OPEN ACCESS
A new cement-based material is presented in this research contribution. The material consists in a fibre-reinforced self-compacting concrete with 100% of mixed recycled aggregate. Six different mixes were produced in two different conditions: (1) in a concrete plant in order to verify the adaptability of the existing equipment to produce and pour this material under real boundary conditions and (2) in laboratory controlled conditions. A physical (density, porosity, fibre distribution and orientation) and mechanical (compressive, tensile and post-cracking strengths, Young modulus) characterization involving 1,100 specimens was carried out. The results obtained permit to conclude that compressive concrete strength superior to 30 MPa can be achieved with certain ductility and tenacity. In based of these results, this material could be used in applications like foundations, ground-supported slabs, retaining systems and other elements with moderate structural responsibility.
fibres, mechanical properties, recycling, residual/internal stress, self-compacting concrete
[1] Cândido, L., Kindlein, W., Demori, .R, Carli, L., Mauler, R. & Oliveira, R., The recy- cling cycle of materials as a design project tool. Journal of Cleaner Production, 19(13), pp. 1438–1445, 2011.https://doi.org/10.1016/j.jclepro.2011.04.017
[2] Adazabra, A.N., Viruthagiri, G. & Ravisankar, R., Cleaner production in the Shea indus- try via the recovery of Spent Shea Waste for reuse in the construction sector. Journal of Cleaner Production, 122, pp. 335–344, 2016. https://doi.org/10.1016/j.jclepro.2016.02.045
[3] Blessen Skariah, T., Ramesh Chandra, G. & Vinu John, P., Recycling of waste tire rubber as aggregate in concrete: durability-related performance. Journal of Cleaner Production, 112(1), pp. 504–513, 2016.https://doi.org/10.1016/j.jclepro.2015.08.046
[4] Bogas, J.A., de Brito, J. & Ramos, D., Freeze-thaw resistance of concrete produced with fine recycled concrete aggregates. Journal of Cleaner Production, 115, pp. 294–306, 2016. https://doi.org/10.1016/j.jclepro.2015.12.065
[5] Sua-Iam, G. & Makul, N., Utilization of coal- and biomass-fired ash in the production of self-consolidating concrete: a literatura review. Journal of Cleaner Production, 100, pp. 59–76, 2015.https://doi.org/10.1016/j.jclepro.2015.03.038
[6] Agrela, F., Barbudo, A., Ramírez, A., Ayuso, J., Carvajal, M.D. & Jiménez, J.R., Construction of road sections using mixed recycled aggregates treated with cement in Malaga, Spain. Resources Conservation Recycling, 58, pp. 98–106, 2012. https://doi.org/10.1016/j.resconrec.2011.11.003.
[7] Herrador, R., Pérez, P., Garach, L. & Ordóñez, J., Use of recycled construction and demolition waste aggregate for road course surfacing. Journal of Transportation Engi- neering, 138(2), pp. 182–190, 2012.https://doi.org/10.1061/(ASCE)TE.1943-5436.0000320
[8] Jíménez, J.R., Agrela, F., Ayuso, J. & López, M., Estudio comparativo de los áridos reciclados de hormigón y mixtos como material para sub-bases de carreteras. Materials de Construccion, 61(302), pp. 289–302, 2011.https://doi.org/10.3989/mc.2010.54009
[9] Park, T., Application of construction and building debris as base and subbase materials in rigid pavement. Journal of Transportation Engineering, 129(5), pp. 558–563, 2003. https://doi.org/10.1061/(ASCE)0733-947X(2003)129:5(558)
[10] Bravo, M., de Brito, J., Pontes, J. & Evangelista, L., Durability performance of concrete with recycled aggregates from construction and demolition waste plants. Construction and Building Materials, 77, pp. 357–369, 2015. https://doi.org/10.1016/j.conbuildmat.2014.12.103
[11] Sánchez de Juan, M. & Alaejos Gutiérrez, P., Study on the influence of attached mortar content on the properties of recycled concrete aggregate. Construction and Building Materials, 23(2), pp. 872–877, 2009. https://doi.org/10.1016/j.conbuildmat.2008.04.012
[12] Marinković, S., Radonjanin, V., Malešev, M. & Ignjatović, I., Comparative environmen- tal assessment of natural and recycled aggregate concrete. Waste Management, 30(11), pp. 2255–2264, 2010.https://doi.org/10.1016/j.wasman.2010.04.012
[13] Marie, I. & Quiasrawi, H., Closed-loop recycling of recycled concrete aggregates. Journal of Cleaner Production, 37, pp. 243–248, 2012. https://doi.org/10.1016/j.jclepro.2012.07.020
[14] Poon, C.S., Shui, Z.H. & Lam, L., Effect of microstructure of ITZ on compressive strength of concrete prepared with recycled aggregates. Construction and Building Materials, 18(6), pp. 461–468, 2004. https://doi.org/10.1016/j.conbuildmat.2004.03.005
[15] The International Federation for Structural Concrete (fib). The fib Model Code for Concrete Structures 2010. KGaA, Weinheim, German: Wiley-VCH Verlag GmbH & Co.; 2013.
