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Preparation and hydration mechanism of low shrinkage railway sleeper concrete containing hot steaming steel slag

The cascade grinding technology was used to product cementitious materials with hot steaming steel slag (SS), iron ore tailings (IOT), granulated blast furnace slag (GBFS), cement clinker (CC) and flue gas desulfurization gypsum (FGDG). The effect of SS on the mechanical properties and autogenous sh...

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Main Authors: Xiaoping Tian, Yongchao Zheng, Changlong Wang, Hidayati Asrah, Xiaowei Cui
Format: Article
Language:English
English
Published: Ecole Polytechnique de Montreal 2019
Subjects:
TF200-320 Railway construction
Online Access:https://eprints.ums.edu.my/id/eprint/30915/1/Preparation%20and%20hydration%20mechanism%20of%20low%20shrinkage%20railway%20sleeper%20concrete%20containing%20hot%20steaming%20steel%20slag.pdf
https://eprints.ums.edu.my/id/eprint/30915/2/Preparation%20and%20hydration%20mechanism%20of%20low%20shrinkage%20railway%20sleeper%20concrete%20containing%20hot%20steaming%20steel%20slag_ABSTRACT.pdf
https://eprints.ums.edu.my/id/eprint/30915/
https://www.iieta.org/journals/jnmes/paper/10.14447/jnmes.v22i2.a09
https://doi.org/10.14447/jnmes.v22i2.a09
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spelling my.ums.eprints.309152021-10-29T06:33:21Z https://eprints.ums.edu.my/id/eprint/30915/ Preparation and hydration mechanism of low shrinkage railway sleeper concrete containing hot steaming steel slag Xiaoping Tian Yongchao Zheng Changlong Wang Hidayati Asrah Xiaowei Cui TF200-320 Railway construction The cascade grinding technology was used to product cementitious materials with hot steaming steel slag (SS), iron ore tailings (IOT), granulated blast furnace slag (GBFS), cement clinker (CC) and flue gas desulfurization gypsum (FGDG). The effect of SS on the mechanical properties and autogenous shrinkage of railway sleeper concrete and the mechanism of SS inhibiting the autogenous shrinkage of railway sleeper concrete were studied by means of X-ray diffraction (XRD), flourier transform-infrared spectroscopy (FT-IR), and scanning electron microscope (SEM). The results show that the compressive strength of IOT railway sleeper concrete mixed with SS (SIRSC) is lower than that of IOT railway sleeper concrete unmixed with SS (UIRSC) at the same age. However autogenous shrinkage of SIRSC is significantly lower than that of UIRSC, autogenous shrinkage value of SIRSC at 28 d was 230×10-6, while that of UIRSC was 593×10-6. The hydration mechanism analysis shows that the hydration expansion of a small amount of inert f-CaO and f-MgO phase contained in the SS is the main expansion source to restrain the autogenous shrinkage of SIRSC. The f-CaO and f-MgO phases are highly dispersed after superfine grinding SS is mixed with concrete. In the middle and later stage of concrete hardening, the synergistic growth of ettringite (AFt) and C-S-H gels inhibits the autogenous shrinkage of SIRSC and improves the mechanical properties. Ecole Polytechnique de Montreal 2019 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/30915/1/Preparation%20and%20hydration%20mechanism%20of%20low%20shrinkage%20railway%20sleeper%20concrete%20containing%20hot%20steaming%20steel%20slag.pdf text en https://eprints.ums.edu.my/id/eprint/30915/2/Preparation%20and%20hydration%20mechanism%20of%20low%20shrinkage%20railway%20sleeper%20concrete%20containing%20hot%20steaming%20steel%20slag_ABSTRACT.pdf Xiaoping Tian and Yongchao Zheng and Changlong Wang and Hidayati Asrah and Xiaowei Cui (2019) Preparation and hydration mechanism of low shrinkage railway sleeper concrete containing hot steaming steel slag. Journal of New Materials for Electrochemical Systems, 22. pp. 112-118. ISSN 1480-2422 https://www.iieta.org/journals/jnmes/paper/10.14447/jnmes.v22i2.a09 https://doi.org/10.14447/jnmes.v22i2.a09
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
English
topic TF200-320 Railway construction
spellingShingle TF200-320 Railway construction
Xiaoping Tian
Yongchao Zheng
Changlong Wang
Hidayati Asrah
Xiaowei Cui
Preparation and hydration mechanism of low shrinkage railway sleeper concrete containing hot steaming steel slag
description The cascade grinding technology was used to product cementitious materials with hot steaming steel slag (SS), iron ore tailings (IOT), granulated blast furnace slag (GBFS), cement clinker (CC) and flue gas desulfurization gypsum (FGDG). The effect of SS on the mechanical properties and autogenous shrinkage of railway sleeper concrete and the mechanism of SS inhibiting the autogenous shrinkage of railway sleeper concrete were studied by means of X-ray diffraction (XRD), flourier transform-infrared spectroscopy (FT-IR), and scanning electron microscope (SEM). The results show that the compressive strength of IOT railway sleeper concrete mixed with SS (SIRSC) is lower than that of IOT railway sleeper concrete unmixed with SS (UIRSC) at the same age. However autogenous shrinkage of SIRSC is significantly lower than that of UIRSC, autogenous shrinkage value of SIRSC at 28 d was 230×10-6, while that of UIRSC was 593×10-6. The hydration mechanism analysis shows that the hydration expansion of a small amount of inert f-CaO and f-MgO phase contained in the SS is the main expansion source to restrain the autogenous shrinkage of SIRSC. The f-CaO and f-MgO phases are highly dispersed after superfine grinding SS is mixed with concrete. In the middle and later stage of concrete hardening, the synergistic growth of ettringite (AFt) and C-S-H gels inhibits the autogenous shrinkage of SIRSC and improves the mechanical properties.
format Article
author Xiaoping Tian
Yongchao Zheng
Changlong Wang
Hidayati Asrah
Xiaowei Cui
author_facet Xiaoping Tian
Yongchao Zheng
Changlong Wang
Hidayati Asrah
Xiaowei Cui
author_sort Xiaoping Tian
title Preparation and hydration mechanism of low shrinkage railway sleeper concrete containing hot steaming steel slag
title_short Preparation and hydration mechanism of low shrinkage railway sleeper concrete containing hot steaming steel slag
title_full Preparation and hydration mechanism of low shrinkage railway sleeper concrete containing hot steaming steel slag
title_fullStr Preparation and hydration mechanism of low shrinkage railway sleeper concrete containing hot steaming steel slag
title_full_unstemmed Preparation and hydration mechanism of low shrinkage railway sleeper concrete containing hot steaming steel slag
title_sort preparation and hydration mechanism of low shrinkage railway sleeper concrete containing hot steaming steel slag
publisher Ecole Polytechnique de Montreal
publishDate 2019
url https://eprints.ums.edu.my/id/eprint/30915/1/Preparation%20and%20hydration%20mechanism%20of%20low%20shrinkage%20railway%20sleeper%20concrete%20containing%20hot%20steaming%20steel%20slag.pdf
https://eprints.ums.edu.my/id/eprint/30915/2/Preparation%20and%20hydration%20mechanism%20of%20low%20shrinkage%20railway%20sleeper%20concrete%20containing%20hot%20steaming%20steel%20slag_ABSTRACT.pdf
https://eprints.ums.edu.my/id/eprint/30915/
https://www.iieta.org/journals/jnmes/paper/10.14447/jnmes.v22i2.a09
https://doi.org/10.14447/jnmes.v22i2.a09
_version_ 1760230825107914752
score 13.211869

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