TY - GEN
T1 - Fine-grained mixtures
T2 - GeoCongress 2008: Characterization, Monitoring, and Modeling of GeoSystems
AU - Palomino, Angelica M.
AU - Santamarina, J. C.
PY - 2008
Y1 - 2008
N2 - Fabric formation in fine-grained particulate materials depends on pore fluid characteristics and the mineral and geometric characteristics of particles. The behavior of both individual mineral systems and mineral mixtures is studied through macroscale tests involving a wide range of solid volume fractions and strain levels. Results show that (1) a clear fabric map develops on the pH-ionic concentration space for single mineral systems, (2) Coulombic attraction between oppositely charged mineral particles in kaolinite-calcium carbonate mixtures heavily influences particle associations at low solids content, (3) the influence of an anionic polymer on single or mixed mineral systems is surface-charge dependent, (4) the response can be further modified by adding divalent cations to affect the cation-to-polymer ratio and control the level of particle associations within single and mixed mineral systems treated with polymers. These results are relevant to many natural soil environments and the possible development of engineered mineral mixtures for industrial applications. Copyright ASCE 2008.
AB - Fabric formation in fine-grained particulate materials depends on pore fluid characteristics and the mineral and geometric characteristics of particles. The behavior of both individual mineral systems and mineral mixtures is studied through macroscale tests involving a wide range of solid volume fractions and strain levels. Results show that (1) a clear fabric map develops on the pH-ionic concentration space for single mineral systems, (2) Coulombic attraction between oppositely charged mineral particles in kaolinite-calcium carbonate mixtures heavily influences particle associations at low solids content, (3) the influence of an anionic polymer on single or mixed mineral systems is surface-charge dependent, (4) the response can be further modified by adding divalent cations to affect the cation-to-polymer ratio and control the level of particle associations within single and mixed mineral systems treated with polymers. These results are relevant to many natural soil environments and the possible development of engineered mineral mixtures for industrial applications. Copyright ASCE 2008.
UR - http://www.scopus.com/inward/record.url?scp=66449083347&partnerID=8YFLogxK
U2 - 10.1061/40972(311)29
DO - 10.1061/40972(311)29
M3 - Conference contribution
AN - SCOPUS:66449083347
SN - 9780784409725
T3 - Geotechnical Special Publication
SP - 229
EP - 236
BT - Proceedings of Sessions of GeoCongress 2008 - GeoCongress 2008
Y2 - 9 March 2008 through 12 March 2008
ER -