TY - GEN
T1 - Microbial induced calcite precipitation of dune sand using a surface spray technique
AU - Crowley, Raphael
AU - Davies, Matthew
AU - Ellis, Terri N.
AU - Hudyma, Nick
AU - Ammons, Paige
AU - Matemu, Christian
N1 - Publisher Copyright:
© 2019 American Society of Civil Engineers.
PY - 2019
Y1 - 2019
N2 - Hurricanes Irma and Matthew caused significant damage to the coastal dune systems in northeast Florida. Dunes are the first line of protection in storm events for the prevention of beach erosion and inland floods. It would be beneficial if a sustainable, rapidly-deployable strengthening mechanism could be used to fortify the dunes prior to hurricanes to help mitigate damage. One potential technology for dune protection is microbial induced calcite precipitation (MICP). Dune sand was collected from Neptune Beach, FL, and the feasibility of treating the sand using a surface-spray technique was investigated. Specifically, microbes, urea solution, and calcium chloride were applied to a bench-scale synthetic dune surfaces using a garden hose attachment. The treated dunes were allowed to cure for 48 hours. Results showed this application technique may provide erosion protection via three mechanisms. An erosion resistant crust formed along the outer surface of the dune; large blocks of cemented material are formed on the interior of the dune; and treatment appears to increase median grain size diameter. However, the increase in grain-size diameter may have a relatively small effect on erosion mitigation.
AB - Hurricanes Irma and Matthew caused significant damage to the coastal dune systems in northeast Florida. Dunes are the first line of protection in storm events for the prevention of beach erosion and inland floods. It would be beneficial if a sustainable, rapidly-deployable strengthening mechanism could be used to fortify the dunes prior to hurricanes to help mitigate damage. One potential technology for dune protection is microbial induced calcite precipitation (MICP). Dune sand was collected from Neptune Beach, FL, and the feasibility of treating the sand using a surface-spray technique was investigated. Specifically, microbes, urea solution, and calcium chloride were applied to a bench-scale synthetic dune surfaces using a garden hose attachment. The treated dunes were allowed to cure for 48 hours. Results showed this application technique may provide erosion protection via three mechanisms. An erosion resistant crust formed along the outer surface of the dune; large blocks of cemented material are formed on the interior of the dune; and treatment appears to increase median grain size diameter. However, the increase in grain-size diameter may have a relatively small effect on erosion mitigation.
UR - http://www.scopus.com/inward/record.url?scp=85063436492&partnerID=8YFLogxK
U2 - 10.1061/9780784482117.021
DO - 10.1061/9780784482117.021
M3 - Conference contribution
AN - SCOPUS:85063436492
SN - 9780784482117
T3 - Geotechnical Special Publication
SP - 213
EP - 222
BT - Geotechnical Special Publication
A2 - Meehan, Christopher L.
A2 - Kumar, Sanjeev
A2 - Pando, Miguel A.
A2 - Coe, Joseph T.
T2 - 8th International Conference on Case Histories in Geotechnical Engineering: Soil Improvement, Geo-Congress 2019
Y2 - 24 March 2019 through 27 March 2019
ER -