A state-of-the-art review of compaction control test methods and intelligent compaction technology for asphalt pavements

In-situ Spot Test Measurements and Icmvs for Asphalt Pavement: Lack of Correlations and the Effect of Underlying Support

“…Table 1 Correlation between ICMV and asphalt density [adapted from (Sivagnanasuntharam et al, 2021)].…”

“…Therefore, an optimum sample width should be selected, which is large enough to obtain accurate FFT and small enough to have sufficient spatial resolution in the ICMV calculation. Commercially-available IC rollers report ICMV every 0.3 m (Sivagnanasuntharam et al, 2021). Therefore, the calculation of ICMV every 0.1 m is sufficient to capture the local variation in ICMVs.…”

“…Nevertheless, the correlation analysis performed using the density and ICMV data separately for each spot also show a poor correlation (R 2 < 0.1). The main reasons for these poor correlations could be the influences of the underlying support and asphalt temperature on ICMVs (Sivagnanasuntharam et al, 2021).…”

“…Further, 𝐸𝐸 𝑉𝑉𝑉𝑉𝑉𝑉 is independent of roller dimension. Sivagnanasuntharam et al (2021) suggested that a suitable correction factor is required to decouple the effect of underlying support on 𝐸𝐸 𝑉𝑉𝑉𝑉𝑉𝑉 to achieve a better correlation between 𝐸𝐸 𝑉𝑉𝑉𝑉𝑉𝑉 and asphalt density.…”

“…This is because 𝐶𝐶𝐶𝐶𝐶𝐶 and 𝐶𝐶𝐶𝐶𝐶𝐶 are approximately proportional when the sub-harmonic components are not present in the vertical acceleration of the roller drum. However, the presence of these sub-harmonic components in the vertical acceleration of the drum [which indicates the occurrence of double jump (Sivagnanasuntharam et al, 2021)] is evident during pre-mapping, as shown in Fig. 16.…”