Water retention properties of porous geopolymers for use in cooling applications

Okada, Kiyoshi; Ooyama, Asami; Isobe, Toshihiro; Kameshima, Yoshikazu; Nakajima, Akira; MacKenzie, Kenneth J.D.

doi:10.1016/j.jeurceramsoc.2008.11.006

Cited by 118 publications

(59 citation statements)

References 9 publications

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“…The existance of three dimensional ring in geopolymer can be used for water and nutrient storage for plantation aplication. Okada et al, [9] stated that geopolymers are good candidates for water absorbers due to their microstructure.…”

Section: Resultsmentioning

confidence: 99%

Study of Solid-Liquid Ratio of Fly Ash Geopolymer as Water Absorbent Material

2017

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Abstract. Geopolymer has been synthesized from fly ash to be applicated as water absorbent material. This research conducted to determine the ability of geopolymer to abrsop water by variation of solid -liquid ratio at optimum molarity of NaOH; 3 M. In this research, the synthesis of geopolymer was conducted at the variation of solid-liquid ratio; 60:40, 65:35, 70:30, and 75:25. Result of the treatment were characterized by XRD and SEM to compare the geopolymer structure. Water absorption capacity was measured by immersing the geopolymer specimens in water for 24 hours. Based on the result, solid -liquid ratio with maximum water absorbed was 70:30 with 13,04 wt%.

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Section: Resultsmentioning

confidence: 99%

Study of Solid-Liquid Ratio of Fly Ash Geopolymer as Water Absorbent Material

2017

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“…As the particle size become smaller, geopolymer will certainly has higher surface area and more enhanced absorption capacity. Geopolymer with high porosity consists of agglomerated fine particles and less platy shape [1]. Geopolymer with 3M NaOH produces fine particle agglomerate, as seen in Figure 3(a).…”

Section: The Effect Of Naoh Molar Ratio Toward the Morphology Of Geopmentioning

confidence: 99%

“…Porous material of ceramic is a potential material to be used as an absorbent (water absorber) [1]. Water absorber is very useful, especially as a planting medium where the landmass area is limited.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Fly Ash Geopolymer for Water Absorbent Material

2017

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Abstract. Geopolymer as a water absorbent material has been synthesized from fly ash. This research aims to determine the ability of geopolymer to save water content with variations of NaOH molar ratio. In this research, the synthesis of geopolymer was conducted by setting NaOH molar ratio at 3, 4, 5, 6 and 7 M. The resulting material characterization was done by using XRD, FTIR and SEM in order to characterize the geopolymer structures. Water absorption capacity was measured by immersing the geopolymer specimens in water for 24 hours. The results show that the optimum molar ratio of NaOH was 3 M, which water absorption capacity was 11.10%wt.

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“…Compared to ordinary Portland cement, geopolymers provide better properties [1][2][3]. Fly ash is a waste generated by coal combustion which has temperatures differ by technique, typically the following four: fluidizedbed, pulverized coal combustion 1, pulverized coal combustion 2 and coal gasification IGCC; respective operating temperatures are 850º, 1250º, 1500º and 1800º C [4].…”

Section: Introductionmentioning

confidence: 99%

A Study on Factors Affecting Geopolymerization of Low Calcium Fly Ash

Tajunnisa¹

2017

GEOMATE

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This paper presents some factors affecting geopolymerization of low calcium fly ash for geopolymeric matrices. Low calcium fly ash samples were collected from two different coal-powered facilities: an Indonesian fertilizer plant and a Japanese power plant. Several series of tests were conducted using various ratios of fly ash to activator as well as ratios of activators to sodium hydroxide molarity. Each matrix consisted of a set molar ratio of three variations of Si/Al (1.5, 2, 2.5), Na2O/SiO2 (0.3-0.38), H2O/SiO2 (2.8 to 3.5), H2O/Na2O (9 to 10.6), and mass ratio of water/solid (0.31 to 0.45). The setting time of Japanese ash-matrices were longer than Indonesian ash. The compressive strength revealed that the Japanese and Indonesian matrices with activator ratios of 1.5 achieved 47.7 and 57.5 MPa respectively, while activator ratios of 2.5 reached 50.9 and 50.5 MPa. In addition, microstructural characterizations-XRF, XRD, SEM, EPMA-were performed. This study concludes that even ashes categorized as the same class, their mineral composition is different. Furthermore, coal combustion techniques modify ash particles, which in turn causes differences in setting time, while strength is not significantly affected.

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Water retention properties of porous geopolymers for use in cooling applications

Cited by 118 publications

References 9 publications

Study of Solid-Liquid Ratio of Fly Ash Geopolymer as Water Absorbent Material

Study of Solid-Liquid Ratio of Fly Ash Geopolymer as Water Absorbent Material

Synthesis and Characterization of Fly Ash Geopolymer for Water Absorbent Material

A Study on Factors Affecting Geopolymerization of Low Calcium Fly Ash

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