Page 368 - New Trends in Eco efficient and Recycled Concrete

Equivalent functional unit in recycled aggregate concrete 323

To overcome this limitation, a methodology has been proposed to define a truly
EFU. Because the relative performance of RA concrete greatly depends on the
property analysed, a conservative approach was adopted in which the RA concrete
element performs as well as, or better than, the natural RA concrete element in
each of the fundamental properties for the design of reinforced concrete elements.
The purpose is to gain the confidence of structural designers on the use of this new
material. In this chapter, the methodology is applied and validated for slabs, but it
has also been validated for beams.

References

Ahmad, S., 2003. Reinforcement corrosion in concrete structures, its monitoring and service
life prediction a review. Cem. Concr. Compos. 25 (4 5), 459 471.
Amorim, P., De Brito, J., Evangelista, L., 2012. Concrete made with coarse concrete aggre-
gate: Influence of curing on durability. ACI Mater. J. 109 (2), 195 204.
Barbudo, A., et al., 2013. Influence of water-reducing admixtures on the mechanical perfor-
mance of recycled concrete. J. Clean. Prod. 59.
Basheer, L., Kropp, J., Cleland, D.J., 2001. Assessment of the durability of concrete from its
permeation properties: a review. Constr. Build. Mater. 93 103.
Behera, M., et al., 2014. Recycled aggregate from C&D waste & its use in concrete a
breakthrough towards sustainability in construction sector: a review. Constr. Build.
Mater. 68, 501 516.
Blengini, G., 2006. Life cycle assessment tools for sustainable development: case studies for
mining and construction industries in Italy and Portugal. Universidade Te ´cnico de
Lisboa, Instituto Superior Te ´cnico. Portugal. PhD Thesis in Mining Engineering.
Blok, R., Giarma, C.S., Bikas, D.K., Kontoleon, K., Gerva ´sio, H., 2007. Life cycle assess-
ment general methodology. In: First Workshop COST Action C25: Sustainability of
Constructions, 2007, Lisbon, Portugal, pp. 1.3 1.9.
Braga, A., Silvestre, J., de Brito, J., 2017. Compared environmental and economic impact of
the life cycle of concrete with natural and recycled coarse aggregates. J. Clean. Prod.
162, 529 543.
Braunschweig, A., Kytzia, S., Bischof, S., 2011. Recycled concrete: environmentally benefi-
cial over virgin concrete?. In: LCM 2011 Towards Life Cycle Sustainability
Management. Berlin, Germany.
Bravo, M., de Brito, J., et al., 2015a. Durability performance of concrete with recycled aggre-
gates from construction and demolition waste plants. Constr. Build. Mater. 77,
357 369.
Bravo, M., et al., 2015b. Mechanical performance of concrete made with aggregates from
construction and demolition waste recycling plants. J. Clean. Prod. 99.
Bravo, M., De Brito, J., et al., 2015c. Performance of concrete made with recycled aggregates
from Portuguese CDW recycling plants. In: Key Engineering Materials, pp. 193 205.
¨
Cakır, O., 2014. Experimental analysis of properties of recycled coarse aggregate (RCA) con-
¸
crete with mineral additives. Constr. Build. Mater. 68, 17 25.
Cartuxo, F., et al., 2015. Rheological behaviour of concrete made with fine recycled concrete
aggregates—influence of the superplasticizer. Constr. Build. Mater. 89, 36 47.