aggregate


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aggregate

1. (of fruits and flowers) composed of a dense cluster of carpels or florets
2. Geology a rock, such as granite, consisting of a mixture of minerals
3. a group of closely related biotypes produced by apomixis, such as brambles, which are the Rubus fruticosus aggregate

Aggregate

Any of a variety of materials, such as sand and gravel, added to a cement mixture to make concrete.

aggregate

any collection of units or parts, however temporary or fortuitous; thus the contrast may sometimes be drawn between mere aggregates, with no internal structure or basis for persistence, and GROUPS, COMMUNITIES, etc, which will usually possess clear internal structure, coherence, cohesion and relative persistence.

Aggregate

 

in mineralogy and petrography, an accumulation and accretion of fragments of one or several minerals of varying shapes and structures. Aggregates are classified as cemented, friable, earthy, porous, or dense. According to the shape of the grain, they are called grainy, crystalline, needle-shaped, cubic, fibrous, tangled fibrous, radial, uniform crystalline, shell-shaped, accumulative, and so on; and according to composition, simple—consisting of a single mineral (for example, quartzite, which consists of quartz, and marble, which consists of calcite)—and complex, consisting of several minerals (for example, granite is an aggregate of quartz, feldspar, and mica).

V. P. PETROV

aggregate

[′ag·rə·gət]
(botany)
Referring to fruit formed in a cluster, from a single flower, such as raspberry, or from several flowers, such as pineapple.
(chemistry)
A group of atoms or molecules that are held together in any way, for example, a micelle.
(geology)
A collection of soil grains or particles gathered into a mass.
(materials)
The natural sands, gravels, and crushed stone used for mixing with cementing material in making mortars and concretes.

aggregate

1. An inert granular material such as natural sand, manufactured sand, gravel, crushed gravel, crushed stone, vermiculite, perlite, and air-cooled blast-furnace slag, which when bound together into a conglomerate mass by a matrix forms concrete or mortar.
2. An inert granular material that may be added to gypsum plaster.

aggregate

General term for the mineral fragments or particles which, through the agency of a suitable binder, can be combined in a solid mass, e.g., to form a pavement (ICAO).

aggregate

To gather, collect or assemble. For example, "to aggregate data" means to gather separate sets of data. As a noun, "aggregate data" is data that has been collected from two or more sources. See content aggregator.
References in periodicals archive ?
In addition to efforts to reuse existing material and catalog the location of aggregate sites, States are faced with issues that arise at the crossroads of supply, materials transportation, and public policy.
According to the report, a increasing use of recycled aggregates is also likely to bolster demand for construction aggregates.
RUS: Average -13,969; Aggregate -3,352,560; Highest - 53,359.
Figure 4 shows the correlation between the compressive strength and the content of recycled aggregate (R and S) for recycled concrete with two water to cement ratios of 0.47 and 0.53.
Series B 2015-3: EUR43.3m, resulting in an aggregate total of EUR139.7m
where [y.sup.d] is the aggregate demand for goods and services and [y.sup.s] is the aggregate supply of goods and services for the home country, and those variables with the/subscript represent the foreign country.
We now consider the significance of aggregate demand elasticity for the balance of trade when an economic expansion results from an increase of aggregate supply.
Effect of coarse aggregate size and matrix quality on ITZ and failure behavior of concrete under uniaxial compression.
Vulcan's transaction with Blue Water, and its acquisition of Aggregates USA, are expected to close in December 2017.
"Although construction activity and aggregates consumption remain far below historical levels, our aggregates shipments have now increased year-over-year for four consecutive quarters," James continued.