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Article
Publication date: 10 July 2020

G.I. Yakovlev, A. Gordina, Rostislav Drochytka, A.F. Buryanov and Olga Smirnova

The purpose of the study is regarding the development of eco-oriented technologies for obtaining the building gypsum materials with the involvement of industrial by-products or…

146

Abstract

Purpose

The purpose of the study is regarding the development of eco-oriented technologies for obtaining the building gypsum materials with the involvement of industrial by-products or waste.

Design/methodology/approach

The scanning electron microscopy, X-ray microanalysis and IR spectral analysis were used to study the structure of gypsum matrix. The method of comparison of modified and unmodified gypsum matrix was used. Physical modeling of gypsum matrix crystallization is used to study changes in the morphology of hydration products.

Findings

The experimental results show that the addition of technical soot into a gypsum binder leads to a change in the morphology of crystalline hydrates of calcium sulfate dihydrate. Results of the scanning electron microscopy, X-ray microanalysis and IR spectral analysis confirm the change of physical and mechanical characteristics of the gypsum binder due to the structural modification of the gypsum matrix with ultrafine carbon soot. The achieved degree of the structural modification of the gypsum matrix is compatible with the results obtained when the gypsum binder was modified with dispersions of carbon nanotubes.

Originality/value

The morphology of the crystalline hydrates of the gypsum matrix with the addition of 0.04%, 0.06% and 1% of the carbon soot is characterized by the transition of the classical needle-like structure of gypsum dihydrate to the lamellar structure of increased density. One can observe the formation of intergrowths around ultrafine carbon soot particles. The studied carbon additive can improve strength characteristics of the gypsum matrix.

Details

Smart and Sustainable Built Environment, vol. 10 no. 4
Type: Research Article
ISSN: 2046-6099

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Publication date: 1 March 1993

Zbigniew Karpowicz

A significant sector of the international tourism industry focusses on the natural and cultural attributes of target destinations and sites. The more natural and unusual the…

869

Abstract

A significant sector of the international tourism industry focusses on the natural and cultural attributes of target destinations and sites. The more natural and unusual the attraction the greater the value to the industry and hence the greater the promotion of the venue. However, this pattern of exploitation could prove to be a short cut to actually degrading the object of attraction and hence its pulling power.

Details

The Tourist Review, vol. 48 no. 3
Type: Research Article
ISSN: 0251-3102

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Article
Publication date: 1 January 2003

Karagiannis Stephanos

Crete, an exquisite island, is located between Europe, Asia and Africa, and in the north, is it surrounded by the Cretan Sea and in the south, by the Libyan Sea. It has become…

180

Abstract

Crete, an exquisite island, is located between Europe, Asia and Africa, and in the north, is it surrounded by the Cretan Sea and in the south, by the Libyan Sea. It has become known as one of the most alluring tourist destinations in Europe. This is attributed to its geographical location, extraordinary flora and fauna, a unique natural phenomenon, such as the Gorge of Samaria, and its rich historical monuments. The archaeological sites in Crete (Knossos palace) are worldwide known and can be visited along with the famous Byzantine monuments. As it is understood, such churches and their artifacts mainly appeal to visitors with particular religious interests. At the same time, for the modern tourist who is interested beyond the usual attractions, there are also developed traditional settlements, the Sustainable tourism and Ecotourism, traditional cultural events and feasts, as well as exhibitions of popular art. Regarding the economy, over the last decade, an important growth in agriculture (the climate encourages a lot of bio‐cultures), industry and finally tourism has taken place. However, a more general growth is also to be seen in other economic sectors (manufacture, trade etc.) that benefit from the increase in the number of consumers annually, due to the surge in tourism. This radiograph of the island of Crete demonstrates all the natural and cultural elements that are impressive and rare within one area, and which, if exploited correctly, may create other tourist models based on natural and cultural resources.

Details

Tourism Review, vol. 58 no. 1
Type: Research Article
ISSN: 1660-5373

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