PanAm-UNSAT 2013 – Cartagena, Colombia

The First Pan-American Conference on Unsaturated Soils (Pan-Am UNSAT 2013) was held in Cartagena de Indias, Colombia, from February 20th to 22th, 2013.

Conference theme: Advances in Unsaturated Soils


  • Chair: Bernardo Caicedo
  • Co-Chairs: Carol Murillo, Julio Esteban Colmenares and Ivan Rafael Berdugo


  • 126 attendees (17 countries represented)
  • 134 abstracts received (from 24 countries)
  • 83 peer-reviewed papers published

Program Issues:

  • 7 Key note Lectures


  • Publisher: CRC Press – Taylor & Francis Group, London, ISBN: 978-041562095-6
  • Editors: Bernardo Caicedo, Carol Murillo, Laureano Hoyos, Julio E. Colmenares & Iván R. Berdugo

PanAm-UNSAT 2017 – Dallas, Texas – USA

The Second Pan American Conference on Unsaturated Soils (PanAm-UNSAT 2017) was held in Dallas, Texas, USA, from November 12th to 15th, 2017, as a specialty conference of the Geo-Institute/ASCE.

Conference theme: Unsaturated Soil Mechanics for Sustainable Geotechnics.


  • Conference co-chairs: Laureano Hoyos and John McCartney.
  • Technical Program co-chairs: Sandra Houston and William Likos.
  • Local co-chairs: Marcelo Sanchez and Gerald Miller.
  • Logistics coordinator: Majid Ghayoomi.
  • Sponsorships/exhibits chair: Anand Puppala.


  • 230 attendees (24% students, 20 countries represented, 75/25 male/female ratio), and 12 exhibitors/sponsors.
  • 318 abstracts received and 294 abstracts approved for draft submission.
  • 147 peer-reviewed papers published in four GSP volumes.

Program Issues:

  • First Distinguished Pan American Lecture (Sandra Houston).
  • 4 Keynote Lectures, 2 Fredlund Symposium plenary sessions, 6 State-of-the-Art /State-of-the-Practice plenary lectures, 3 Panel Sessions, 27 concurrent technical sessions.
  • Pre-conference short course on “Heave, Settlement and Lateral Expansion of Unsaturated Compacted Fills” by Iraj Noorany and Christine Detournay.
  • Pre-conference short course on “Simple Methods to Characterize and Model Unsaturated Soil Behavior” by Xiong Zhang, Laureano Hoyos and Marcelo Sanchez.

GSP Publications (Editors: Laureano Hoyos, Sandra Houston, John McCartney & William Likos):

  • Geotechnical Special Pub. No. 300 (ASCE), “PanAm Unsaturated Soils 2017: Plenary Papers”, 365 pp.
  • Geotechnical Special Pub. No. 301 (ASCE), “PanAm Unsaturated Soils 2017: Fundamentals”, 603 pp.
  • Geotechnical Special Pub. No. 302 (ASCE), “PanAm Unsaturated Soils 2017: Applications”, 426 pp.
  • Geotechnical Special Pub. No. 303 (ASCE), “PanAm Unsaturated Soils 2017: Swell-Shrink and Tropical Soils”, 460 pp.