Abrasion resistance of concrete made with recycled aggregates

Figures & data

Figure 1 Two steps of the abrasion resistance test.

Figure 2 Average loss of thickness by abrasion Δl (cm) vs. replacement ratio (%). (a) Rosa (2002), (b) Matias and de Brito (2005), (c) Evangelista (2007) and (d) Fonseca (2009). OEC, outer environment; LCC, laboratory conditions; WCC, wet chamber; WIC, water immersion.

Table 1 Densities (D) and water absorptions (WA) of the aggregates used.

	Rosa		Matias and de Brito		Evangelista		Fonseca
	D (kg/m^3)	WA (%)	D (kg/m^3)	WA (%)	D (kg/m^3)	WA (%)	D (kg/m^3)	WA (%)
FNA	2727	0.9	2544	0.8	2544	0.8	2.540–2590	0.4–05
FRA	–	–	–	–	1913	13.1	–	–
CNA	2690	1.0	2632	0.8	2566–2611	0.7–13.1	2510–2570	1.3–1.7
CRA	2019	12.0	2355	4.1	–	–	2310	6.1
Notes: FNA, fine natural aggregates; FRA, fine RAs; CAN, coarse natural aggregates and CRA, coarse RAs.

Figure 3 Ratio of concrete abrasion mass losses (Δl _RAC/Δl _RC) between RAC and RC vs. the ratio of the densities D (a) and water absorptions WA, (b) of the mixture of aggregates (Fonseca 2009).

Rosa, A.S., 2002. Use of coarse ceramic aggregates in concrete production (in Portuguese). Thesis (Masters in Construction). Instituto Superior Técnico, Technical University of Lisbon, Portugal

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Matias, D. and de Brito, J., 2005. Concrete with coarse recycled concrete aggregates resorting to plasticisers – experimental study performed at IST (in Portuguese). Report ICIST DTC 3/05, Instituto Superior Técnico, Technical University of Lisbon, Portugal

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Evangelista, L., 2007. Concrete made with fine recycled concrete aggregates (in Portuguese). Thesis (Masters in Construction). Instituto Superior Técnico, Technical University of Lisbon, Portugal

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Fonseca, N., 2009. Structural concrete with incorporated recycled concrete coarse aggregates. Influence of the curing conditions on the mechanical behaviour (in Portuguese). Thesis (Masters in Civil Engineering). Instituto Superior Técnico, Technical University of Lisbon, Portugal

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