Spectroscopic analysis of Ahlat stone (ignimbrite) and pumice formed by volcanic activity

Aygün, Zeynep; Aygun, M.

doi:10.1016/j.saa.2016.05.018

Cited by 14 publications

(8 citation statements)

References 12 publications

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“…A g value of 2.343 due to the Ni 2+ was reported in the previous study [11]. We are awared of from the reports that the g value of 4.396 can be attributed to Fe +3 ion [12]. It was reported that the resonance at g ≈ 4.3 corresponds to high-spin isolated Fe +3 in the glassy matrix [12].…”

Section: Epr Measurementsmentioning

confidence: 75%

“…We are awared of from the reports that the g value of 4.396 can be attributed to Fe +3 ion [12]. It was reported that the resonance at g ≈ 4.3 corresponds to high-spin isolated Fe +3 in the glassy matrix [12]. As we observed from our EPR result (Figure 1b), it was also defined by Reddy et al [13] that the broad resonance signal at g ≈ 2.049 is a characteristic of Cu 2+ ion.…”

Section: Epr Measurementsmentioning

confidence: 99%

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Application of Spectroscopic Methods for Analysis of Ni-Based Alloys (Ni% ≥70)

Aygün¹

2018

Cumhuriyet Science Journal

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In this paper, we investigate the structural and magnetic properties of Ni based alloys which are in the form of NixFeyMoz (x = 0.80; y = 0.15; z = 0.05), NixCryFez (x = 0.70; y = 0.20; z = 0.10), and NixCryAlzCut (x = 0.75; y = 0.20; z = 0.025; t = 0.025) and are prepared by heating the pellet formed samples at high temperature. For this purpose, electron paramagnetic resonance experiment is performed for analysis of paramagnetic centers of these compositions to see the behaviours of alloys in an external magnetic field. g values are calculated from electron paramagnetic resonance spectra recorded at room temperature. Structural features of NixFeyMoz, NixCryFez and NixCryAlzCut alloys are observed by x-ray diffraction technique. Line positions and line intensities are discussed by the help of x-ray diffraction spectra recorded at room temperature. In order to understand the surface morphology of samples, scanning electron microscopy; for the elemental compositions of the alloys energy dispersive spectrosopy experiments are carried out at room temperature.

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Section: Epr Measurementsmentioning

confidence: 75%

Section: Epr Measurementsmentioning

confidence: 99%

Application of Spectroscopic Methods for Analysis of Ni-Based Alloys (Ni% ≥70)

Aygün¹

2018

Cumhuriyet Science Journal

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“…Besides this, it can be used for landscaping in the construction of the garden wall or the steps on the ground for visualization. The most important features of pumice stone are lightness and good insulation [39].…”

Section: Introductionmentioning

confidence: 99%

Lightweight Natural Pumice Composites for Rehabilitation of Historical Buildings and Landscape Works

Özodabaş

Karakurt

2020

Eskişehir Technical University Journal of Science and Technology a - Applied Sciences and Engineering

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Historical buildings are made of traditional materials such as mud bricks, lime mortars, stone, and wood. Mud brick is not a durable material against water and compression effects. This study aims to increase the usage of natural pumice in both mortar and block production to obtain efficient restoration material in this area. The specimens obtained by using pumice, slaked lime, tile dust, gypsum and expanded clay at certain ratios were cured in both steam and laboratory conditions. The characterization of the raw materials and specimens were carried out by using BET, XRD, SEM analyses. Also, the physical and mechanical properties of the mortar and block specimens were determined with laboratory tests. The test results showed that the highest compressive strength values were obtained from steam cured specimens. It was observed that the water absorption values of the specimens which were steam cured slightly better than the naturally cured specimens.

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“…Ahlat stone is easily processed because of its volcanic origin. It is a lightweight and long-lasting stone with good insulation (Boran, 1997;Ozvan et al, 2015;Aygun and Aygun, 2016). The durability of Ahlat stone is very low due to the pores inside (Baykara and Isik, 2016;Akin et al, 2017;Kuluozturk, 2018;Ertugral and Gunay, 2019).…”

Section: Introductionmentioning

confidence: 99%

İgnimbirit Kayaçlarının Mekanik Dayanımının Artırılması

Bakiş

2020

European Journal of Science and Technology

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Ignimbrite is a type of pyroclastic rock that is formed by the volcanic lava. With the explosion of the Nemrut crater in the city of Bitlis, the lava sprawling around it has cooled down. Because of these cooling, pyroclastic rocks, known as Ahlat stones (AS), were formed in the region. The compressive and bending strength of natural Ahlat stone is very low. In this study, the compressive and bending strength of natural Ahlat stone has been increased by the applications of drying oven curing and combined curing. Natural AS samples were cut into sizes of 150×150×150 mm for compressive test and of 100×100×400 mm for bending test. No cure was applied to some of the natural Ahlat stone samples brought from the quarry, which were selected as reference samples. 10 different cure types were applied to other natural Ahlat stones with the same characteristics as Reference Ahlat stone. These 10 different curing types included air curing, standard water curing, 4 drying oven curing types and 4 combined curing types. After curing, all samples were subjected to compressive and bending tests. Average compressive strength of the reference samples was found to be 9.8 MPa, and its bending strength was found to be 1.6 MPa. The highest average compressive strength of Ahlat stone was found to be 19.2 MPa after 3 days of drying oven curing at 200 o C. The highest average bending strength of Ahlat stone was found to be 3.2 MPa after 3 days of drying oven curing at 200 o C. The results of the study showed that the compressive and bending strength of the natural Ahlat stone can be increased to approximately 2 times after 3 days of drying oven curing at 200 o C.

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Spectroscopic analysis of Ahlat stone (ignimbrite) and pumice formed by volcanic activity

Cited by 14 publications

References 12 publications

Application of Spectroscopic Methods for Analysis of Ni-Based Alloys (Ni% ≥70)

Application of Spectroscopic Methods for Analysis of Ni-Based Alloys (Ni% ≥70)

Lightweight Natural Pumice Composites for Rehabilitation of Historical Buildings and Landscape Works

İgnimbirit Kayaçlarının Mekanik Dayanımının Artırılması

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