Dr. Xiong Zhang, Professor in Geotechnical Engineering at Missouri S&T, was invited to give a keynote speech on “Recent Advances in Measuring Volume Changes of Unsaturated Soil Specimen During Triaxial Testing” at 3rd Pan-American Conference on Unsaturated Soils – Pan-American Conference on Unsaturated Soils, which was held in the city of Rio de Janeiro, Brazil, July 25-28, 2021. The conference dealt with advances in unsaturated soil mechanics and discuss current and future trends in practical applications.