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 ?
Ensuring a sustainable supply of aggregates requires advance planning and balancing a complex matrix of engineering, geographical, and geological variables and community interests.
"The highway industry and the public need to become more educated about the importance of aggregates to local economies and regional transportation infrastructure," says Jorge E.
Tests for mechanical and physical properties of aggregates - Part 6: Determination of particle density and water absorption.
Tests for thermal and weathering properties of aggregates - Part 1: Determination of resistance to freezing and thawing.
Indirectly, it detects the capacity of the aggregates to be used in concrete for the internal deleterious expansion caused by the alkali-silica reaction progress.
The growing demand for leisure activities, such as amusement parks and other luxury sports venues, in the US, Europe, China, and the Middle East is propelling the construction aggregates markets across the country.
Evangelista, "Structural concrete with simultaneous incorporation of fine and coarse recycled concrete aggregates: mechanical, durability and long-term properties," Construction and Building Materials, vol.
Vulcan's transaction with Blue Water, and its acquisition of Aggregates USA, are expected to close in December 2017.
The volume of soil aggregates was determined by placing samples on a rotating imaging stand (Fig.
"Trailing 12-month aggregates shipments have increased for four consecutive quarters and we expect this volume growth to provide positive momentum for broad-based price growth.
The present research study deals with determination of physical and mechanical properties of three different types of aggregates collected from Azad Kashmir.

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