Enhancement of carbon sequestration of MgO-based concrete

In a highly populated country in Singapore, it is inevitable to find buildings constructed using concrete thus we cannot ignore the environmental impacts that results from the manufacturing of cement to produce concrete. One of the environmental issues that arises from the manufacturing of cement i...

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Main Author: Yeo, Hui Xian
Other Authors: Qian Shunzhi
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2021
Subjects:
Online Access:https://hdl.handle.net/10356/150716
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1507162021-05-30T06:17:02Z Enhancement of carbon sequestration of MgO-based concrete Yeo, Hui Xian Qian Shunzhi School of Civil and Environmental Engineering SZQian@ntu.edu.sg Engineering::Civil engineering In a highly populated country in Singapore, it is inevitable to find buildings constructed using concrete thus we cannot ignore the environmental impacts that results from the manufacturing of cement to produce concrete. One of the environmental issues that arises from the manufacturing of cement is the carbon dioxide (CO2) gas into the atmosphere which causes global warming and increased occurrence of flooding. Among the possible alternative binders to Ordinary Portland Cement (OPC), reactive magnesium oxide (MgO) cement is considered more sustainable since it results in lesser net CO2 emissions. In this project, the aim is to reduce CO2 emissions through the enhancement of carbonation in MgO based cement. This will be carried out using microbial methods and the design of MgO-based pervious concrete. For microbial approach, the effect of the carbonic anhydrase (CA)-producing bacterial on the mechanical performance and carbon sequestration of MgO-based concrete was investigated. It was found that CA-producing bacteria led to the highest percentage increase in compressive strength and carbon sequestration at 89.8% and 84%, respectively. Furthermore, the MgO-based pervious concrete with different void ratios was studied. Samples with a void ratio of 0.25 showed a 7-day compressive strength of 26.3 MPa, which meets its functionality. Moreover, wet/dry cycles had a positive effect on the strength gain and carbon sequestration in MgO-based pervious concrete. Bachelor of Engineering (Civil) 2021-05-28T00:34:51Z 2021-05-28T00:34:51Z 2021 Final Year Project (FYP) Yeo, H. X. (2021). Enhancement of carbon sequestration of MgO-based concrete. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/150716 https://hdl.handle.net/10356/150716 en 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
spellingShingle Engineering::Civil engineering
Yeo, Hui Xian
Enhancement of carbon sequestration of MgO-based concrete
description In a highly populated country in Singapore, it is inevitable to find buildings constructed using concrete thus we cannot ignore the environmental impacts that results from the manufacturing of cement to produce concrete. One of the environmental issues that arises from the manufacturing of cement is the carbon dioxide (CO2) gas into the atmosphere which causes global warming and increased occurrence of flooding. Among the possible alternative binders to Ordinary Portland Cement (OPC), reactive magnesium oxide (MgO) cement is considered more sustainable since it results in lesser net CO2 emissions. In this project, the aim is to reduce CO2 emissions through the enhancement of carbonation in MgO based cement. This will be carried out using microbial methods and the design of MgO-based pervious concrete. For microbial approach, the effect of the carbonic anhydrase (CA)-producing bacterial on the mechanical performance and carbon sequestration of MgO-based concrete was investigated. It was found that CA-producing bacteria led to the highest percentage increase in compressive strength and carbon sequestration at 89.8% and 84%, respectively. Furthermore, the MgO-based pervious concrete with different void ratios was studied. Samples with a void ratio of 0.25 showed a 7-day compressive strength of 26.3 MPa, which meets its functionality. Moreover, wet/dry cycles had a positive effect on the strength gain and carbon sequestration in MgO-based pervious concrete.
author2 Qian Shunzhi
author_facet Qian Shunzhi
Yeo, Hui Xian
format Final Year Project
author Yeo, Hui Xian
author_sort Yeo, Hui Xian
title Enhancement of carbon sequestration of MgO-based concrete
title_short Enhancement of carbon sequestration of MgO-based concrete
title_full Enhancement of carbon sequestration of MgO-based concrete
title_fullStr Enhancement of carbon sequestration of MgO-based concrete
title_full_unstemmed Enhancement of carbon sequestration of MgO-based concrete
title_sort enhancement of carbon sequestration of mgo-based concrete
publisher Nanyang Technological University
publishDate 2021
url https://hdl.handle.net/10356/150716
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