# Experimental Study of the Dynamic Characteristics of PVA-Amended Expansive Soils
## 4 Conclusions
**Nomenclature**  
\(\rho_{\rm{dmax}}\) & maximum dry density  
\(F_{\rm{s}}\) & free inflation rate  
\(\eta\) & viscosity  
\(D\) & alcoholysis  
\(W\) & optimum moisture content  
\(W_{\rm{L}}\) & liquid limit  
\(W_{\rm{P}}\) & plastic limit  
\(V\) & volatile matter  
\(AR\) & purity  
\(E_{\rm{d}}\) & elastic modulus  
\(C_{\rm{u}}\) & coefficient of curvature  
\(\sigma\) & normal stress  
\(\tau\) & shear stress  
\(c\) & cohesive force  
\(\varphi\) & friction angle  
\(\sigma_{\rm{d}}\) & dynamic stress  
\(\eta_{\rm{d}}\) & fitted parameter  
\(\lambda\) & damping ratio  
\(E_{0}\) & initial dynamic modulus of elasticity  
\(Ash\) & ash  
\(\sigma_{3}\) & confining pressure  
\(\epsilon_{\rm{d}}\) & dynamic strain  
\(f\) & frequency  
\({\rm{G_{s}}}\) & relative density of soil particles  
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