[en] In recent years the increasing interest for eco-sustainable building materials and the rising issue of plastic waste disposal are leading to the engineering of new composite construction materials incorporating post consumer recycled plastics, able at the same time to meet new standard requirements, in terms of energy efficiency, and to reduce the consumption of natural resources. In the context of these issues, we have performed investigations on the effects of the addition of foamed artificial aggregates deriving from recycled plastic materials to a cementitious mortar. For this purpose, several mortar samples containing natural sand and different amounts (10, 25 and 50 % by volume) of foamed recycled plastic wastes were produced. The foaming of the recycled plastic waste was performed in laboratory by a foam extrusion process using a blowing agent (2 wt.%). An artificial aggregates particle size distribution similar to standard sand was used. Rheological and physical properties of lightweight mortar were studied. The improved surface roughness of foamed plastic aggregates ensures a more continuous interface and the presence of surface pores provides interlocking effect with cement paste. Replacement of natural sand by artificial aggregates produces a lightweight mortar but reduces mechanical properties.
Disciplines :
Chemical engineering Materials science & engineering Civil engineering
Frigione, M, "Recycling of PET bottles as fine aggregate in concrete," Waste Management, V. 30, No. 6, June 2010, pp. 1101-1106.
Kan, A., Demirboǧa, R., "A novel material for lightweight concrete production," Cement & Concrete Composites, V. 31, No. 7, August 2009, pp. 489-495.
Reis, J.M.L., Carneiro, E.P., "Evaluation of PET waste aggregates in polymer mortars," Construction and Building Materials, V. 27, No. 1, February 2012, pp. 107-111.
Albano, C, Camacho, N., Hernandez, M., Matheus, A., Gutierrez, A., "Influence of content and particle size of waste pet bottles on concrete behavior at different w/c ratios," Waste Management, V. 29, No. 10, October 2009, pp. 2707-2716.
Marzouk, O. Y., Dheilly, R.M., Queneudec, M, "Valorization of post-consumer waste plastic in cementitious concrete composites," Waste Management, V. 27, No. 2, 2007, pp. 310-318.
Panyakapo. P., Panyakapo, M., "Reuse of thermosetting plastic waste for lightweight concrete," Waste Management, V. 28, No. 9, 2008, pp. 1581-1588.
Herrero, S., Mayor, P., Hernandez-Olivares, F., "Influence of proportion and particle size gradation of rubber from end-of-life tires on mechanical, thermal and acoustic properties of plaster-rubber mortars," Materials and Design, V. 47, May 2013, pp. 633-642.
Shu, X., Huang, B., "Recycling of waste tire rubber in asphalt and portland cement concrete: An overview," Construction and Building Materials, V. 67, PartB, September 2014, pp. 217-224.
Choi, Y.-W., Moon, D-J., Chung, J.-S., Cho, S.-K., "Effects of waste PET bottles aggregate on the properties of concrete," Cement and Concrete Research, V. 35, No. 4, April 2005, pp. 776-781.
Ismail, Z. Z., Al-Hashmi, E. A., "Use of waste plastic in concrete mixture as aggregate replacement," Waste Management, V. 28, No. 11, November 2008, pp. 2041-2047.
Lo, T.Y., Cui, H.Z., "Effect of porous lightweight aggregate on strength of concrete," Materials Letters, V. 58, No. 6, February 2004, pp. 916-919.
Gutiérrez-González. S., Gadea, J., Rodriguez, A., Junco, C, Calderón, V., "Lightweight plaster materials with enhanced thermal properties made with polyurethane foam wastes," Construction and Building Materials, V. 28, No. 1, March 2012, pp. 653-658.
Kan, A., Demirboga, R., "Effect of cement and EPS beads ratios on compressive strength and density of lightweight concrete," Indian Journal of Engineering & Materials Sciences, V. 14, No. 2, April 2007, pp. 158-162.
Chena, B., Liu, J., "Properties of lightweight expanded polystyrene concrete reinforced with steel fiber," Cement and Concrete Research, V. 34, No. 7, July 2004, pp. 1259-1263.
Madandoust, R., and Ranjbar., M. M., Mousavi, S. Y., "An investigation on the fresh properties of self-compacted lightweight concrete containing expanded polystyrene," Construction and Building Materials, V. 25, No. 9, September 2011, pp. 3721-3731.
da Silva, A. M., de Brito. J., Veiga, R., "Incorporation of fine plastic aggregates in rendering mortars," Construction and Building Materials, V. 71, November 2014, pp. 226-236.
Gadea, J., Rodriguez, A., Campos, PL., Garabito, J., Calderón, V., "Lightweight mortar made with recycled polyurethane foam," Cement and Concrete Composites, V. 32, No. 9, October 2010, pp. 672-677.
Bentz, D. P., "Influence of internal curing using lightweight aggregates on interfacial transition zone percolation and chloride ingress in mortars," Cement and Concrete Composites, V. 31, No. 5, May 2009, pp. 285-289.
Reis, J.M.L., Chianelli-Junior, R., Cardoso, J.L., Marinho, F.J.V., "Effect of recycled PET in the fracture mechanics of polymer mortar," Construction and Building Materials, V. 25, No. 6, June 2011, pp. 2799-2804.
UNI EN 933-1, Tests for geometrical properties of aggregates: Determination of particle size distribution, sieving method. Ente Nazionale Italiano di Unificazione, Milano, April 1999.
UNI EN 196-1, Methods of testing cement: Determination of strength. Ente Nazionale Italiano di Unificazione, Milano, September 1996.
UNI EN 1097-3, Tests for mechanical and physical properties of aggregates. Determination of loose bulk density and voids. Ente Nazionale Italiano di Unificazione, Milano, October 1999.
UNI EN 1097-6, Tests for mechanical and physical properties of aggregates. Determination of particle density and water absorption. Ente Nazionale Italiano di Unificazione, Milano, August 2013.
UNI EN 1015-3, Methods of test for mortar for masonry: Determination of consistence of fresh mortar (by flow table). Ente Nazionale Italiano di Unificazione, Milano, June 2000.