aggregate Topic


Definition: granular material, such as sand, gravel, crushed stone, crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a cementing medium to produce either concrete or mortar.- ACI Concrete Terminology

Aggregates are the major constituent (ingredient) in concrete, making up 60% to 70% of the volume of concrete. Aggregates influence the workability of plastic concrete and also the durability, strength, thermal properties, and density of hardened concrete. Particle size divides aggregates into two categories: fine and coarse. Most fine aggregates are sand and contain particles smaller than 3/8 in. (10 mm). Coarse aggregates may be either gravel or crushed materials, with particles larger than about 1/4 in. (6 mm).

ACI Web Pages

Advanced Tips
Type Example Notes
Fuzzy kettle~ Contain terms that are close to the word kettle, such as cattle
Wild cat* Contain terms that begin with cat, such as category and the extact term cat itself
Exact-Single orange Contain the term orange
Exact-Phrase "dnn is awesome" Contain the exact phase dnn is awesome
OR orange bike Contain the term orange or bike, or both. OR, if used, must be in uppercase
orange OR bike
AND orange AND bike Contain both orange and bike. AND must be in uppercase
Combo (agile OR extreme) AND methodology Contain methodology and must also contain agile and/or extreme
Results Per Page:
Limit the search results with the specified tags
Limit the search results modified within the specified time
Limit the search results from the specified source
Search results must exactly contain the keywords