Knowledge mapping for advancement of hemp-lime composite in the construction industry: a systematic literature review (from 2004 to 2024)

Hemp-lime (HL) construction is a rapidly evolving field in biomaterials. This study systematically investigates the intellectual landscape and advancements in HL research from 2000 to 2024, analyzing 309 studies using bibliometric and meta-analytical approaches in conjunction with a literature review. The analysis identifies trends, intellectual linkages, and research gaps within the HL construction domain. With a 19% annual growth rate since 2007 and 75% of publications emerging after 2015, the field demonstrates significant momentum, driven by global initiatives such as the Paris Climate Agreement. Six major research categories have been identified, with notable contributions from France and the UK, focusing on thermal, hygrothermal, and mechanical performance. The findings reveal a shift from foundational studies to application-oriented research; however, gaps persist in construction technologies, economic modeling, and social dimensions. Advanced manufacturing techniques, predictive modeling, and circular economy frameworks are essential for scaling HL adoption. Unlike conventional reviews focused on technical synthesis, this study prioritizes mapping the field’s intellectual structure and development to reveal research patterns and guide future inquiry.