(3) Higher cement content, longer curing–soaking time and higher degree of compaction
yield significant amount of improvement of unconfined compressive
strength, stiffness (stress–strain curves) and durability.
(4) The strong influence of cement bonding appears at 8% cement contact. This
threshold cement content revealed a strong increase in strength and durability
either in active bentonite or in kaolin mixtures.
(5) The final water content strongly influences the strength and durability. The higher
the value of final water content, the lower the values of strength and durability.
(6) The curing–soaking conditions influence the intrusion of water content in specimens
and the stress–strain curves. The defined areas (A) and (B) in stress–strain
diagrams correspond to the attractive and repulsive forces, respectively, during
the soaking process.
(7) Specifications of allowable limits of strength reduction (20%) due to soaking
effects and the ultimate strength value (1754 kN/m2) classify the stabilized clayey
mixtures as durable and non durable, and define areas of strength and durability
for successful cement stabilization.