The First RILEM International Conference on Earthen Construction (ICEC 2022), hosted by the Université Gustave Eiffel in March 2022, demonstrated the depth and volume of research applicable to and supporting the use of earth as a construction material. Approximately two hundred researchers, academics, and engineers attended that event to share their knowledge and to learn from like-minded professionals engaged in objective, scientific research into the performance and real construction potential of these materials. The Second RILEM ICEC will build upon that success to provide a forum to present work on a wide range of topics related to earthen construction. The conference aims to grow and broaden the global network of earthen construction researchers, to attract new members to the RILEM technical committees on earth, and to identify opportunities for future research.