Promoting Hemp and Lime Construction for Sustainable Buildings

A Sustainable and Healthy Environment: Promoting Hemp and Lime Construction A presentation to

U.S. Heritage Group ,[object Object]

Brief History of Lime Construction ,[object Object],[object Object],[object Object],[object Object]

Building with Lime ,[object Object]

Environmental Impact of Lime-Based Mortar versus Cement-Based Mortar Building Research Establishment, Ltd. (BRE)

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What is Hempcrete? ,[object Object],[object Object],[object Object],Quicklime converted to dry hydrate. The fibrous stalk of the industrial hemp plant.

The History of Hempcrete ,[object Object]

What is Industrial Hemp? ,[object Object],[object Object],[object Object],Photos from the Hemp Sys project in Italy.

Processing Hemp for Hempcrete The stem tissues outside the vascular cambium are referred to as the bast (flexible inner phloem fibers of the bark) and contain the fibers useful for textiles. The tissues inside the vascular cambium (inner woody core) contain the pith and the xylem vessels and are referred to as the hurd. Transverse section through the stem of an industrial hemp plant

Processing the Hemp for Hempcrete The hurd, also known as a shiv, is separated from the softer fibers that surround it. The hurd is then chopped, graded, and all dust is removed. At this point the hemp hurd is ready for use with lime.

[object Object],[object Object],[object Object],www.greenspec.co.uk

Advantages of Hemp and Lime Construction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The combination of these thermal properties creates buildings that are cool in the summer, warm in the winter, and that maintain comfortable air quality due to the breathability of Hemcrete.

More Advantages—Buildings and Health ,[object Object],Environmental Protection Agency

Sick Building Syndrome ,[object Object],[object Object],[object Object],[object Object],[object Object],Symptoms and Illnesses Associated with Poor Indoor Air Quality Encyclopedia of Occupational Health and Safety, 4 th ed.

Lime and Hemp Construction in the United Kingdom Townhouses, Haverhill Suffolk, England. Centre for Alternative Technology Machynlleth, Wales ,[object Object]

Industrial Hemp in the United States ,[object Object],[object Object],[object Object]

History of Hempcrete in the United States ,[object Object],[object Object],Community leader Joe American Horse of the Oglala Sioux Pine Ridge Reservation, South Dakota Beginning in 1998, the Oglala Sioux of the impoverished Pine Ridge Reservation in South Dakota have grew industrial hemp for use in the production of hempcrete. The hempcrete was used to build homes on the reservation, thereby minimizing the severe housing shortage suffered by the tribe and providing employment for members of the community. Hemp production took place under tribal sovereignty laws. Recently, the DEA, and eventually the U.S. Court of Appeals, denied their ability to do so.

A Partnership for Health and Sustainability ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Promoting Hemp and Lime Construction for Sustainable Buildings

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