[16] Di Prisco, M., Plizzari, G. & Vandewalle, L., Fibre reinforced concrete: New design perspectives. Materials and Structures, 42(9), pp. 1261–1281, 2009.https://doi.org/ 10.1617/s11527-009-9529-4
[17] Walraven, J.C., High performance fibre reinforced concrete: progress in knowledge and design codes. Materials and Structures, 42, p. 1247, 2009. https://doi.org/10.1617/s11527-009-9538-3
[18] Casanovas, M del M., Armengou, J. & Ramos, G., Occupational risk index for assess- ment of risk in construction work by activity. Journal of Construction Engineering and Management, 140(1), 2014.https://doi.org/10.1061/(ASCE)CO.1943-7862.0000785
[19] Chiaia, B., Fantilli, A.P. & Vallini, P., Minimum reinforcement and fiber contribution in tun- nel linings: the Italian experience. Proceeding Fourth International Structural Engineering and Construction Conference, Melbourne: Taylor & Francis Group; 2007, pp. 365–370. https://doi.org/porto.polito.it/id/eprint/1660903
[20] Fantilli, A.P., Chiaia, B., Gorino, A., Unified approach for minimum reinforcement of concrete beams. ACI Structural Journal, 113(5), 1107–1116, 2016. https://doi.org/10.14359/51688927
[21] Tegguer, A.D., Determining the water absorption of recycled aggregates utilizing hydro- static weighing approac. Construction and Building Materials, 27(1), pp. 112–116, 2012. https://doi.org/10.1016/j.conbuildmat.2011.08.018
[22] IHOBE SP de GA. Usos de áridos reciclados mixtos procedentes de Residuos de Con- strucción y Demolición. Investigación prenormativa. Bilbao, Spain: Departamento de Medio Ambiente, Planificación Territorial, Agricultura y Pesca. Gobierno Vasco.; 2011.
[23] Tam, V.W.Y., Gao, X.F. & Tam, C.M., Microstructural analysis of recycled aggregate concrete produced from two-stage mixing approach. Cement and Concrete Research, 35(6), pp. 1195–1203, 2005.https://doi.org/10.1016/j.cemconres.2004.10.025
[24] Molins, C., Aguado, A. & Saludes, S., Double punch test to control the energy dissipa- tion in tension of FRC (Barcelona test). Materials and Structures, 42(4), pp. 415–425, 2008.https://doi.org/10.1617/s11527-008-9391-9
[25] UNE 83515. Fibre reinforced concrete. Determination of cracking strength, ductility and residual tensile strength. Barcelona test. AENOR - Spanish Association for Stan- dardisation and Certification; 2010.
[26] Pujadas, P., Blanco, A., Cavalaro, S.H.P., Aguado, A., Grünewald, S., Blom, K. & Walraven, J.C., Plastic fibres as the only reinforcement for flat suspended slabs: Parametric study and design considerations. Construction and Building Materials, 70, pp. 88–96, 2014. https://doi.org/10.1016/j.conbuildmat.2014.07.091
[27] Pujadas, P., Blanco, A., Cavalaro, S., De la Fuente, A. & Aguado, A., New analytical model to generalize the Barcelona test using axial displacement. Journal of Civil Engineering and Management, 19(2), pp. 259–271, 2013. https://doi.org/10.3846/13923730.2012.756425
[28] EN 12390-3. Testing hardened concrete - Part 3: Compressive strength of test specimens. CEN - European Committee for Standarization; 2009.