Influence of curing conditions on pumice-based alkali activated composites incorporating Portland cement

Balun, Bilal; Karataş, Mehmet

doi:10.1016/j.jobe.2021.102605

Cited by 19 publications

(8 citation statements)

References 37 publications

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“…This is due to the fact that the secondary gel formed occupied all the pores between the primary gel which leads to the formation of more compacted and dense structure. [17].…”

Section: Sorption Testmentioning

confidence: 99%

INFLUENCE OF QUATERNARY BLENDS OF POZZOLANIC MATERIALS ON CEMENT CONCRETE. A MECHANICAL, DURABILITY & MICRO-STRUCTURAL STUDY

2022

IRJMETS

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Concrete is used worldwide due to easy preparation, high compressive strength and ability to be casted in any desired shape. However, its use is accompanied with the greenhouse gas emission due to cement. This research study aims to partially replace the cement with different percentages (10%, 20%, and 30%) using quaternary blends of pozzolanic materials (Fly Ash + Rice Husk Ash +Pumice) and the mechanical performance (Compressive & Flexural strength) & durability (Sorption) of samples was assessed at 28, 90 and 120 days. To validate the mechanical properties & durability test results, FTIR and SEM analysis were performed on the samples at 120 days. Compressive strength test results showed that the 28 & 90 days compressive strength of control group and partially replaced samples were almost same, however, partially replaced cement samples showed increase in strength after 120 days. The quaternary blends having 20% & 30% of pozzolanic materials gained almost 1.2 & 1.1 times compressive strength as that of reference group at 120 days. The same samples gained flexural strength in the same fashion as that of compressive strength. The sorption test results shows that quaternary blends having 20% & 30% of pozzolanic materials has 65% & 75% less penetration as paralleled to the reference group at 90 & 120 days age respectively. These results were also confirmed by the FTIR & SEM Analysis of the Samples.

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“…This is due to the fact that the secondary gel formed occupied all the pores between the primary gel which leads to the formation of more compacted and dense structure. [17].…”

Section: Sorption Testmentioning

confidence: 99%

INFLUENCE OF QUATERNARY BLENDS OF POZZOLANIC MATERIALS ON CEMENT CONCRETE. A MECHANICAL, DURABILITY & MICRO-STRUCTURAL STUDY

2022

IRJMETS

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“…It is speculated that the CHF in these polyester composites has a vital role in impact load resistance. The presence of fibers in the composite has been shown to limit the creation and propagation of cracks from the matrix as well as transmit stress to the entire composite surface [17,18], enhancing the toughness of the…”

Section: Impact Resiliencementioning

confidence: 99%

Influence of Pumice Particles on the Mechanical and Morphology Properties of Polyester-Cornhusk Fiber Composites

Sari

Suteja

Lokantara

et al. 2022

JFPC

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The purpose of this study was to look into the performance of a cornhusk fiber (CHF) reinforced polyester composite with pumice powder (PP) as a filler. The influence of varied PP volume fractions on composite tensile, bending, impact, and fracture morphology was studied. Using the hot press process, polyester-CHF composites with varied volume fractions of PP filler, namely 5%, 10%, 15%, 20%, 25%, and 30% wt, were created. The results showed that increasing the PP volume fraction from 5% to 15% enhanced the tensile strength of the polyester-CHF composite. The modulus of elasticity and bending modulus tend to grow when filler Pp decreases from 5% to 30%, but elongation value decreases. Furthermore, the best bending strength and impact toughness of the polyester-CHF composite were produced at a volume fraction of PP filler of 20%. SEM images indicate the presence of CHF pull out in all composite variations as well as the number of voids dependent on the PP filler volume.

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“…[47][48][49] Curing temperature and time are other important parameters that affect the resulting GP structure. [50][51] These studies for the sustainable use of locally costeffective pumice in GP production are still limited and need further research given the inferences mentioned above.…”

Section: Introductionmentioning

confidence: 99%

“…As for alkali solution molarity, if its concentration is low, sufficient strength cannot be achieved, and if it is high, the strength decreases again 47–49 . Curing temperature and time are other important parameters that affect the resulting GP structure 50–51 . These studies for the sustainable use of locally cost‐effective pumice in GP production are still limited and need further research given the inferences mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Sustainable activation of pumice with partially variable substitutions of metakaolin and/or fumed silica

Bagci,

Kafkas,

Samuel

et al. 2023

Int J Applied Ceramic Tech

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Sustainable alkali activation of pumice from Turkish origin was studied by a partial replacement of metakaolin and/or fumed silica additives. Following the characterization of as‐received pumice by X‐ray fluorescence spectroscopy, x‐ray diffraction, and nuclear magnetic resonance spectroscopy, a series of powder mixtures were prepared by introducing metakaolin and/or fumed silica (8, 14, and 20 M) into 1 M of the pumice. The mixtures were then dissolved in 11 M NaOH or sodium silicate solutions. The slurries were poured into polyacetal molds to obtain geopolymer samples for mechanical testing and cured in a constant 50°C temperature in a humidity oven for 48 h and then left for 1 week to undergo additional curing at ambient temperature. The microstructural, mechanical, and thermal properties of the final geopolymer samples were determined by XRD, scanning electron microscopy, Weibull analysis of 3‐point flexural and compressive tests and thermal conductivity measurements. Results showed that all the Weibull values were best for 14 M of metakaolin and/or fumed silica. The metakaolin‐added pumice yielded higher compressive strengths of (53.78 ± 33.30 MPa) than fumed silica (10.87 ± 4.04 MPa) and fumed silica plus metakaolin (41.22 ± 5.16 MPa). Thermal conductivities (0.19–0.46 Wm–1K–1) were also comparable to the thermal conductivity of metakaolin‐based geopolymers.

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Influence of curing conditions on pumice-based alkali activated composites incorporating Portland cement

Cited by 19 publications

References 37 publications

INFLUENCE OF QUATERNARY BLENDS OF POZZOLANIC MATERIALS ON CEMENT CONCRETE. A MECHANICAL, DURABILITY & MICRO-STRUCTURAL STUDY

INFLUENCE OF QUATERNARY BLENDS OF POZZOLANIC MATERIALS ON CEMENT CONCRETE. A MECHANICAL, DURABILITY & MICRO-STRUCTURAL STUDY

Influence of Pumice Particles on the Mechanical and Morphology Properties of Polyester-Cornhusk Fiber Composites

Sustainable activation of pumice with partially variable substitutions of metakaolin and/or fumed silica

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