Quantifying and Optimizing Carbon Dioxide Sequestration in Hempcrete Using a Controlled Chamber

Authors: Jennifer Callan, Rachmadian Wulandana

SUNY Campus: SUNY New Paltz

Presentation Type: Poster

Location: UU 111

Presentation #: 63

Timeslot: Session D 3:00-4:00 PM

Abstract: Hempcrete, a bio-composite material composed of hemp hurd mixed with a lime-based binder and water, offers significant potential for carbon sequestration in construction materials. Hemp hurds possess a highly porous structure which enhances their ability to absorb liquids and gases. This sustainable material sequesters carbon dioxide through both the photosynthesis process during hemp growth (approximately 4.05-6.07 tons of CO₂ per acre during a 3-4 month cycle) and the carbonation of lime binder, where atmospheric CO₂ reacts with calcium hydroxide to form stable calcium carbonate. This research involves an experimental chamber design to quantify and optimize the CO₂ sequestration capacity of hempcrete under controlled conditions. The system consists of a static chamber - a pressurized glass vessel with an integrated Schrader valve, CO₂ and humidity sensors to monitor concentration and moisture changes during carbonation. This experimental setup enables systematic analysis of how varying pressure, humidity, and temperature conditions influence the rate and extent of CO₂ uptake in hempcrete samples. The findings will establish optimized parameters for CO₂ sequestration, providing valuable data that enhances hempcrete's carbon sequestration potential and advances its application in sustainable construction. Furthermore, this research contributes to the development of carbon-negative building materials that can help mitigate climate change.