Characterization and potential applications of different powder volcanic ash

Alraddadi, Shoroog; Assaedi, Hasan

doi:10.1016/j.jksus.2020.07.019

Cited by 35 publications

(14 citation statements)

References 41 publications

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“…Table 3 shows the results of the chemical composition by X-ray fluorescence (XRF) obtained from the analysis of a sample of VA, as is the object of this study. The values obtained, mainly those SiO 2 , Al 2 O 3 y CaO, show a similar result to those obtained by Siddique [38,39], Alraddadi and Assaedi [40] and Játiva et al [41] in their studies on natural pozzolans of volcanic and volcano-sedimentary origin. The contents of Fe 2 O 3 y MgO indicate a composition of mostly ferromagnesian, preferably basaltic, while CaO and Na 2 O construe a chalcoalkaline chemism of the samples.…”

Section: Chemical Composition Results By X-ray Fluorescence (Xrf)supporting

confidence: 87%

Volcanic Ash from the Island of La Palma, Spain: An Experimental Study to Establish Their Properties as Pozzolans

et al. 2023

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The eruption of the Cumbre Vieja volcano on 19 September 2021, resulted in the deposition of large quantities of volcanic ash (VA), causing a great impact on the citizens. This work aims to study the properties of this volcanic ash as pozzolanic raw materials to establish their potential use in the development of sustainable cement. Results of chemical and technical characterization are presented. To achieve this goal, Ordinary Portland Cement (OPC) was replaced with standardized percentages of OPC/VA: 10, 25, and 40%. Characterization studies were carried out using chemical analysis of X-ray fluorescence (XRF), chemical quality analysis (QCA), pozzolanicity test (PT) at 8 and 15 days, as well as determining the mechanical strength (MS) at 7, 28, and 90 days. The results obtained by XRF and QCA established that the chemical composition of the VA corresponds to that of the natural pozzolan typical of pyroclastic genesis. The PT test showed that the analyzed samples have a marked pozzolanic nature, both at 8 and 15 days, showing a significant increase in their hydraulic reactivity. Likewise, the MS tests confirmed a continuous increase in mechanical compressive strength, which increased significantly from 7 to 90 days of curing, reaching more than 58 MPa. On the other hand, mechanical tests showed that the three types of dosages used OPC/VA: 10, 25, and 40% were equally effective, with OPC/VA formulations: 10–25% being the most effective. The results obtained in this research could be used by local industries as a guide for the correct use of the volcanic materials of this island, both for the manufacture of construction materials, such as aggregates, and to produce pozzolanic cement with low CO2 emissions, thus having a positive impact on the environment. Finally, the great natural availability of natural VAs in the surrounding areas of La Palma could cover part of the needs for materials used in the construction and restoration of houses and infrastructures damaged during the volcanic eruption.

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Section: Chemical Composition Results By X-ray Fluorescence (Xrf)supporting

confidence: 87%

Volcanic Ash from the Island of La Palma, Spain: An Experimental Study to Establish Their Properties as Pozzolans

et al. 2023

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“…Although our sample showed trace amounts of Al 2 O 3 , other studies have reported higher alumina content in volcanic ashes. [16][17][18][19][20] The CaO was removed on purification, i.e., washing with 2.74 M HCl, resulting in purified volcanic ash (p-TVA) with 99 % SiO 2 , which was subsequently used as a high purity silica source for zeolite synthesis. The surface morphology of the raw and purified volcanic ash is illustrated in the SEM images in Figure 2.…”

Section: Characterization Of Volcanic Ashmentioning

confidence: 99%

“…This may be due to the fact that volcanic ash materials are heterogeneous in composition meaning that the nature of volcanic ash varies according to its source. [16][17][18][19][20][21] The conversion of volcanic ash to zeolites is therefore a challenge due to these variations. Nonetheless, volcanic ash is rich in aluminates and silicates, and its exploitation in the zeolite industry is worth exploring.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of zeolites using silica extracted from tropical volcanic ash

Otieno

Kengara²,

Kowenje

et al. 2023

Mater. Adv.

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“…Alkali activated cement (AAC) which is known as geopolymer cement has been extensively studied in terms of its properties and characteristics. However, few researches have been conducted on natural pozzolan-based alkali activated binders (Alraddadi & Assaedi, 2020). Some studies conducted to activate pozzolanic materials using alkali solutions having substantial amount of silicates and aluminates have indicated promising results on strength development and durability (Zheng et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Alkali Activator Solutions on Strength Improvement of Pozzolan Calcium Hydroxide Binders

Malisa¹,

Chengula²

2022

GEP

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Characterization and potential applications of different powder volcanic ash

Cited by 35 publications

References 41 publications

Volcanic Ash from the Island of La Palma, Spain: An Experimental Study to Establish Their Properties as Pozzolans

Volcanic Ash from the Island of La Palma, Spain: An Experimental Study to Establish Their Properties as Pozzolans

Hydrothermal synthesis of zeolites using silica extracted from tropical volcanic ash

Study on the Influence of Alkali Activator Solutions on Strength Improvement of Pozzolan Calcium Hydroxide Binders

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