Abstract
This chapter provides an introduction to aggregates, which are the most consumed natural resource after water. The chapter begins with the main definitions of the term, including those from ASTM, EN, and ISO standards. Next heading establishes the main types of aggregates according to the production method: natural, manufactured, or recycled. Natural aggregates can be further subdivided into sand and gravel, and crushed stone. Geological occurrences of natural aggregates (different possibilities since natural aggregates are generated by a great variety of geologic processes) are then discussed as well as the main extraction methods used in sand and gravel and crushed stone exploitation. The principal processing techniques used in aggregate production (crushing, screening, and washing) are described. Then, this chapter describes the properties of aggregates and their associated tests, organized them into five main groups: general, geometrical, mechanical and physical, thermal and weathering, and chemical properties and tests. A heading devoted to aggregate for use as railway ballast is included whereas other important applications of aggregates such as concrete, mortar, and roads are taken into account in the corresponding chapters. The environmental considerations of aggregate quarrying are finally kept in mind because aggregate is extracted close to major centers of demand (e.g., big cities) to minimize cost of transport.
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Standards
ASTM C117 – 17. Standard test method for materials finer than 75-μm (No. 200) sieve in mineral aggregates by washing
ASTM C1180 – 19. Standard terminology of mortar and grout for unit masonry
ASTM C125 – 20. Standard terminology relating to concrete and concrete aggregates
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ASTM C1260 – 14. Standard test method for potential alkali reactivity of aggregates (mortar-bar method)
ASTM C127 – 15. Standard test method for density, relative density (specific gravity), and absorption of coarse aggregate
ASTM C128 – 15. Standard test method for density, relative density (specific gravity), and absorption of fine aggregate
ASTM C131/131M – 14. Test method for resistance to degradation of small size coarse aggregate by abrasion and impact in the los angeles machine
ASTM C136/136M – 19. Test method for sieve analysis of fine and coarse aggregates
ASTM C142/C142M – 17. Standard test method for clay lumps and friable particles in aggregates
ASTM C1777 – 15. Standard test method for rapid determination of the methylene blue value for fine aggregate or mineral filler using a colorimeter
ASTM C289 – 07. Standard test method for potential alkali-silica reactivity of aggregates (chemical method) (withdrawn 2016)
ASTM C29/C29M – 17a. Test method for bulk density (“unit weight”) and voids in aggregate
ASTM C295/295M – 19. Standard guide for petrographic examination of aggregates for concrete
ASTM C535 –16. Test method for resistance to degradation of large size coarse aggregate by abrasion and impact in the Los Angeles machine
ASTM C566 – 19. Standard test method for total evaporable moisture content of aggregate by drying
ASTM C666/C666M – 15. Test method for resistance of concrete to rapid freezing and thawing
ASTM C671 – 94. Standard test method for critical dilation of concrete specimens subjected to freezing (withdrawn 2003)
ASTM C672/C672M – 12. Standard test method for scaling resistance of concrete surfaces exposed to deicing chemicals
ASTM C702/C702M – 18. Standard practice for reducing samples of aggregate to testing size
ASTM C88/C88M – 18. Standard test method for soundness of aggregates by use of sodium sulfate or magnesium sulfate
ASTM D1217 – 15. Standard test method for density and relative density (specific gravity) of liquids by bingham pycnometer
ASTM D2419 – 14. Standard test method for sand equivalent value of soils and fine aggregate
ASTM D2419 – 14. Test method for sand equivalent value of soils and fine aggregate
ASTM D3319 – 11(2019). Standard test method for accelerated polishing of aggregates using the British Wheel
ASTM D3398 – 00(2006). Standard test method for index of aggregate particle shape and texture
ASTM D3744/D3744M – 18. Standard test method for aggregate durability index
ASTM D4791 – 19. Standard test method for flat particles, elongated particles, or flat and elongated particles in coarse aggregate
ASTM D5821 – 13(2017). Standard test method for determining the percentage of fractured particles in coarse aggregate
ASTM D6928 – 17. Standard test method for resistance of coarse aggregate to degradation by abrasion in the Micro-Deval apparatus
ASTM D7428 – 15. Standard test method for resistance of fine aggregate to degradation by abrasion in the Micro-Deval Apparatus
ASTM D75/D75M – 19. Standard practice for sampling aggregates
