Fly Ash and Recycled Coarse Aggregate in Concrete: New Era for Construction Industries - A Literature Review
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2013 by IJETT Journal|
|Year of Publication : 2013|
|Authors : Prof.Chetna M.Vyas , Prof.Jayeshkumar Pitroda|
Prof.Chetna M.Vyas , Prof.Jayeshkumar Pitroda. "Fly Ash and Recycled Coarse Aggregate in Concrete: New Era for Construction Industries - A Literature Review". International Journal of Engineering Trends and Technology (IJETT). V4(5):1781-1787 May 2013. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group.
Use of recycled coarse aggregate in concrete can be useful for environmental protection and economical terms. Recycled aggregates are the materials for the future. Same as fly ash is also a by - product from various industries. Fly ash is a group of materials that can vary significantly in composition. It is residue left from burning coal, which is collected on an electrostatic precipitator or in a bag house. It mixes with flue gases that result when powdered coal is used to prod uce electric power. The advantages of using fly ash far outweigh the disadvantages. The most important benefit is reduced permeability to water and aggressive chemicals. Properly cured concrete made with fly ash creates a denser product because the sizes o f the pores are reduced. This increases strength and reduces permeability. Globally, the concrete industry consumes large quantities of natural resources, which are becoming insufficient to meet the increasing demands. At the same time, large number of old buildings and other structures have reached the end of their service life and are being demolished, resulting in generation of demolished concrete. Some of this concrete waste is used as backfill material, and much being sent to landfills. Recycling concr ete by using it as replacement to new aggregate in concrete could reduce concrete waste and conserve natural sources of aggregate. In the last two decades, varieties of recycling methods for construction and demolition wastes have been explored and are in well - developed stage. Fly ash is known to be a good pozzolanic material and has been used to increase the ultimate compressive strength and workability of fresh concrete .
 Cho, Y. H., and Yeo, S. H. (2004). "Appli cation of recycled waste aggregate to lean concrete subbase in highway pavement." Can. J. Civ. Eng.,31(6), 1101 – 1108.
 Dhir, R. K., Limbachiya, M. C., and Leelawat, T. (1999). "Suitability of recycled concrete aggregate for use in BS 5328 designated mixes." Proc. Inst. Civ. Eng., Struct. Build., 134(4), 257 – 274.
 Dhir, R. K., Munday, J. G. L., and Ong, L. T. (1986). "Investigations of the engineering properties of OPC/pulverized - fuel ash concrete: De - formation properties." Struc t. Eng., 64B (2), 36 – 42.
 Otsuki, N., Miyazat, S., and Yodsudjai,W. (2003). "Influence of recycled aggregate on interfacial transition zone, strength, chloride penetration, and carbonation of concrete." J. Mater. Civ. Eng., 15(5), 443 – 451.
 Ravindrajah R S, Loo Y H and Tam C T. (2005) Strength evaluation of recycled aggregate concrete by in - situ tests. Mat Stru; 21(4):289 – 95.
 Olorunsogo, F. T., and Padayachee, N. (2002). "Performance of recycled aggregate concrete monitored by durability indexes." Cem. Concr. Res.,32(2), 179 – 185.
 Abou - Zeid, M. N., Shenouda, M. N., McCabe, S., and El - Tawil F. A. (2005). "Reincarnation of concrete." Conc. Int.,27 (2), 53 – 59.
 Salem, R. M., Burdette, E. G., and Jack - son, N. M. (2003). "Resistance to freezing and thawing of recycl ed aggregate con - crete." ACI Mater. J., 100 (3), 216 – 221.
 Tavakoli, M., and Soroushian, P. (1996). "Drying shrinkage behavior of recycled aggregate concrete." Conc. Int., 18 (11), 58 – 61.
 Gomez - Soberon, J. M. V. (2003). "Relation - ship between gas absorpti on and the shrinkage and creep of recycled aggregate concrete." Cem Conc Res,25(2), 42 – 48.
 Mehta, P. K. (1985). "Influence of fly ash characteristics on the strength of Portland - fly ash mixture." Cem. Concr. Res.,15 (4), 669 – 674.
 Naik, T. R., and Ramme, B. W. (1989). "High - strength concrete containing large quantities of fly ash." ACI Mater. J.,86 (2), 111 – 116.
 IS 3812 (Part 1): 2003 Pulverized fuel ash – Specification (Part 1) For use as pozzolana in cement, cement mortar and concrete.
 IS: 12269 – 1987 Spe cifications for 53 – grade ordinary Portland cement.
 D. N. Parekh, Dr. C. D. Modhera “Effect of Fly Ash on Recycled Aggregate Concrete” NBM&CW
 http://www.nbmcw.com/magazines/construction - magazine.html
Fly ash, Recycled Coarse Aggregate, Concrete.