Indexing
All Issues
Submission
Author Guidelines
Reviewers
Editorial Members
Publication Fee
Vol.1 , No. 1, Publication Date: Mar. 2, 2018, Page: 26-33
 to produce recycled aggregates and to substitute partially natural aggregates, will adversely affects the quality of the new concrete. The type of waste material in the parent concrete and the adhered mortar attached to the natural aggregate particles are main factors affecting the obtained concrete quality. Therefore, this study has focused on detecting the acceptable amount of adhered mortar on the recycled aggregates without significantly affecting concrete properties. The ultrasonic pulse velocity has been implemented as an indication of concrete quality. The results showed that the type and the amount of the old residual mortar content (RMC) have significant effect on the behaviour of ultrasonic pulses in concrete, and hence on its strength. The results indicate that 10% RMC will have accepted reduction in concrete strength.&picture=http://www.aascit.org/aascit/decorators/img/journal/810.jpg)
| [1] | Iqbal Marie, Civil Engineering Department, Faculty of Engineering, The Hashemite University, Zarka, Jordan. |
The reuse of certain industrial and construction waste materials as a substitute to certain conventional materials in concrete mixtures will diminish the environmental problems that may be generated by diverting these materials to the landfill in addition to the conservation of raw materials. However, using concrete having waste materials (parent concrete) to produce recycled aggregates and to substitute partially natural aggregates, will adversely affects the quality of the new concrete. The type of waste material in the parent concrete and the adhered mortar attached to the natural aggregate particles are main factors affecting the obtained concrete quality. Therefore, this study has focused on detecting the acceptable amount of adhered mortar on the recycled aggregates without significantly affecting concrete properties. The ultrasonic pulse velocity has been implemented as an indication of concrete quality. The results showed that the type and the amount of the old residual mortar content (RMC) have significant effect on the behaviour of ultrasonic pulses in concrete, and hence on its strength. The results indicate that 10% RMC will have accepted reduction in concrete strength.
Keywords
Recycled Aggregate, Ultrasonic Test, Non-destructive Testing, Residual Mortar Content, Parent Concrete
Reference
| [01] | I. Marie and H. Quiasrawi, “Closed-loop recycling of recycled concrete aggregates,” J. Clean. Prod., vol. 37, pp. 243–248, 2012. |
| [02] | S. S. Jamkar and C. B. K. Rao, “Index of Aggregate Particle Shape and Texture of coarse aggregate as a parameter for concrete mix proportioning,” Cem. Concr. Res., vol. 34, no. 11, pp. 2021–2027, Nov. 2004. |
| [03] | X. Gu, Y. Tran, and L. Hong, “Quantification of coarse aggregate shape in concrete,” Front. Struct. Civ. Eng., vol. 8, no. 3, pp. 308–321, Sep. 2014. |
| [04] | A. M. Neville, Properties of concrete. J. Wiley, 1996. |
| [05] | G. Trtnik, F. Kavčič, and G. Turk, “Prediction of concrete strength using ultrasonic pulse velocity and artificial neural networks,” Ultrasonics, vol. 49, no. 1, pp. 53–60, Jan. 2009. |
| [06] | D. Breysse, “Nondestructive evaluation of concrete strength: An historical review and a new perspective by combining NDT methods,” Constr. Build. Mater., vol. 33, pp. 139–163, Aug. 2012. |
| [07] | M. Batayneh, I. Marie, and I. Asi, “Use of selected waste materials in concrete mixes,” Waste Manag., vol. 27, no. 12, pp. 1870–1876, 2007. |
| [08] | M. K. Batayneh, I. Marie, and I. Asi, “Promoting the use of crumb rubber concrete in developing countries,” Waste Manag., vol. 28, no. 11, pp. 2171–2176, 2008. |
| [09] | S. Ismail and M. Ramli, “Engineering properties of treated recycled concrete aggregate (RCA) for structural applications,” Constr. Build. Mater., vol. 44, pp. 464–476, Jul. 2013. |
| [10] | S. Ismail and M. Ramli, “Engineering properties of treated recycled concrete aggregate (RCA) for structural applications,” Constr. Build. Mater., vol. 44, pp. 464–476, Jul. 2013. |
| [11] | L. Butler et al., “Quantification of Recycled Concrete Aggregate (RCA) Properties for Usage in Bridges and Pavements: An Ontario Case Study,” in Conference of the Transportation Association of Canada, 2011. |
| [12] | M. S. de Juan and P. A. Gutiérrez, “Study on the influence of attached mortar content on the properties of recycled concrete aggregate,” Constr. Build. Mater., vol. 23, no. 2, pp. 872–877, Feb. 2009. |
| [13] | H. Y. Qasrawi and I. A. Marie, “The use of USPV to anticipate failure in concrete under compression,” Cem. Concr. Res., vol. 33, pp. 2017–2021, 2003. |
| [14] | M. S. de Juan and P. A. Gutiérrez, “Study on the influence of attached mortar content on the properties of recycled concrete aggregate,” Constr. Build. Mater., vol. 23, no. 2, pp. 872–877, 2009. |
| [15] | I. Sallehan and R. Mahyuddin, “A Study on the Effect of Surface-Treated Coarse Recycled Concrete Aggregate (RCA) on the Compressive Strength of Concrete,” Adv. Mater. Res., vol. 935, no. 8, pp. 184–187, 2014. |
| [16] | V. M. Malhotra and N. J. Carino, Handbook on nondestructive testing of concrete. CRC Press, 2004. |
