Excerpts

At 28 days, the compressive strength of cement-based materials gradually increased with extended CO 2 injection time under atmospheric mixing, while a decreasing trend was observed under bubble mixing.

As shown in Figure 8 , with the increase of reaction temperature, the maximum apparent reaction extent presented an increasing trend.

In contrast, in the Fe–O–C system, the reduction capacity of CO shows a decreasing trend with the rise of reaction temperature, since a higher mole fraction of CO is needed to maintain the reduction degree.

For such conditions, the frictional moment was often unstable (significant fluctuations over time), and a decreasing trend was observed.

When combined with the data in Table 3 , a clear trend emerges: as the grit size of the sandpaper increases, the surface roughness (Ra) of the polished copper tube decreases gradually.

However, when the temperature increased to 1100 °C, the grain size showed a decreasing trend.

When heated at a rate of 5 °C/min, the volume fractions of the precipitated phases are 1.1%, 1.3%, and 1.5%, respectively, showing an increasing trend with temperature ( Figure 9 a–c).

Analyzing the mechanical properties, an increasing trend in flexural modulus and flexural strength can be observed, at the expense of decreasing values for Young’s modulus and tensile strength ( Figure 11 ).

The results indicate a clear trend: E corr shifts negatively and i corr increases with prolonged immersion.

Figure 9 d shows the change curve of electrode liquid temperature in the process of electrolysis for 5 h, and the curve shows an overall trend of increase.

The n 2 exhibited an increasing trend with the immersion duration (up to ≈0.9), suggesting a gradual smoothing process within this part of the corrosion mechanism.

In contrast, the CR of the samples exhibits an increasing trend.

The meshes of all samples doped with MoS 2 nanosheets showed a decreasing trend compared with the original sample, and the mesh surface showed many dense protrusions.

Given the wide range of filament manufacturers, there may be significant differences in material properties.

Overall, the G* of asphalt presents a decreasing trend, while the δ shows an increasing trend with the test temperature, which is due to the molecules in the asphalt transforming from the frozen state into the flowing state owing to the elevated test temperature, and the asphalt changing from the elastic state to the viscous state, and the flow ability gradually increasing.

The experimental results indicate that with the increased stabilizer dosage, the density and mass of the specimens show a decreasing trend, while the expansion ratio increases.

The R po values showed an increasing trend from 0.11 MΩ cm 2 (1 h) to 1.14 MΩ cm 2 (after 7 days), which, given that the R po remains constant and n po fluctuates around 0.98, could be attributed to the effective formation of a more compact layer with high resistance to ion transport.

The mixing process has a highly significant effect on the Marshall stability and coefficient of the area–distance variation in CRAM specimens, and a significant effect on bulk density and void ratio.

Therefore, the cooling rate exhibited an increasing trend along the penetration direction, further influencing the microstructure and mechanical properties.

For the cathodic polarization curves, a clear trend emerges: as the cathodic overpotential goes up, the cathodic corrosion current first rises rapidly and then increases at a slower rate.

AFt crystals, known for their strong water absorption due to containing abundant crystallization water and adsorbing large amounts of free water in their structural gaps, show an increasing trend in quantity as the substitution rate of quick-setting component in cementitious material rises, as evidenced by the enhanced relevant absorption bands.

It is evident that both yield strength and hardness exhibit a decreasing trend as the grain size increases.

(2) In the water-saturated supercritical CO 2 environment, with the increase in Cr content, the corrosion rate shows a decreasing trend (0.38Cr:0.0379 mm/y→1.17Cr:0.0291 mm/y).

The applied doses of WBA had a highly significant and positive effect on the stabilization of basic soil properties.

The potential difference between the cathode area and the anode area showed a trend of first increasing and then decreasing with time, and the conclusions obtained are consistent with the study of Juxin Fang [ 27 ]. 4.