Investigating properties of fresh and hardened self-compacting concrete made of recycled aggregates
Subject Areas : Structural EngineeringPouria Javadi 1 , Ali Delnavaz 2
1 - Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
2 - Assistance Professor, Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
Keywords: Compressive Strength, self-compacting concrete, lightweight concrete, recycled aggregates,
Abstract :
Self-compacting concrete is a new high performance concrete with high ductility and segregation resistance. In recent years, construction material manufacturers have focused their attention on lightweight concrete and have strived to use lightweight concrete, if possible, in load-bearing parts of buildings. Concrete with both self-compacting and lightweight properties is favourable in this context which is the so-called lightweight self-consolidating concrete. Given the novelty of self-compacting concrete industry and increased amount of construction materials resulting from earthquake (due to seismic hazards of Iran) and destruction of different buildings, in particular urban decay, on the other hand, feasibility study on production of self-compacting concrete with these materials is justifiable in terms of costs, environment protection and energy conservation. Accordingly, coordination between self-compacting factor and utilising these materials is important. So, in this research, the effect of recycled aggregates on mechanical properties of lightweight self-compacting concrete was investigated. Specimens were analysed using 2 mix designs with different contents (cement) by Slump, J-Ring and compressive strength tests. Results indicated that mix designs containing waste LECA have good consistency and stability. Also, mix designs containing waste scoria have high strength. Hence, in order to achieve self-compacting and lightweight properties, it seems logical to use those two waste materials.
[1] Djelloul, O.K., Menadi, B., Wardeh, G. and Kenai, S., 2018. Performance of self-compacting concrete made with corase and fine recycled conceret aggregates and ground granulated blast-furnace slag. ADVANCES IN CONCRETE CONSTRUCTION,6(2), PP.103-121.
[2] Jelokhani Niaraki, R. and Farokhzad, R., predication of mechanical and fresh properties of self-consolidating concrete (SCC) using multi-objective genetic algorithm (MOGA). Journal of Structural Engineering and Geo-Techniques, 2017,7(2), PP.1-13.
[2] Gonzalez-Taboada, I., Gonzalez-Fonteboa, B., Martinez-Abella, F. and Seara-paz, SAnalysis of rheological behaviour of self-compacting concerete made with recycled aggregates. Construction and Building Mahdikhanils, 157,pp.18-25, 2017.
[3] Farokhzad, R.,Mahdikhani, M.,Bagheri,A. and Baghdadi, J, Representing a logical grading zone for self-consolidating concrete.Construction and Bulding Materials,115,pp.735-745, 2016.
[4] Okamura, H. and M. Ouchi, Self-Compacting Concrete. Journal of Advanced Concrete Technology, 2003. 1(1): p. 5-15.
[5] Khayat, K., Workability, testing, and performance of self-consolidating concrete. Materials Journal, 1999. 96(3): p. 346-353.
[6] Libre, N.A., R. Khoshnazar, and M. Shekarchi, Relationship between fluidity and stability of self-consolidating mortar incorporating chemical and mineral admixtures. Construction and Building Materials, 2010. 24(7): p. 1262-127.
[7] Sedaghatdust, Arash, Peyman, investigating the effect of zeolite on compressive strength of lightweight concrete, First national conference on concrete industry, 2011.
[8] Ebrahimi, Hamidreza, Evaluating shear behavior of armed concrete beams manufactured with high strength SCC, Comparison with normal concrete, M.A thesis, Mazandaran University, Iran, 2007.