Sustainable Use of Traditional Geomaterials in Construction Practice

Geomaterials derived from the Earth’s crust and used in construction after appropriate processing are among the earliest raw materials exploited, processed and used by humans. Their numerous functional properties include accessibility, workability and serviceability, and these are explored within this volume. In modern society, sustainable use of raw materials, specifically those exploited in large volumes such as geomaterials for construction, raises questions of reducing extraction of primary resources and thus minimizing impacts on natural systems, and also employment of materials and technologies to lower emissions of deleterious substances into the atmosphere. This will be possible only if we fully understand the properties, processing and mode of use of traditional geomaterials. Although most of the papers within this volume were written by geologists, the contributions will also be of interest to those working in cultural heritage, monument conservation, civil engineering and architecture.
Petrographic characteristics of intrusive rocks as an evaluation tool of their technical properties
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Published:January 01, 2016
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CiteCitation
Eva Johansson, Karel Miškovský, Magnus Bergknut, Šárka Šachlová, 2016. "Petrographic characteristics of intrusive rocks as an evaluation tool of their technical properties", Sustainable Use of Traditional Geomaterials in Construction Practice, R. Přikryl, Á. Török, M. Gomez-Heras, K. Miskovsky, M. Theodoridou
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Abstract
The main petrographic variables of intrusive rocks that influence the technical test methods common used within the aggregate industry were identified and evaluated, the aim being to investigate whether petrographic description could be used as a tool for the preliminary quality evaluation of different rock groups. Evaluation of the dependence of the technical test methods on petrographic variables covered 26 intrusive rocks, including some of their altered varieties (orthogneisses), divided into two groups: 17 granitoids and 9 gabbroids. The selective designated samples were analysed to determine their petrographic characteristics and resistance to fragmentation, wear and wear by abrasion from studded tyres. In order to identify the complicated associations between the petrographic and technical properties, multivariate statistical evaluation was performed. The results of statistical evaluation highlighted that mean grain size of mica minerals, grain size distribution, content of mica minerals and mean grain size were the main variables influencing the technical properties of granitoid rocks, while for gabbroid rocks, the main influences were the frequency of microcracks, mica content, grain size distribution and mean grain size.
- aggregate
- cataclasis
- construction materials
- cracks
- durability
- engineering properties
- foliation
- fragmentation
- gabbroic composition
- grain size
- granitic composition
- igneous rocks
- mechanical properties
- metamorphic rocks
- methods
- microcracks
- microscope methods
- microstructure
- mineral composition
- multivariate analysis
- petrography
- plutonic rocks
- rock mechanics
- size distribution
- statistical analysis
- testing