Presentation Type

Poster

Start Date

4-5-2022 11:00 AM

End Date

4-5-2022 1:00 PM

Subjects

Hempcrete, Green Building, Sustainability, Economics, Hemp

Advisor

Sahan Dissanayake

Student Level

Post Baccalaureate

Abstract

It is critical to reduce greenhouse gas from the atmosphere to reduce the impacts of climate change. Oregon’s Climate Action Plan has established goals to reduce emissions by developing ‘Clean Buildings’ and increasing the CO2 sequestered by the state's ‘Natural and Working Lands’. Carbon negative construction materials like hemp-lime insulation could contribute to both goals.

Hemp-lime is a non-structural insulation material made from crushed hemp hurd, a lime-based binder, and water. It is non-toxic and versatile alternative to traditional insulation materials. Hemp-lime was submitted to be added to the International Residential Codes (IRC) index in 2022. IRC approval would establish the national set of standards necessary for widespread application.

Oregon’s hemp-lime industry is in early growth stages and this research demonstrates the variables that will impact CO2 emissions throughout the production process. Scenarios were modeled in excel using CO2 calculations completed for this study or collected from existing literature. The results indicate that there are scenarios where hemp-lime is CO2 positive material, specifically when travel distance is high. Decentralizing processing to compress the supply chain should be considered to reduce travel distance.

Persistent Identifier

https://archives.pdx.edu/ds/psu/37517

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May 4th, 11:00 AM May 4th, 1:00 PM

Hemp-lime Insulation: A Climate Friendly Building Material

It is critical to reduce greenhouse gas from the atmosphere to reduce the impacts of climate change. Oregon’s Climate Action Plan has established goals to reduce emissions by developing ‘Clean Buildings’ and increasing the CO2 sequestered by the state's ‘Natural and Working Lands’. Carbon negative construction materials like hemp-lime insulation could contribute to both goals.

Hemp-lime is a non-structural insulation material made from crushed hemp hurd, a lime-based binder, and water. It is non-toxic and versatile alternative to traditional insulation materials. Hemp-lime was submitted to be added to the International Residential Codes (IRC) index in 2022. IRC approval would establish the national set of standards necessary for widespread application.

Oregon’s hemp-lime industry is in early growth stages and this research demonstrates the variables that will impact CO2 emissions throughout the production process. Scenarios were modeled in excel using CO2 calculations completed for this study or collected from existing literature. The results indicate that there are scenarios where hemp-lime is CO2 positive material, specifically when travel distance is high. Decentralizing processing to compress the supply chain should be considered to reduce travel distance.