ASTM D7698 – 19. Standard test method for in-place estimation of density and water content of soil and aggregate by correlation with complex impedance method
ASTM D8 – 19. Standard terminology relating to materials for roads and pavements
EN 1097-1: 2011. Tests for mechanical and physical properties of aggregates—part 1: determination of the resistance to wear (micro-Deval)
EN 1097-10: 2014. Tests for mechanical and physical properties of aggregates—part 10: determination of water suction height
EN 1097-11: 2013. Tests for mechanical and physical properties of aggregates—part 11: determination of compressibility and confined compressive strength of lightweight aggregates
EN 1097-2: 2010. Tests for mechanical and physical properties of aggregates—part 2: methods for the determination of resistance to fragmentation
EN 1097-3: 1998. Tests for mechanical and physical properties of aggregates—part 3: determination of loose bulk density and voids
EN 1097-4: 2008. Tests for mechanical and physical properties of aggregates—part 4: determination of the voids of dry compacted filler
EN 1097-5: 2008. Tests for mechanical and physical properties of aggregates—part 5: determination of the water content by drying in a ventilated oven. EN 1097-6:2013. Tests for mechanical and physical properties of aggregates—part 6: determination of particle density and water absorption
EN 1097-7: 2008. Tests for mechanical and physical properties of aggregates—part 7: determination of the particle density of filler—pycnometer method
EN 1097-8: 2009. Tests for mechanical and physical properties of aggregates—part 8: determination of the polished stone value
EN 1097-9: 2014. Tests for mechanical and physical properties of aggregates—part 9: determination of the resistance to wear by abrasion from studded tyres—Nordic test.
EN 12620: 2013. Aggregates for concrete
EN 13383-1: 2013. Armourstone—part 1: specification
EN 13450: 2013. Aggregates for railway ballast
EN 1367-1: 2007. Tests for thermal and weathering properties of aggregates—part 1: determination of resistance to freezing and thawing
EN 1367-2: 2010. Tests for thermal and weathering properties of aggregates—part 2: magnesium sulfate test
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EN 1367-4: 2008. Tests for thermal and weathering properties of aggregates—part 4: determination of drying shrinkage
EN 1367-5: 2011. Tests for thermal and weathering properties of aggregates—part 5: determination of resistance to thermal shock
EN 1367-6: 2008. Tests for thermal and weathering properties of aggregates—part 6: determination of resistance to freezing and thawing in the presence of salt (NaCl)
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EN 933-1: 2012. Tests for geometrical properties of aggregates—part 1: determination of particle size distribution-sieving method
EN 933-10: 2001. Tests for geometrical properties of aggregates—part 10: assessment of fines—grading of filler aggregates (air jet sieving)
EN 933-11: 2009. Tests for geometrical properties of aggregates—part 11: classification test for the constituents of coarse recycled aggregate
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Further Reading
Antony SJ, Hoyle W, Ding Y (eds) (2004) Granular materials, fundamentals & applications. The Royal Society of Chemistry, Cambridge, 380 p
Gambhir ML, Jamwal N (2014) Building and construction materials – testing and quality control. McGraw Hill Education (India) Private Limited, New Delhi, 566 p
National Stone, Sand and Gravel Association (2013) The Aggregates handbook 2nd edition
Primel L, Tourenq C (eds) (2000) Aggregates: geology, prospection, environment, testing, extraction, specifications, processing plants, equipment, quality. AABalkema, Rotterdam, 590 p
Sahu GC, Jena J (2015) Building materials and construction. McGraw Hill Education India Pvt Ltd, 900 p
Smith MR, Collins PG (2001) Aggregates: sand, gravel and crushed rock aggregates for construction purposes, Geological Society Engineering Geology Special Publication no. 17. The Geological Society, London, 339 p
Varghese PC (2015) Building materials, 2nd edn. PHI Learning Private Limited, New Delhi, 308 p
Useful Links
British Marine Aggregate Producers Association. www.bmapa.org
European Aggregate Association. www.uepg.eu
LafargeHolcim. www.lafargeholcim.com
Martin Marietta. www.martinmarietta.com
Mineral Products Association. www.mineralproducts.org
Tarmac. www.tarmac.com
The National Stone, Sand and Gravel Association. www.nssga.org
Vulcan Materials Company. www.vulcanmaterials.com
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Bustillo Revuelta, M. (2021). Aggregates. In: Construction Materials. Springer Textbooks in Earth Sciences, Geography and Environment. Springer, Cham. https://doi.org/10.1007/978-3-030-65207-4_2
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