Making concrete a temperature sensor

Thermoelectric behavior refers to the generation of a voltage due to a temperature differential. This has been observed in cementitious materials. This characteristic is useful in cement-based structures as the structure can monitor its own temperature in the event of building fires. However, the ce...

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Main Author: Chu, Fiona
Other Authors: Yang En-Hua
Format: Final Year Project
Language:English
Published: 2017
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Online Access:http://hdl.handle.net/10356/73022
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-730222023-03-03T17:27:33Z Making concrete a temperature sensor Chu, Fiona Yang En-Hua School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering Thermoelectric behavior refers to the generation of a voltage due to a temperature differential. This has been observed in cementitious materials. This characteristic is useful in cement-based structures as the structure can monitor its own temperature in the event of building fires. However, the cementitious material is vulnerable to fire as it losses its strength under heat and risks spalling. An alternative construction material known as geopolymer has been developed with better fire resistance traits compared to concrete. The thermoelectric behavior of geopolymer has not been investigated so far. Therefore, focus of this study is to discover of the thermoelectric behavior of geopolymer by doing a comparison to strain hardening cementitious composites (SHCC) and cement paste. Additionally, experimental set-ups have been explored to improve the accuracy of voltage and temperature measurements. From the test, it can be observed that the heating and cooling curve of geopolymer displays good linearity and reversibility. High Seebeck has been also discovered in geopolymer when compared to cement paste. Geopolymer has a Seebeck coefficient of 5810 times than plain cement paste, 2540 times than SHCC, 1400 times than carbon fiber reinforced concrete and 30 times than steel fiber reinforced concrete. This shows that geopolymer is a good electron conductor, but a poor thermal conductor. Bachelor of Engineering (Civil) 2017-12-21T07:40:23Z 2017-12-21T07:40:23Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/73022 en Nanyang Technological University 46 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering
spellingShingle DRNTU::Engineering::Civil engineering
Chu, Fiona
Making concrete a temperature sensor
description Thermoelectric behavior refers to the generation of a voltage due to a temperature differential. This has been observed in cementitious materials. This characteristic is useful in cement-based structures as the structure can monitor its own temperature in the event of building fires. However, the cementitious material is vulnerable to fire as it losses its strength under heat and risks spalling. An alternative construction material known as geopolymer has been developed with better fire resistance traits compared to concrete. The thermoelectric behavior of geopolymer has not been investigated so far. Therefore, focus of this study is to discover of the thermoelectric behavior of geopolymer by doing a comparison to strain hardening cementitious composites (SHCC) and cement paste. Additionally, experimental set-ups have been explored to improve the accuracy of voltage and temperature measurements. From the test, it can be observed that the heating and cooling curve of geopolymer displays good linearity and reversibility. High Seebeck has been also discovered in geopolymer when compared to cement paste. Geopolymer has a Seebeck coefficient of 5810 times than plain cement paste, 2540 times than SHCC, 1400 times than carbon fiber reinforced concrete and 30 times than steel fiber reinforced concrete. This shows that geopolymer is a good electron conductor, but a poor thermal conductor.
author2 Yang En-Hua
author_facet Yang En-Hua
Chu, Fiona
format Final Year Project
author Chu, Fiona
author_sort Chu, Fiona
title Making concrete a temperature sensor
title_short Making concrete a temperature sensor
title_full Making concrete a temperature sensor
title_fullStr Making concrete a temperature sensor
title_full_unstemmed Making concrete a temperature sensor
title_sort making concrete a temperature sensor
publishDate 2017
url http://hdl.handle.net/10356/73022
_version_ 1759855191215046656