Ecocement for beach erosion control

Beach erosion happens when there is a net loss of sand at beaches and at coastlines. Such erosion has been accelerating in recent years due to sea level rise and human activities. Current solutions to overcome beach erosion includes hard and soft solutions. Hard solutions have negative effects...

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Main Author: Chua, Xue Ning
Other Authors: Chu Jian
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2022
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Online Access:https://hdl.handle.net/10356/157547
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1575472022-05-19T12:50:14Z Ecocement for beach erosion control Chua, Xue Ning Chu Jian School of Civil and Environmental Engineering CJCHU@ntu.edu.sg Engineering::Civil engineering::Geotechnical Beach erosion happens when there is a net loss of sand at beaches and at coastlines. Such erosion has been accelerating in recent years due to sea level rise and human activities. Current solutions to overcome beach erosion includes hard and soft solutions. Hard solutions have negative effects on the environment while soft solutions mainly work well as temporary measures. Therefore, a new approach, Ecocement, was proposed and investigated in this project. Experimental studies were carried out to test the feasibility and effectiveness of using Ecocement on beach sand to control beach erosion. Ecocement is the product of a bio-cementation process. It is based on the microbially induced carbonate precipitation (MICP) process which uses microbes to catalyse biochemical reactions to produce calcium carbonate precipitates as binding agent for sand particles. In this project, soybean was used as an alternative to produce catalyst enzymes for the enzyme induced carbonate precipitation (EICP) process. Besides eliminating biosafety concern, soybean enzyme is cost-effective to be used for Ecocement. It also reduces carbon footprint by using sustainable raw materials and simplified extraction methods. Laboratory tests and on-site tests were carried out to assess the mechanical properties of the treated beach sand. Unconfined compression (UC) tests were used to measure the shear strength of the treated sand in laboratory. Penetration tests using a pocket penetrometer were used to test the strength of the treated sand slope on-site. The effectiveness of Ecocement treatment was also represented through the measurement of cumulative calcium consumption and final calcium carbonate content. The experiment results had shown that EICP is feasible in cementation of the beach sand, thus reducing sediment transportation, and controlling erosion. Bachelor of Engineering (Civil) 2022-05-19T12:50:13Z 2022-05-19T12:50:13Z 2022 Final Year Project (FYP) Chua, X. N. (2022). Ecocement for beach erosion control. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/157547 https://hdl.handle.net/10356/157547 en GE-01 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering::Geotechnical
spellingShingle Engineering::Civil engineering::Geotechnical
Chua, Xue Ning
Ecocement for beach erosion control
description Beach erosion happens when there is a net loss of sand at beaches and at coastlines. Such erosion has been accelerating in recent years due to sea level rise and human activities. Current solutions to overcome beach erosion includes hard and soft solutions. Hard solutions have negative effects on the environment while soft solutions mainly work well as temporary measures. Therefore, a new approach, Ecocement, was proposed and investigated in this project. Experimental studies were carried out to test the feasibility and effectiveness of using Ecocement on beach sand to control beach erosion. Ecocement is the product of a bio-cementation process. It is based on the microbially induced carbonate precipitation (MICP) process which uses microbes to catalyse biochemical reactions to produce calcium carbonate precipitates as binding agent for sand particles. In this project, soybean was used as an alternative to produce catalyst enzymes for the enzyme induced carbonate precipitation (EICP) process. Besides eliminating biosafety concern, soybean enzyme is cost-effective to be used for Ecocement. It also reduces carbon footprint by using sustainable raw materials and simplified extraction methods. Laboratory tests and on-site tests were carried out to assess the mechanical properties of the treated beach sand. Unconfined compression (UC) tests were used to measure the shear strength of the treated sand in laboratory. Penetration tests using a pocket penetrometer were used to test the strength of the treated sand slope on-site. The effectiveness of Ecocement treatment was also represented through the measurement of cumulative calcium consumption and final calcium carbonate content. The experiment results had shown that EICP is feasible in cementation of the beach sand, thus reducing sediment transportation, and controlling erosion.
author2 Chu Jian
author_facet Chu Jian
Chua, Xue Ning
format Final Year Project
author Chua, Xue Ning
author_sort Chua, Xue Ning
title Ecocement for beach erosion control
title_short Ecocement for beach erosion control
title_full Ecocement for beach erosion control
title_fullStr Ecocement for beach erosion control
title_full_unstemmed Ecocement for beach erosion control
title_sort ecocement for beach erosion control
publisher Nanyang Technological University
publishDate 2022
url https://hdl.handle.net/10356/157547
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