Segregation in concrete
 | This article may be too technical for most readers to understand. (May 2012) |
Segregation in concrete is a case of particle segregation in concrete applications, in which particulate solids tend to segregate by virtue of differences in the size, density, shape and other properties of particles of which they are composed. when the workability of concrete is high under pouring conditions, or the amount of mortar is larger than the void volume of coarse aggregate, or the particle size of aggregate is not ideal, excessive vibration can cause segregation bleeding or lighter weight[1]
Definition
It is described by
The concrete should be free from segregation. It is defined as the breaking up of cohesion (separation of concrete aggregate) in a mass of concrete. It results in honey-combing, decrease in density, and ultimately loss of strength of hardened concrete. The effect of aggregate segregation on the mechanical and transport behavior of concrete has been the focus of both modeling as well as experimental investigation.
See also
Notes
- ^ Mortar is a mixture of fine aggregates and cement, that in concrete acts as a binder between particles of coarse aggregates.[2]: 119, 120
- ^ Compaction describes the process employed to obtain maximum density in concrete after it has been deposited in place. Compaction could be achieved by mechanical vibrators, devices that vibrate at various frequencies and which transfer these vibrations to concrete.[2]: 144
References
- ^ execution, construction (March 2023). "what happens if over vibration of concrete".
- ^ ISBN 978-0-07-460431-1. Retrieved 20 May 2012.
- ^ American Society for Testing Materials. Committee C-9 on Concrete and Concrete Aggregates (1 January 1956). Significance of Tests and Properties of Concrete and Concrete Aggregates: A Résumé of Present Information on the Significance of the Properties of Concrete and Concrete Aggregates and the Tests by which They are Studied and Determined. ASTM International. GGKEY:SL4DFHZUPJ6. Retrieved 20 May 2012.
{{cite book}}: CS1 maint: numeric names: authors list (link) - ISBN 978-0-549-33432-3. Retrieved 20 May 2012.)
{{cite book}}: CS1 maint: multiple names: authors list (link - ISBN 978-0-7277-2823-4. Retrieved 20 May 2012.
Further reading
- American Society of Concrete Contractors (2005). The Contractor's Guide to Quality Concrete Construction. American Concrete Institute. p. 133. ISBN 0870311670
- Towards a realistic morphological model for the meso-scale mechanical and transport behavior of cementitious composites Davood Niknezhad; Balaji Raghavan; Fabrice Bernard; Siham Kamali-Bernard; Composites Part A: Engineering, Volume 381, 72-83, 2015 Elsevier
External links
- Segregation in concrete - from Civil Experiences
- Lecture 12: Module 5 Lecture - 4 Fresh Concrete : Segregation & Bleeding – from the Indian Institute of Technology, Delhi
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