All sorts of innovations using hemp are appearing every day, but none more so than in the area of building materials. They're not always easy to find, but a few products already available include hemp insulation, acoustic panels, flooring, particle board, and even hemp "lumber." But, the material that is grabbing most of the headlines is hempcrete, and with good reason.
S.R. Karade, senior principal scientist of the Central Building Research Institute in Roorkee, India, outside New Delhi, has been studying hempcrete and wrote in a recent paper for the Journal of Cleaner Production about how hempcrete performs as a building material in terms of insulation, durability, structural strength and acoustic control, among other criteria. Overall, Karade found, hempcrete meets the current standards of most building applications and in many cases outperforms materials currently used, particularly for insulation.
Related: Learn About Hempcrete In Free Webinar
Hempcrete is not a direct replacement of concrete, Karade cautions. In the lab he’s been able to make hempcrete with a compressive strength of 3 megapascals (MPa). “Typical concrete blocks, used for making walls, have compressive strength values varying between 5 MPa and 20 MPa,” he wrote in an email. “Due to its poor mechanical strength, it cannot be sufficiently relied upon to undertake any structural loads. However, considering its impressive functional properties, in terms of thermal resistance and [moisture-absorbing] behavior, hemp concrete may be at the top spot in the list of walling materials in the future.”
Read the full article at www.resilience.org