Next Article in Journal
Previous Article in Journal
Materials 2014, 7(4), 3176-3197; doi:10.3390/ma7043176
Article

Corrosion Behavior of Steel Reinforcement in Concrete with Recycled Aggregates, Fly Ash and Spent Cracking Catalyst

1
, 2
, 1
, 1
 and 1,*
Received: 5 March 2014; in revised form: 19 March 2014 / Accepted: 11 April 2014 / Published: 21 April 2014
(This article belongs to the Section Advanced Composites)
View Full-Text   |   Download PDF [588 KB, uploaded 21 April 2014]   |   Browse Figures
Abstract: The main strategy to reduce the environmental impact of the concrete industry is to reuse the waste materials. This research has considered the combination of cement replacement by industrial by-products, and natural coarse aggregate substitution by recycled aggregate. The aim is to evaluate the behavior of concretes with a reduced impact on the environment by replacing a 50% of cement by industrial by-products (15% of spent fluid catalytic cracking catalyst and 35% of fly ash) and a 100% of natural coarse aggregate by recycled aggregate. The concretes prepared according to these considerations have been tested in terms of mechanical strengths and the protection offered against steel reinforcement corrosion under carbonation attack and chloride-contaminated environments. The proposed concrete combinations reduced the mechanical performance of concretes in terms of elastic modulus, compressive strength, and flexural strength. In addition, an increase in open porosity due to the presence of recycled aggregate was observed, which is coherent with the changes observed in mechanical tests. Regarding corrosion tests, no significant differences were observed in the case of the resistance of these types of concretes under a natural chloride attack. In the case of carbonation attack, although all concretes did not stand the highly aggressive conditions, those concretes with cement replacement behaved worse than Portland cement concretes.
Keywords: recycled aggregate; spent catalytic cracking catalyst; fly ash; concrete; corrosion; mechanical properties recycled aggregate; spent catalytic cracking catalyst; fly ash; concrete; corrosion; mechanical properties
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Gurdián, H.; García-Alcocel, E.; Baeza-Brotons, F.; Garcés, P.; Zornoza, E. Corrosion Behavior of Steel Reinforcement in Concrete with Recycled Aggregates, Fly Ash and Spent Cracking Catalyst. Materials 2014, 7, 3176-3197.

AMA Style

Gurdián H, García-Alcocel E, Baeza-Brotons F, Garcés P, Zornoza E. Corrosion Behavior of Steel Reinforcement in Concrete with Recycled Aggregates, Fly Ash and Spent Cracking Catalyst. Materials. 2014; 7(4):3176-3197.

Chicago/Turabian Style

Gurdián, Hebé; García-Alcocel, Eva; Baeza-Brotons, Francisco; Garcés, Pedro; Zornoza, Emilio. 2014. "Corrosion Behavior of Steel Reinforcement in Concrete with Recycled Aggregates, Fly Ash and Spent Cracking Catalyst." Materials 7, no. 4: 3176-3197.


Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert