Influence of CDW Recycled Aggregate on Drying Shrinkage of Mortar
- 1 Civil and Environmental Engineering Post-Graduate Program, State University of Feira de Santana, Feira de Santana, Bahia, Brazil
- 2 Civil and Environmental Engineering Post-Graduate Program, State University of Feira de Santana, Feira de Santana, Bahia, Brazil
Abstract
The use of fine recycled aggregates as raw material in the production of mortars appears as a good alternative to minimize waste disposal, so as to reduce natural resources consumption and to find and supply suitable substitutes for natural aggregates. However, the use of this alternative material in a safe way must be carried out by a wide investigation of its long term behavior. In this way, this paper will examine the mechanical strength, physical properties and drying shrinkage of mortar, which use recycled fine aggregates that have originated from construction and demolition waste (CDW) containing mortar (55%), ceramic (26%) and concrete (16%). Two natural mortars, made with natural sand, were produced with cement/sand ratios of 1:4 and 1:8 (by weight) and a fixed consistency index of 260 + 10 mm. Recycled mortar was produced with 50% of substitution rate, in volume, of natural aggregate by recycled one. Results show that recycled mortars present higher total porosity, absorption rate and drying shrinkage than reference mortar.
- I. Z. Bribián, A. V. Capilla and A. A. Usón, “Life Cycle Assessment of Building Materials: Comparative Analysis of Energy and Environmental Impacts and Evaluation of the Eco-Efficiency Improvement Potential,” Building and Environment, Vol. 46, No. 5, 2011, pp. 1133-1140.
- B. Norton and H. Skates, “Technologies for Sustainable Buildings,” World Renewable Energy Congress 6, Elsevier, New York, 2000.
- L. Evangelista and J. Brito, “Durability Performance of Concrete Made with Fine Recycled Concrete Aggregates,” Cement & Concrete Composites, Vol. 32, No. 1, 2010, pp. 9-14.
- C. J. Zega, Y. A. Villagran-Zaccardi and A. A. Di Maio, “Effect of Natural Coarse Aggregate Type on the Physical and Mechanical Properties of Recycled Coarse Aggregates,” Materials and Structures, Vol. 43, 2010, pp. 195-202. doi:10.1617/s11527-009-9480-4
- G. F. Kheder and S. A. Al-Windawi, “Variation in Mechanical Properties of Natural and Recycled Aggregate Concrete as Related to the Strength of Their Binding Mortar,” Materials and Structures, Vol. 38, 2005, pp. 701-709.
- V. Corinaldesi and G. Moriconi, “Behaviour of Cementitious Mortars Containing Different Kinds of Recycled Aggregate,” Construction and Building Materials, Vol. 23, No. 1, 2009, pp. 289-294.
- L. F. R. Miranda and S. M. S. Selmo, “CDW Recycled Aggregate Renderings: Part I—Analysis of the Effect of Materials Finer than 75 μm on Mortar Properties,” Construction and Building Materials, Vol. 209, 2006, pp. 615-629. doi:10.1016/j.conbuildmat.2005.02.025
- H. A. Mesbah and F. Buyle-Bodin, “Efficiency of Polypropilene and Metallic Fibres on Control of Shrinkage and Craking of Recycled Aggregates Mortars,” Construction and Building Materials, Vol. 13, No. 8, 1999, pp. 439-447.
- M. Leite, “Evaluation of the Mechanical Properties of Concrete Made with Aggregates from Construction and Demolition Waste,” PhD Thesis, Porto Alegre, 2001.
- H. J. Chen, T. Yen and K. H. Chen, “The Use of Building Rubbles in Concrete and Mortar,” Journal of the Chinese Institute of Engineers, Vol. 26, No. 2, 2003, pp. 227-236. doi:10.1080/02533839.2003.9670773
- A. Katz, “Properties of Concrete Made with Recycled Aggregate from Partially Hydrated Old Concrete,” Cement and Concrete Research, Vol. 33, No. 5, 2003, pp. 703-711.
- P. R. L. Lima, M. B. Leite, and E. Q. Santiago, “Recycled Lightweight Concrete Made from Footwear Industry Waste and CDW,” Waste Management, Vol. 30, No. 6, 2010, pp. 1107-1113.