Earth:Aggregate (geology)
In the Earth sciences, aggregate has three possible meanings.
In mineralogy and petrology, an aggregate is a mass of mineral crystals, mineraloid particles or rock particles.[1][2] Examples are dolomite, which is an aggregate of crystals of the mineral dolomite,[3] and rock gypsum, an aggregate of crystals of the mineral gypsum.[4] Lapis lazuli is a type of rock composed of an aggregate of crystals of many minerals including lazurite, pyrite, phlogopite, calcite, potassium feldspar, wollastonite and some sodalite group minerals.[5]
In the construction industry, an aggregate (often referred to as a construction aggregate) is sand, gravel or crushed rock that has been mined or quarried for use as a building material.
In pedology, an aggregate is a mass of soil particles. If the aggregate has formed naturally, it can be called a ped; if formed artificially, it can be called a clod.[6]
Construction aggregate examples
Use in industry
Aggregates are used extensively in the construction industry[9][10] Often in making concrete, a construction aggregate is used,[4] with about 6 billion tons of concrete produced per year.[11]
See also
- Interfacial Transition Zone (ITZ)
- Soil structure
References
- ↑ Neuendorf, K.K.E., ed (2005). Glossary of Geology (5th ed.). Alexandria, Virginia: American Geological Institute. p. 11.
- ↑ Abel, Mara; Lorenzatti, Alexandre; Rama Fiorini, Sandro; Carbonera, Joel (2015). "Ontological analysis of the lithology data in PPDM well core model". PNEC Conferences. Houston. p. 3. https://www.researchgate.net/publication/276293045. Retrieved 27 March 2017.
- ↑ Teichert, Curt (1965). Devonian Rocks and Paleogeography of Arizona (US Geological Survey Professional Paper 464). Washington DC: USGS. pp. 150. https://pubs.usgs.gov/pp/0464/report.pdf.
- ↑ 4.0 4.1 Jessica Elzea Kogel (2006). Industrial Minerals & Rocks: Commodities, Markets, and Uses (7th ed.). SME. p. 522. ISBN 978-0-87335-233-8.
- ↑ T. Calligaro; Y. Coquinot; L. Pichon; B. Moignard (2011). "Advances in elemental imaging of rocks using the AGLAE external microbeam". Nuclear Instruments and Methods in Physics Research B 269 (20): 2364–2372. doi:10.1016/j.nimb.2011.02.074. Bibcode: 2011NIMPB.269.2364C.
- ↑ Allaby, Ailsa; Allaby, Michael (1999). A Dictionary of Earth Sciences (2nd ed.). Oxford: Oxford University Press. ISBN 0-19-280079-5. https://archive.org/details/dictionaryofeart00alla.
- ↑ Same Day Aggregates: Types of Aggregates - Same Day Aggregates, accessdate: March 25, 2017
- ↑ Indiana Mineral Aggregates Association | Carmel, IN: What are aggregates? - Indiana Mineral Aggregates Association | Carmel, IN, accessdate: March 25, 2017
- ↑ Introduction (1): What are Aggregates? « Herefordshire & Worcestershire Earth Heritage Trust: Introduction (1): What are Aggregates? « Herefordshire & Worcestershire Earth Heritage Trust , accessdate: March 23, 2017
- ↑ Define Aggregate at Dictionary.com: aggregate, accessdate: March 23, 2017
- ↑ Qasrawi, Hisham; Marie, Iqbal (2013). "Towards Better Understanding of Concrete Containing Recycled Concrete Aggregate". Advances in Materials Science and Engineering 2013: 1–8. doi:10.1155/2013/636034.
External links
- What are aggregates?
- Concrete Aggregates — Geological Considerations
- What is aggregate? — The Bare Essentials of Concrete — Part 2 YouTube video (duration 4 minutes)
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