as repair material for concrete structure and prove geoplymer is a good bonding materials. 15 In this study, FA/MK geopolymers pastes were prepared as an adhesive for CFRP concrete retrofitting purpose.…”

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confidence: 99%

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Synthesis of fly ash/metakaolin geopolymer for concrete retrofitting application

Ding

Chang

Lee

et al. 2018

Structural Concrete

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The purpose of this research is to use fly ash as raw material to synthesize geopolymer paste that can replace traditional epoxy resin for concrete reinforcement purpose. Fly ash and metakaolin are mixed with alkali solution at predetermined SiO2/Na2O modulus to form geopolymer pastes, which were then used as a binding agent between carbon fiber reinforced polymer (CFRP) and the concrete substrate. According to the test results, the geopolymer paste synthesized with 0.75 SiO2/Na2O modulus alkali activator have the highest mechanical strength and fire resistance. Under ambient condition, the compressive strength of the concrete cylinder bonded to one layer and two layers CFRP using geopolymers binder is 1.5 times and 2 times of original concrete cylinder, respectively. Under 85% compressive strength loading and elevated temperature, the CFRP (geopolymer) bonded concrete cylinder failed at 516 °C. These test results proved that geopolymer can be a potential binding material for concrete rehabilitation due to its high‐mechanical strength and excellent fire resistance.

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Setting behavior and mechanical properties of geopolymers from fly ash and real construction waste

Kugler,

Krcmar,

Teipel

2023

Int J Ceramic Engine & Sci

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Sustainability is becoming an increasingly important factor in the development of new building materials. In terms of the sustainability of concrete components, the biggest challenge is the high energy consumption and associated greenhouse gas emissions in the production of Portland cement. A common strategy used by the construction industry to improve sustainability is to use residuals to develop lower‐emission geopolymer concretes that eliminate high‐emission cement‐based concretes. Because construction and demolition waste, at 3 trillion tons per year worldwide, also represents an environmental risk, this work will investigate the suitability of geopolymers based on real construction waste. In the course of the investigations, the manufactured geopolymer samples are examined for the material parameters relevant to building materials, namely compressive strength, flexural strength, raw density, total porosity, and thermal conductivity. The setting behavior and the forming structures are investigated by infrared spectroscopy, X‐ray diffraction analysis and scanning electron microscopy. The present study is intended to contribute to the development of a suitable recycling strategy for the material recycling of construction waste in novel geopolymer material.

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Geopolymer matrix for fibre reinforced composites aimed at strengthening masonry structures

Cited by 61 publications

References 38 publications

Flexural Behavior of Hybrid PVA Fiber and AR-Glass Textile Reinforced Geopolymer Composites

Flexural Behavior of Hybrid PVA Fiber and AR-Glass Textile Reinforced Geopolymer Composites

Synthesis of fly ash/metakaolin geopolymer for concrete retrofitting application

Setting behavior and mechanical properties of geopolymers from fly ash and real construction waste

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