The Effect of Different Types of Recycled Coarse Aggregates on the Properties of Concrete
 |
International Journal of Engineering Trends and Technology (IJETT) | 
|
| © 2017 by IJETT Journal | ||
| Volume-46 Number-3 |
||
| Year of Publication : 2017 | ||
| Authors : Gehad M. Mostasfa, Dr. Ahmed Abd El-azim A., Prof. Dr. Hany A. El-Ghazaly |
||
| DOI : 10.14445/22315381/IJETT-V46P221 |
Citation
Gehad M. Mostasfa, Dr. Ahmed Abd El-azim A., Prof. Dr. Hany A. El-Ghazaly "The Effect of Different Types of Recycled Coarse Aggregates on the Properties of Concrete", International Journal of Engineering Trends and Technology (IJETT), V46(3),133-138 April 2017. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
Abstract
The main purpose of this study is to investigate the effect of different types of recycled coarse aggregates on the properties of fresh and hardened concrete. The neutral aggregates and the five types of recycled coarse aggregates were used to produce twenty-one design mixes. The mixes are divided to three groups. Group (1) is obtained by replacing gravel coarse aggregate by recycled coarse aggregates (crushed concrete, crushed marble, crushed mosaic, crushed ceramic, and crushed bricks) at cement content = 300 kg/m³, W/C= 0.52 Group (2) is obtained by replacing natural coarse aggregate with the same recycled coarse aggregates at cement content = 350 kg/m³, W/C= 0.50. Group (3) is obtained by replacing natural coarse aggregate with the same recycled coarse aggregates at cement content = 400 kg/m³, W/C= 0.48. The experimental part of this study was carried out to cover the various properties of fresh and hardened recycled aggregates concrete. Twenty-one design mixes were needed for the parametric study. The effects of replacing gravel coarse aggregate on the fresh and hardened properties of concrete such as slump, density, compressive strength, splitting tensile strength, and flexural strength were investigated. Finally, the results showed that crushed recycled marble and crushed concrete are the best recycled aggregates to use in reinforced concrete. Crushed mosaic, crushed ceramic, and crushed bricks can be used in plain concrete but cement content must be increased.
References
[1] Correia, J. R., de Brito, J., and Pereira, A. S., “ Effects on Concrete Durability of Using Recycled Ceramic Aggregates,” Materials and Structures, 2006.
[2] Etxeberria, M., Va´zquez, E. A., and Barra, M, “ Influence of Amount of Recycled Coarse Aggregates and Production Process on Properties of Recycled Aggregate Concrete,” Cement Concrete Res 37:735–742, 2007.
[3] Poon, C., Shui, Z., Lam, L., and Kou, S, “Influence of Moisture States of Natural and Recycled Aggregates on the Slump and Compressive Strength of Hardened Concrete,” Cem. Concr. Res 34(1):31–36, 2004.
[4] Meyer C., “ The Greening of the Concrete Industry,”. Cem. Concr. Compos, 2009.
[5] M. Etxeberria E A. R. Mar? E. E. Va´zquez, “Recycled aggregate concrete as structural material,” Materials and Structures (2007) 40:529–541.
[6] Knoeri, C., Sanyé-Mengual, E., and Althaus, H., “Comparative LCA of Recycled and Conventional Concrete for Structural Applications,” The International Journal of Life Cycle Assessment, 18(5), 909-918, 2013.
[7] Yang, J., and Jiang, G., “ Experimental Study on Properties of Pervious Concrete Pavement Materials,” Cem. Concr. Res 33:381–386, 2003.
[8] De Juan MS, Gutie´rrez PA (2009), “Study on the Influence of Attached Mortar Content on the Properties of Recycled Concrete Aggregate,” Const. Build Mater 23:872–877.
[9] Abbas, A., and others, “Environmental Benefits of Green Concrete,” EIC Climate Change Technology, 2006 IEEE, Ottawa, Canada, 1-8.
[10] Mehta, B. , “Reducing the Environmental Impact of Concrete,” Concrete International, Oct 2001, 61-66.
[11] Dosho, Y. ,“Development of a Sustainable Concrete Waste Recycling System Application of Recycled Aggregate Concrete Produced by Aggregate Replacing Method,” Journal of Advanced Concrete Technology, Japan Concrete Institute, 5(1), 27-42, 2007.
[12] Hendriks, C., and Janssen, G., “Use of Recycled Materials in Construction,” Materials and Structures, 36: 604–608, 2003.
Keywords
Fresh, hardened concrete, Recycled Aggregate, Coarse Aggregate, crushed.