Lightweight Geopolymer Concrete Containing Recycled Plastic Beads

Wongkvanklom, Athika; Posi, Patcharapol; Homwuttiwong, Sahalaph; Sata, Vanchai; Wongsa, Ampol; Tanangteerapong, Duangkanok; Chindaprasirt, Prinya

doi:10.4028/www.scientific.net/kem.801.377

Cited by 18 publications

(20 citation statements)

References 21 publications

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“…Zhu et al studied the thermal properties of recycled aggregate concrete and RBs and also found that the thermal conductivity of recycled aggregate concrete increases with the increase in concrete density. Wongkvanklom et al also found that the thermal conductivity coefficient increased with the increasing density of lightweight geopolymer concrete containing recycled plastic beads. The relationship between the dry density and the thermal conductivity of PRGCs in the study is plotted in Figure .…”

Section: Resultsmentioning

confidence: 92%

Use of recycled aggregates in pressed fly ash geopolymer concrete

Wongsa

Siriwattanakarn

Nuaklong

et al. 2019

Env Prog and Sustain Energy

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In this study, the physical, mechanical, and thermal properties of pressed geopolymer concrete (PRGC) mixed with recycled concrete aggregate (RC) and recycled concrete block aggregate (RB) were investigated. Lignite coal fly ash, sodium hydroxide solution (NaOH), and sodium silicate solution were used as source materials to make geopolymer paste. The effect of fly ash to aggregate ratios and concentrations of NaOH on PRGC properties were tested. Test results were also compared to those of PRGCs mixed with conventional aggregate (limestone dust, SD). The test results showed that PRGCs containing RC and RB exhibited lower dry density, thermal conductivity, and compressive strength than those of PRGCs containing SD. Nevertheless, the compressive strength of PRGCs mixed with recycled aggregates was close to the compressive strength for moderate strength lightweight concrete as per ACI 213. Moreover, the lower thermal conductivity and dry density indicated better insulating properties than that of PRGCs containing SD. The developed PRGCs containing RC and RB in the study can be used for the manufacturing of hollow geopolymer‐based concrete block which are green material with improved insulating properties.

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Section: Resultsmentioning

confidence: 92%

Use of recycled aggregates in pressed fly ash geopolymer concrete

Wongsa

Siriwattanakarn

Nuaklong

et al. 2019

Env Prog and Sustain Energy

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“…Moreover, the TSS of 1. 5-2.6 MPa was reported by 25 in their study on LWGPC which was produced utilizing recycled plastic beads as lightweight aggregate.…”

Section: Tensile Splitting Strengthmentioning

confidence: 82%

Thermal and mechanical performance of lightweight geopolymer concrete with pumice aggregate

Jamal,

Bzeni,

Shi

2023

Structural Concrete

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This study aims to prepare and assess the mechanical characteristics of fly ash (FA)‐based lightweight geopolymer concrete (LWGPC) utilizing pumice as a coarse aggregate. A comprehensive set of 16 LWGPC mixtures were synthesized. The first twelve mixtures produced with varying alkaline to FA ratio and varying proportions of coarse aggregates. The mixture proportion that has given the highest compressive strength (CS), was selected to create four other LWGPC mixes with water‐to‐solid ratios (w/s) ranging from 0.17 to 0.23. Fresh and mechanical properties as well as thermal conductivity (TC) of the LWGPC samples were examined. The experimental findings indicate an inverse relationship between the w/s ratio and mechanical properties of LWGPC samples. Notably, the mechanical properties attain their highest values at the lowest w/s ratio, primarily attributed to reduced porosity and higher concentration of alkali solution in the mixtures with lesser water content. The LWGPC achieved highest CS of 13 MPa, modulus of elasticity (ME) of 8.8 GPa, flexural strength (FS) of 2.2 MPa, and tensile splitting strength (TSS) of 1.64 MPa. The oven dry density (ODD) and TC values ranged from 1746 to 1815 kg/m3 and 0.119 to 0.131 W/m K, respectively. A low‐cost and eco‐friendly novel lightweight concrete composition with low TC was developed.

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“…High-calcium fy ash (FA) from the Mae Moh power plant has been utilized as a precursor for AAB production in Tailand due to its extensive availability and acceptable chemical composition [19]. Te reaction between SiO 2 and CaO in the FA system assisted in the geopolymerization process when cured at room temperature [20][21][22]. Hence, a combination of C-S-H (calcium silicate hydrate) and/or C-A-S-H (calcium aluminosilicate hydrate) and N-A-S-H (sodium aluminosilicate hydrate) gels is the main reaction of the high-calcium AAB system [15,23,24].…”

Section: Introductionmentioning

confidence: 99%

Influence of Recycled Glass on Strength Development of Alkali-Activated High-Calcium Fly Ash Mortar

Damrongwiriyanupap

Wongchairattana

Phoo-ngernkham

et al. 2023

Advances in Materials Science and Engineering

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This article presents the development of green and sustainable mortars using alkali-activated high-calcium fly ash (AAFA) and recycled glass (RG) as part of the fine aggregate. RG was used to replace river sand at dosages of 0%, 25%, 50%, 75%, and 100% by weight. Sodium hydroxide (SH) and sodium silicate (SS) solutions were used as liquid alkaline activators in all mixtures. The AAFA samples were prepared with different liquid-to-binder ratios of 0.6 and 0.7, and the ratio of SS-to-SH was fixed at 2.0. Compressive and flexural strengths were determined at the ages of 7, 28, and 60 days. Test results showed that the compressive and flexural strengths of AAFA mortars declined as RG replacement increased; nevertheless, they increased with curing time. The high Na2O concentration derived from RG and the weak interfacial transition zone of RG are reasons for the decrease in strength development. The optimum percentage replacement of fine aggregates with RG was found at 25%. The 28-day compressive strength of AAFA with 25% RG was 32.5 MPa for L/B ratios of 0.6 and 29.5 MPa for L/B ratios of 0.7, which resulted in a strength index higher than 75% while releasing low CO2.

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Lightweight Geopolymer Concrete Containing Recycled Plastic Beads

Cited by 18 publications

References 21 publications

Use of recycled aggregates in pressed fly ash geopolymer concrete

Use of recycled aggregates in pressed fly ash geopolymer concrete

Thermal and mechanical performance of lightweight geopolymer concrete with pumice aggregate

Influence of Recycled Glass on Strength Development of Alkali-Activated High-Calcium Fly Ash Mortar

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