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Crushed rock products
Published in W. A. Peck, J.L. Neilson, R.J. Olds, K.D. Seddon, Engineering Geology of Melbourne, 2018
Scoria is a porous, vesicular material of basaltic composition and of low bulk density (some less than 2 t/m3), formed during explosive phases of basaltic volcanic activity. There are several deposits of scoria located at eruption points associated with the Newer Volcanics to the north and west of Melbourne. In many cases these deposits form prominent cones rising above the volcanic plains, but they also occur as low, subdued features. Two operating pits are situated to the north-east of Melton, and one at Beveridge. Approval to quarry volcanic cones is becoming increasingly difficult to obtain because of aesthetic considerations such as visibility and alteration of the landscape.
Magmatism and Magmatic Rocks
Published in Aurèle Parriaux, Geology, 2018
When lava contains lots of gas, the rock texture is called vesicular (scoria, pumice). The variety called liparite (from the island of Lipari in northern Sicily) has abundant vesicles that are not interconnected, which allows them to float. Pozzolans are scoriaceous volcanic ashes rich in silica, aluminum and iron oxide.
Magmatism and Magmatic Rocks
Published in Aurèle Parriaux, Geology, 2018
When lava contains lots of gas, the rock texture is called vesicular (scoria, pumice). The variety called liparite (from the island of Lipari in northern Sicily) has abundant vesicles that are not interconnected, which allows them to float. Pozzolans are scoriaceous volcanic ashes rich in silica, aluminum and iron oxide.
The use of volcanic scoria from ‘Djoungo’ (Cameroon) as cement replacement and fine aggregate by sand substitution in mortar for masonry
Published in European Journal of Environmental and Civil Engineering, 2020
Willy Hermann Juimo Tchamdjou, Toufik Cherradi, Moulay Larbi Abidi, Luiz A. Pereira-de-Oliveira
The manufacturing of mortars which replace natural aggregates for those of VSA obtained from volcanic scoria deposits is a sustainable alternative. An alternative which can only be considered as beneficial as it reduces the exploitation of the existing sea sand quarries, thus conserving natural resources as well as reducing transport costs and minimising the environmental impact. Volcanic scoria (VS) is a natural material of volcanic origin produced by the release of gases during the solidification of lava. The cellular structure of VS is created by the formation of bubbles or air voids when gases contained in the molten lava flowing from volcanoes become trapped on cooling. The cells are elongated and parallel to one another and are sometimes interconnected. VS has been used as aggregate in the production of lightweight mortar or concrete in many countries of the world (Al-Zou’by & Al-Zboon, 2014; Hossain, 2004; Kan & Gul, 2008). So far, the use of VS was dependent on the availability and limited to the countries where it is locally available or easily imported.
Nitrogen removal from groundwater using scoria: Kinetics, equilibria and microstructure
Published in Journal of Environmental Science and Health, Part A, 2021
Scoria is an igneous rock with abundant round bubble-like cavities known as vesicles. The scoria used in the experiments was obtained from northeast China. It is mainly made up of pores, minerals, and volcanic glass. The main minerals present are quartz, alkali feldspar, and plagioclase. It is gray and black in color. Its density was measured using a loose bulk density measuring apparatus (RZ-100, Aoda Corporation, Beijing China) and was found to be 500-600 kg/m3. Total porosity was 74-78%, and open porosity was 60-70%.Rich resources of raw scoria exist. And it can be easily available in northeast China. The purchase price was approximately 50-100 RMB/m3.Thus, it is affordable, easily accessible and economical for use as a commercial product.