It can be observed that compared to the control mix, the 28-day compressive strength of PP25, PP50, and PP75 increased by 8.1%, 9.8%, and 14.2%, respectively, and the 28-day compressive strength of G25, G50, and G75 increased by 6.1%, 14.6%, and 19.1%, respectively.
Mix code Cement SF Water (kg/[m.sup.3]) (kg/[m.sup.3]) (kg/[m.sup.3]) Control 550 55 180 PP25 550 55 180 PP50 550 55 180 PP75 550 55 180 G25 550 55 180 G50 550 55 180 G75 550 55 180 Mix code Sand SP PS (kg/[m.sup.3]) (kg/[m.sup.3]) (kg/[m.sup.3]) Control 780 5.5 360 PP25 780 5.5 360 PP50 780 5.5 360 PP75 780 5.5 360 G25 780 5.5 360 G50 780 5.5 360 G75 780 5.5 360 Mix code PP fibre (%) G fibre (%) Control 0 0 PP25 0.25 0 PP50 0.50 0 PP75 0.75 0 G25 0 0.25 G50 0 0.50 G75 0 0.75 Table 4: Compressive strength of concretes.
The PP98, PP93, PP50, and PP0 composites (samples are referenced by their PP content at constant 2% CNT loading, see Experimental Part) have a conductivity comprised between [10.sup.-13] S/m and 1 S/m in the explored frequency range, while the dielectric constant value ranges from 3 to 1000.
When SEPS is absent (PP98) or poorly dispersed (large agglomerates of SEPS inside PP are observed in PP50 after only 1 min annealing), some micrometric agglomerates of CNT are always present.
In the case of PP50, [D.sub.n] is 29.2 [micro]m and [C.sub.d] is 28.7 respectively, which are mildly reduced.
1, some brighter grains locate sporadically in both core region of PP50 (shown by yellow arrows).
The highest pH with a significant difference was measured in sausages containing 0.01% nitrite only, whereas the PP25 or PP50 sausages had the lowest pH values during storage (p<0.05).
Additionally, more residual nitrite was measured among sausages in the SP25 and SP50 treatments than sausages in the PP25 and PP50 treatments during the 6 wks of storage.
Conditions were considered stable if session-to-session variability of total trials played was low and there was no trend in the direction of expected behavior change (e.g., an increasing trend in a PP75 condition would be considered stable if it was to be followed by a PP50 condition).
When the percentage payback was reduced to PP50, total trials decreased sharply and continued to decrease across the condition.
Materials were designated PP0, PP10, PP20, PP30, PP40 and PP50
according to the weight percent of talc present.
Standard samples of HDPE, iPP and their blends with compositions of 90/10, 50/50, and 10/90 (denoted as PP10, PP50
, and PP90, respectively) were produced by an injection molding machine (Engel ES-28) directly from neat and manually-mixed pellets, using a standard test specimen mold (the dimensions conformed to type I specimens of ASTM Method D638 for tensile and ASTM Method D256 for impact tests).