Effect of Curing Temperature and Fiber on Metakaolin-based Geopolymer

Ekaputri, Januarti Jaya; Junaedi, Subaer; Wijaya,

doi:10.1016/j.proeng.2017.01.376

Cited by 47 publications

(28 citation statements)

References 13 publications

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“…It was observed that an increase of fibers improved the compressive strength of specimens. Previous studies also reported the similar findings [34,35]. Xu et al [36] found that, as the content of PVA fibers increased, the compressive and flexural strengths were also increased.…”

Section: Compressive Strengthsupporting

confidence: 61%

Effect of PVA/SiO2 NPs Additive on the Structural, Durability, and Fire Resistance Properties of Geopolymers

Malik

Sarkar

et al. 2019

Applied Sciences

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This exertion introduces polyvinyl alcohol fiber/silica nanoparticles (poly vinyl alcohol (PVA)/SiO2 NPs) in the fly ash-based geopolymer at ambient curing temperature. The present study aims at investigating the structural properties (compressive, bond strength, fracture parameters (fracture toughness (KIc), crack mouth opening displacement (CMOD)), cyclic compression), durability (freeze-thaw), and fire resistivity of the newly developed PVA/SiO2 NPs mediated geopolymer. The outcomes suggest that geopolymers incorporated with 5% PVA fibers showed improved structural properties and durability as compared to other specimens. Investigation on the fire resistivity of the geopolymers exposed to different heating temperatures (400 °C, 600 °C, 800 °C), showed that geopolymers with PVA/SiO2 NPs significantly prevented the explosive concrete spalling. Microstructural studies confirmed that PVA fibers in the geopolymeric matrixes were well distributed and developed a fiber-bridging texture with improved performance. Addition of the nano-silica particles accelerated the heat evolution during the hydration process and the geopolymeric reaction (formation of sodium aluminosilicate N-A-S-H gel) at ambient curing environment.

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Section: Compressive Strengthsupporting

confidence: 61%

Effect of PVA/SiO2 NPs Additive on the Structural, Durability, and Fire Resistance Properties of Geopolymers

Malik

Sarkar

et al. 2019

Applied Sciences

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“…The maximum compressive strength was obtained 90 MPa, by 0.8% of the PVA fiber specimens. Accordingly, Ekaputri [12] found that the addition of PVA fiber in meta kaolingeopolymer mixture increased the compressive strength. Opposite with Borges et al [13] that the adding of PVA fiber in geopolymer mixture unaffected significantly on the compressive strength.…”

Section: Proportionsmentioning

confidence: 99%

“…Opposite with Borges et al [13] that the adding of PVA fiber in geopolymer mixture unaffected significantly on the compressive strength. From Ekaputri [12] reported that the addition of PVA fibers as much as 1% on geopolymer paste has a tendency increased the compressive strength. Li et al [14] stated that the optimum of PVA fibers for concrete ECC at 2% when analyzed from the viscosity of the mixture and the distribution of PVA fiber.…”

Section: Proportionsmentioning

confidence: 99%

The Application of PVA Fiber to Improve the Mechanical Properties of Geopolymer Concrete

Manfaluthy

Ekaputri

2017

MATEC Web Conf.

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Abstract. This paper presents an experimental investigation on the improvement of geopolymer concrete properties through the use of polyvinyl alcohol (PVA) fibers mixed in the fresh concrete. For the purpose of obtaining the optimum mechanical properties, the volume fraction of PVA fibers was varied at 0% ; 0.3% ; 0.5% ; ad 0.8%. All mixtures were cast by mixing fly ash, alkali activator, and aggregates. The activator used in this study was a combination of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH). The mechanical properties of geopolymer concrete were obtained from the results of compressive strength, splitting strength, uniaxial tensile strength, elastic modulus, and flexural strength. It is found that the variation of 0.8% PVA fibers resulted in the highest strength for overall test. The utilization of 0.8% PVA fibers also contributed to increasing the direct tensile up to 50%. However, it is noticed that the elastic modulus was more prone to decrease as the fiber content in the mixture increased.

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“…Geopolymer concrete is known as an environmentally friendly and energy efficient material. Ekaputri [4] reveals that geopolymer concrete is the best technology in overcoming the problem of national coal ash waste crisis in Indonesia. Compared to other types of concrete, geopolymer concrete produces the least amount of CO2 emissions, advanced materials with many advantages (fireproof, rustproof and high strength).…”

Section: Introductionmentioning

confidence: 99%

Behavior of Geopolymer Concrete Confined by Circular Hoops

Arifin¹,

Djaeni²,

Utari³

2018

MATEC Web of Conferences

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This paper discusses the behavior of geopolymer concrete subjected to passive confinement under compression loads. The confinement is induced by the use of lateral hoops, assembled from un-deformed reinforcing bars. To compare the effect of confinement, identical specimens were produced using conventional concrete with the similar concrete compressive strength. The cylinder specimens were 100 mm in diameter and 200 mm in height, and the hoops were placed on the outer most fibers of the cylinders, perpendicular to the line of loading, with no concrete cover. The parameters analyzed in this study were the steel bar to concrete volumetric ratio, the hoop spacings and the steel yield stresses. The experimental results show that unconfined geopolymer concrete were very brittle compared to the unconfined Portland cement concrete. The strength enhancement (K value) of the confined geopolymer concrete was higher than K value of Portland cement concrete. Confined geopolymer concrete also has better deformability compared to the confined Portland cement concrete. The average confinement effectiveness of geopolymer concrete also has a higher value than that commonly used in the Indonesian Concrete Standard (SNI), that is 4.1. The results were further assessed to the most recent experimental test results conducted in this area.

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Effect of Curing Temperature and Fiber on Metakaolin-based Geopolymer

Cited by 47 publications

References 13 publications

Effect of PVA/SiO2 NPs Additive on the Structural, Durability, and Fire Resistance Properties of Geopolymers

Effect of PVA/SiO2 NPs Additive on the Structural, Durability, and Fire Resistance Properties of Geopolymers

The Application of PVA Fiber to Improve the Mechanical Properties of Geopolymer Concrete

Behavior of Geopolymer Concrete Confined by Circular Hoops

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