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Aggregate (geology)

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Crystal aggregate (lapis lazuli from Afghanistan)
Construction aggregate (a gravel pit in Germany)
Soil aggregate in Spain

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[edit source | edit]

Use in industry[edit source | edit]

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[edit source | edit]

References[edit source | edit]

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  2. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  3. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  4. 4.0 4.1 Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  5. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  6. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  7. Same Day Aggregates: Types of Aggregates - Same Day Aggregates, accessdate: March 25, 2017
  8. Indiana Mineral Aggregates Association | Carmel, IN: What are aggregates? - Indiana Mineral Aggregates Association | Carmel, IN, accessdate: March 25, 2017
  9. Introduction (1): What are Aggregates? « Herefordshire & Worcestershire Earth Heritage Trust: Introduction (1): What are Aggregates? « Herefordshire & Worcestershire Earth Heritage Trust, accessdate: March 23, 2017
  10. Define Aggregate at Dictionary.com: aggregate, accessdate: March 23, 2017
  11. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).

External links[edit source | edit]