Evidence of stabilised peat as a net carbon sink
Duggan, Alan R.
McCabe, Bryan A.
MetadataShow full item record
This item's downloads: 25 (view details)
Duggan, Alan R., McCabe, Bryan A., Goggins, Jamie, & Clifford, Eoghan. (2019). Evidence of Stabilized Peat as a Net Carbon Sink. Journal of Materials in Civil Engineering, 31(3), 04019005. doi:10.1061/(ASCE)MT.1943-5533.0002605
Mass stabilization, a ground improvement solution used for construction in peatlands, involves mixing suitable dry binders into the peat, increasing strength and stiffness and reducing permeability. A previous pilot study of the carbonation process in stabilized peat showed that it could be a net sink of CO2, because the binder takes in CO2 from the atmosphere and any CO2 released by oxidized peat due to carbonation. In this study, a closed-chamber method was applied to stabilised peat specimens over a 6 month period to assess the factors affecting CO2 intake rate. The studies revealed that an increase in cement content and a larger surcharge contributed to a larger CO2 intake rate. These rates decreased logarithmically with time, and surcharge was found to be less influential over time. The CO2 intake rate reduced when the atmospheric CO2 concentration reduced, and the replacement of cement with ground granulated blast-furnace slag had a negative effect on the CO2 intake rate due to its lower carbonation potential. Furthermore, a high water table resulted in a decrease in the CO2 intake rate. These laboratory results have highlighted that dry soil mixing has a minimal on-site impact in environmental terms, allowing geotechnical engineers to make more informed decisions on the suitability of this technique for construction projects.
This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. Please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Carbon costs and savings of Greenways: creating a balance sheet for the sustainable design and construction of cycling routes Manton, Richard; Duggan, Alan; Goggins, Jamie; Clifford, Eoghan (Inderscience, 2013-09-10)A modal shift to cycling has the potential to reduce carbon emissions in the transport sector. However, the carbon footprint of constructing new cycling routes, particularly greenways, has not been previously considered ...
Saturating light and not increased carbon dioxide under ocean acidification drives photosynthesis and growth inulva rigida(chlorophyta) Rautenberger, Ralf; Fernández, Pamela A.; Strittmatter, Martina; Heesch, Svenja; Cornwall, Christopher E.; Hurd, Catriona L.; Roleda, Michael Y. (Wiley-Blackwell, 2015-01-25)Carbon physiology of a genetically identified Ulva rigida was investigated under different CO2(aq) and light levels. The study was designed to answer whether (1) light or exogenous inorganic carbon (Ci) pool is driving ...
Use of zeolite with alum and polyaluminum chloride amendments to mitigate runoff losses of phosphorus, nitrogen, and suspended solids from agricultural wastes applied to grassed soils Murnane, J. G.; Brennan, R. B.; Fenton, O.; Healy, Mark G. (Crop Science Society of America, 2015-09-16)Carbon (C) losses from agricultural soils to surface waters can migrate through water treatment plants and result in the formation of disinfection by-products (DBP), which are potentially harmful to human health. This study ...