Page 350 - New Trends in Eco efficient and Recycled Concrete

Equivalent functional unit in recycled aggregate concrete 307

1.800
X0 (hRC = 10 cm
1.700
XC1 (hRC = 10 cm)
1.600 XC2/XC3 (hRC = 10 cm)
XC4 (hRC = 10 cm)
1.500 X0 (hRC = 12 cm)
h RAC /h RC 1.400 XC2/XC3 (hRC = 12 cm)
XC1 (hRC = 12 cm)
XC4 (hRC = 12 cm)
1.300
1.200 X0 (hRC = 15 cm)
XC1 (hRC = 15 cm)
1.100 XC2/XC3 (hRC = 15 cm)
XC4 (hRC = 15 cm)
1.000 X0 (hRC = 18 cm)
XC1 (hRC = 18 cm)
0.900 XC2/XC3 (hRC = 18 cm)
0.800 0.900 1.000 1.100 1.200 1.300 1.400 1.500 1.600 1.700 1.800 1.900 2.000 2.100 2.200 2.300 2.400 2.500 XC4 (hRC = 18 cm)
α 3
as a function of α 3 for S3 (slabs).
Figure 11.3 K α 3

1.300
XD1/XS1 (hRC = 10 cm)
1.250
XD2/XS2 (hRC = 10 cm)
XD3/XS3 (hRC = 10 cm)
1.200 XD1/XS1 (hRC = 12 cm)
h RAC /h RC 1.150 XD2/XS2 (hRC = 12 cm)
XD3/XS3 (hRC = 12 cm)
XD2/XS2 (hRC = 15 cm)
1.100 XD1/XS1 (hRC = 15 cm)
XD3/XS3 (hRC = 15 cm)
XD1/XS1 (hRC = 18 cm)
1.050
XD2/XS2 (hRC = 18 cm)
XD3/XS3 (hRC = 18 cm)
1.000
1.000 1.050 1.100 1.150 1.200 1.250 1.300 1.350
α 4
as a function of α 4 for S3 (slabs).
Figure 11.4 K α 4
Eq. (11.9), where p qp,RAC and p qp,NAC represent the corresponding quasi-permanent
loads, and h RAC and h NAC are the heights of RAC and NAC slabs, respectively.

3

α 6 h RAC p qp;NAC
# (11.9)
α 2 h NAC p qp;RAC
The parametric study applied (Dobbelaere et al., 2016) to slabs showed that it is
possible to determine a trend for K α 6 =α 2 as a function of the relevant range of α 6 /α 2
(Fig. 11.5).
For different parametric conditions used, h RAC /h NAC reached about 1.6 for α 6 /α 2
ratios of about 3.1. Within the target limits known from the literature review
(α 6 5 1.17 and α 2 5 0.8), the ratio α 6 /α 2 was 1.46, leading to h RAC /h NAC equal to
1.17.