A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Bonding degradation and stress-dilatancy response of weakly cemented sands
The progressive bond breakage of artificially cemented sands induced by shear straining was investigated through conventional isotropically consolidated drained triaxial compression tests. Sand specimens were prepared with a low degree of cementation by adopting a chemical grout. Test results were interpreted in terms of two stress-dilatancy theories for cohesive-frictional materials proposed in literature. The influence of debonding on the stress-dilatancy behaviour of cemented sands was analysed with particular emphasis on the 'delayed dilatancy' phenomenon. A bonding degradation curve was determined for each test relating the interparticle cohesion (c) to the magnitude of the total plastic strain vector (ε d ) and a bond degradation rate factor (D c ) was assessed from each curve. The maximum value of interparticle cohesion (c 0 ) before the onset of bond degradation under shearing was found to correspond with a sharp decrease in the soil stiffness of the specimens. The influence of the effective confining stress (p ′ c ) on both c 0 and D c parameters gathered from each test was also ascertained.
Bonding degradation and stress-dilatancy response of weakly cemented sands
The progressive bond breakage of artificially cemented sands induced by shear straining was investigated through conventional isotropically consolidated drained triaxial compression tests. Sand specimens were prepared with a low degree of cementation by adopting a chemical grout. Test results were interpreted in terms of two stress-dilatancy theories for cohesive-frictional materials proposed in literature. The influence of debonding on the stress-dilatancy behaviour of cemented sands was analysed with particular emphasis on the 'delayed dilatancy' phenomenon. A bonding degradation curve was determined for each test relating the interparticle cohesion (c) to the magnitude of the total plastic strain vector (ε d ) and a bond degradation rate factor (D c ) was assessed from each curve. The maximum value of interparticle cohesion (c 0 ) before the onset of bond degradation under shearing was found to correspond with a sharp decrease in the soil stiffness of the specimens. The influence of the effective confining stress (p ′ c ) on both c 0 and D c parameters gathered from each test was also ascertained.
Bonding degradation and stress-dilatancy response of weakly cemented sands
Porcino, Daniela D (author) / Marcianò, Vincenzo
2017
Article (Journal)
English
Bonding degradation and stress–dilatancy response of weakly cemented sands
| Taylor & Francis Verlag | 2017
A Stress-Dilatancy Relation for Cemented Sands
| British Library Conference Proceedings | 2009
Strength and Dilatancy of Sands
| NTIS | 1984