P p"Gheorghe Asachi" Technical University of Iasi, Faculty of Civil Engineering and Building Services, 1, Prof. Dimitrie Mangeron Blvd

Conclusions

Experimental tests were performed based on a case with concrete that contains fly ash and polystyrene granules as aggregate as substitutes for aggregates, in dosages ranging from 20% to 100% volume. Experimental data highlights that polystyrene granules influence concrete characteristics. Polystyrene granules improve the workability of fresh concrete and decrease density. The resulted values in mechanical strength are smaller than those of the control mix and have a better behavior when in tension. Distribution of polystyrene granules in concrete mass is not uniform and granules have the tendency to flow, especially for higher dosages.

Use of concrete with polystyrene granules as a lightweight material for non-structural elements reduces the environment pollution by using waste materials and represents a reliable solution to reduce construction costs.

References

1. 
   J. Bolden, T. Abu-Lebdeh, E. Fini, Utilization of Recycled and Waste Materials in Various Construction Applications, American Journal of Environmental Science 2013;9 (1):14-24, doi: 10.3844/ajessp.2013.14.24.
   
2. 
   M. Barbuta, R. D. Bucur, S. M. Cimpeanu, G. Paraschiv, D. Bucur, Agroecology, Chapter 3, Wastes in Building Materials Industry, INTECH, Croatia, ISBN 978-953-51-2130-5, 2015, pp. 81-99.
   
3. 
   M., Barbuta, R. D., Bucur, A. A., Serbanoiu, C., Helepciuc, S., Scutarasu, A., Burlacu, Combined Effect of Fly Ash and Fibers on Properties of Cement Concrete, The 10th International Conference INTER-ENG 2016 Interdisciplinarity in Engineering, 2016 "Petru Maior" University of Targu-Mureş Romania, 2016.
   
4. 
   J. Sierra-Perez, I. Lopez-Fornies, J. Boschmonart-Rives, X. Gabarrell, Introducing Eco-ideation and Creativity Techniques to Increase and Diversify the Applications of Eco-materials: The case of cork in the building sector, Journal of Cleaner Production, 2016, vol. 137, pp. 606- 616.
   
5. 
   J. Kumar Prusty, S. Kumar Patro, S.S. Basarkar, Concrete using Agro-waste as Fine Aggregate for Sustainable Built Environment – A review, International Journal of Sustainable Built Environment, 2016, vol. 5, pp. 312–333.
   
6. 
   B. Skariah Thomas, R. Chandra Gupta, Properties of High Strength Concrete Containing Scrap Tire Rubber, Journal of Cleaner Production, 2016, vol. 113, pp. 86-92.
   
7. 
   O.A. Abaza, Z.S. Hussein, Flexural Behavior of Steel Fiber-reinforced Rubberized Concrete, Journal of Materials in Civil Engineering, 2015, vol. 28 (1), 04015076.
   
8. 
   R.Demirboga, K. Abdulkadir, Thermal Conductivity and Shrinkage Properties of Modified Waste Polystyrene Aggregate Concretes, Construction and Building Materials 35, 2012, pp. 730–734.
   
9. 
   W.C. Tang, H.Z. Cui, M. Wu, Creep and Creep Recovery Properties of Polystyrene Aggregate Concrete, Construction and Building Materials 51, 2014, pp. 338–343.
   
10. 
    A. Kan, R. Demirboga- A Novel Material for Lightweight Concrete Production, Cement and Concrete Composites, 31, 2009, pp. 489-495.
    
11. 
    A. Kaya, F. Kar, Properties of Concrete Containing Waste Expanded Polystyrene and Natural Resin, Construction and Building Materials 102, 2016, pp. 572–578.
    
12. 
    B. Chen, J. Liu, Mechanical Properties of Polymer-modified Concretes Containing Expanded Polystyrene Beads, Construction and Building Materials 21, 2007, pp. 7–11.
    
13. 
    B.A. Herki, J.M. Khatib, E. M. Negim, Lightweight Concrete made from Waste of Polystyrene and Fly Ash, World Applied Sciences Journal 21, 2013, (9) pp. 1356-1360.
    
14. 
    D. Saradhi Babu, K. Ganesh Babu, T. H. Wee, Properties of Lightweight Expanded Polystyrene Aggregate Concretes Containing Fly Ash, Cement and Concrete Research 35, 2005, pp. 1218-1223.
    
15. 
    Romanian Standard Association, Cement- Part 1: Composition, specifications and conformity criteria for common cements SR EN 197- 1:2011.
    
16. 
    Romanian Standard Association, Testing hardened concrete. Part 3: Compressive strength of test specimens, SR EN 12390-3:2005.
    
17. 
    Romanian Standard Association, Testing hardened concrete. Part 5: Flexural strength of test specimens, SR EN 12390-5:2005.
    
18. 
    Romanian Standard Association, Testing hardened concrete. Part 6: Split tensile strength of test specimens, SR EN 12390-6:2010.
    
19. 
    Romanian Standard Association, Testing hardened concrete. Density of hardened concrete, SR EN 12390-7:2005.