The origin and bloating of the obsidian

Safaryan, Artsruni; Sarkisyan, Tamara; Paytyan, Tatevik; Baghdagyulyan, Armine

doi:10.1051/e3sconf/202017512020

Cited by 3 publications

(7 citation statements)

References 2 publications

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“…Loss of expanded obsidian mass after cold resisting property tests varies within 3,4…0,21 percent, such small loss is explained by that, that open pores quantity ranges from 8 to 20 percent. In such a case due to the jammed air in pores and capillars still remains a space where crystals of ice can penetrate during freezing period and exert essentially low pressure on partitions of pores, that is not to destroy them [5][6][7][8].…”

Section: Resultsmentioning

confidence: 99%

“…To obtain stronger light concretes (Fig. 4) it is necessary to increase the quantity of fine grains, but in this case heavier concretes are obtained [5,7,8].…”

Section: Resultsmentioning

confidence: 99%

“…1). To obtain aggregate of 200-350kg/m 3 average density the thermal treatment of grains having size of 5-20mm should be carried out at 1050-1150 0 C during 3-10 minutes [5][6][7][8].…”

Section: Methodsmentioning

confidence: 99%

“…In this case, the separated obsidian turns into a production waste. Expansion of obsidian will make it possible to obtain a superlight large porous material and thereby solve environmental issues -to utilize production wastes [5].…”

Section: Introductionmentioning

confidence: 99%

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Expanded obsidian as composite material for light concretes

Paytyan

Sargsyan²,

Kalantaryan³

2023

E3S Web of Conf.

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Creation of composite building materials is a way of improvement of certain properties compared with such properties of source components as mechanical, physical, heat-insulating, acoustic, and in addition chemical stability, life span etc., or materials prime cost reduction, including at the expense of various waste utilization. In this connection, there is a lively interest in heat-insulating and acoustic insulation materials. In creating such materials the problem lies in an optimal solution concerning the choice of a light aggregate, binder and the simplest manufacturing technique for products of quite various shape and size. The advantage of a porous composite material is in unique combination of heat-insulating and structural properties and puts it on the same level with durable building materials designed for the same application. Many man-made formations, in particular solid waste, are valuable technological raw materials and can be involved in technological redistribution in order to obtain new composite building materials. In the production of crushed stone, sands from lithoid pumice and perlite, it is advisable to make the separation and separate obsidian. In this case, the separated obsidian turns into a production waste. Expansion of obsidian will make it possible to obtain a superlight large porous material and thereby solve environmental issues - to utilize production wastes. Concretes, produced using expanded obsidian, are of strength class B 12,5 and average density 1150-1200kg/m3 can be called structural and superlight concretes based on expanded obsidians. Heat conductivity factor of such concretes of 400-1200 kg/m3 average density varies from 0.125 to 0.35W/m0K.

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Section: Resultsmentioning

confidence: 99%

“…To obtain stronger light concretes (Fig. 4) it is necessary to increase the quantity of fine grains, but in this case heavier concretes are obtained [5,7,8].…”

Section: Resultsmentioning

confidence: 99%

“…1). To obtain aggregate of 200-350kg/m 3 average density the thermal treatment of grains having size of 5-20mm should be carried out at 1050-1150 0 C during 3-10 minutes [5][6][7][8].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Expanded obsidian as composite material for light concretes

Paytyan

Sargsyan²,

Kalantaryan³

2023

E3S Web of Conf.

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“…Obsidians can have different colours due to their compositions. Black to brown colours of obsidians are caused by iron and other transition elements of ingredients [9]. Due to the great interest in such structures, obsidians were studied widely before [7,[10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

An Analysis on Radiation Protection Abilities of Different Colored Obsidians

Aygün

Aygun

2023

International Journal of Computational and Experimental Science and Engineering

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Obsidians are naturally occurring structures which have great interest and are widely used in engineering, nuclear and medical applications. These glassy volcanic rocks are formed as a result of volcanic activity and lava eruptions. In the present study, it is aimed to determine the radiation protection parameters of obsidians with different colors in order to examine the radiation shielding capabilities of the samples. The parameters were determined in the range of 4keV-100 GeV photon energies by using Phy-X/PSD code. In order to make a meaningful analyze for the radiation shielding potentials of the obsidians, the calculated mass attenuation and linear attenuation coefficients were compared with ordinary concrete which can be widely used as shielding material in the nuclear application.

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Acoustic Materials Based on Expanded Obsidian

Safaryan

Melyan

2019

KEM

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Increasing attention is paid to noise control and provision of the required acoustic comfort. This is due to an increase in the noise of the environment, the concentration of people in the cities, development of industry, transport and aviation. Currently, mass construction does not have the necessary number of sound-proof products and this demand is constantly increasing. Therefore, the development of new efficient sound-proof products, especially on the base of industrial waste, is of particular importance. While separating obsidian during the production of rubble and sand from lithoid pumice and perlite - it turns into a waste product. With the expansion of obsidian with grain sizes from 5 to 20 mm in a duration of 3-10 minutes at temperatures from 1050 to 11500С, it is possible to obtain a lightweight porous material with the lowest average density of 200–350 kg/m3 (in a piece of stone) and thereby solve environmental issues - to recycle production wastes. The requirements for mechanical strength and decorativeness of sound-absorbing materials are increased, since they are used for tiling internal walls, so they must have low water absorption capacity, low hygroscopicity, and be fire and bio resistant. On the base of expanded obsidian, it is possible to obtain acoustic materials: cellular concrete and plasters with cement and gypsum with an average bending strength of 2.229 and 5.679, and 6.2095 and 12.670 MPa for compression.

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The origin and bloating of the obsidian

Cited by 3 publications

References 2 publications

Expanded obsidian as composite material for light concretes

Expanded obsidian as composite material for light concretes

An Analysis on Radiation Protection Abilities of Different Colored Obsidians

Acoustic Materials Based on Expanded Obsidian

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