Figure 3 shows the particle size distributions and Figure 4 represents the relationship between sphericity parameter and coarse fraction
Furthermore, downsampling is conducted on the fraction images to obtain lower coarse fraction
images, whose sizes are 90 x 90.
Current study evaluates a Coarse Fraction
(< 200 micrometers) and a Fine Fraction (50 micrometers) of basaltic residue, both obtained by sedimentation, as a mineral admixture to Portland cement.
These correlations are considered moderate and this might indicate that in the beginning of the sampling the fine fraction does not have a representative role in the coarse fraction
. Over time the fine PM contribution increased, whereas the [PM.sub.10] concentrations did not vary significantly (Figure 2).
When preparing the test concretes, the coarse fraction
8-16 mm of the Olbramovice natural aggregate was replaced with raw concrete recylcate from the Dufonev s.r.o.
In addition, the result indicated that the sensitive response of SOC to tillage conversion could be shown in the coarse fraction
. There were no significant differences in the proportions of [C.sub.3]-C and C4-C between the NT and MP treatments (P > 0.05, Table 1).
The CA ratio is used to design and evaluate the packing of the coarse fraction
and the resulting voids structure.
In real circumstances, the coarse fraction
of fly ash emissions will be a local concern without any significant regional impact.
Other particles may have an average diameter of 200 to 400 Im (main fraction some may be considerably larger (coarse fraction