Experimental study on pore connectivity and its influence on chloride transport in saturated cementitious system

Yong Zhang; Guang Ye

Experimental study on pore connectivity and its influence on chloride transport in saturated cementitious system

Yong Zhang, Guang Ye

Materials and Environment

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific

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Abstract

The purpose of this paper is to investigate the pore connectivity and its influence on chloride transport property in cementitious materials under saturated condition. Mercury intrusion porosimetry experiment was carried out on a variety of hydrated cement pastes curing up to one year. By repeating pressurization-depressurization cycles, pore entrapment (namely ink-bottled effect) was expressed as a function of the equivalent diameter of penetrated throat neck pores. Accordingly, the small capillary pores that are present within patches of hydration products and the large capillary pores that are left out of hydration products were distinguished and their connections were ascertained, which provide evident basis for the study of transport property estimated by means of rapid chloride migration test on mortar samples. The results suggested that in hydrated cementitious system the capillary pore connections influencing mass transport should be mainly attributed to the connectivity of small capillary pores, whose relevance to chloride migration coefficient has also been testified by the well-fitted experimental plots in this study.

Original language	English
Title of host publication	Proceedings of the 3rd International RILEM Conferences on Microstructure Related Durability of Cementitious Composites
Subtitle of host publication	Nanjing, China
Editors	Changwen Miao, Wei Sun, Jiaping Liu, Huisu Chen, Guang Ye, Klaas van Breugel
Publisher	Rilem
Pages	1-8
Number of pages	8
Volume	117
ISBN (Electronic)	978-2-35158-189-6
ISBN (Print)	978-2-35158-188-9
Publication status	Published - 2016
Event	3rd International Conferences on Microstructure Related Durability of Cementitious Composites - Nanjing, China Duration: 24 Oct 2016 → 26 Oct 2016 Conference number: 3 http://www.microdurability2016.com/

Conference

Conference	3rd International Conferences on Microstructure Related Durability of Cementitious Composites
Abbreviated title	Microdurability 2016
Country/Territory	China
City	Nanjing
Period	24/10/16 → 26/10/16
Internet address	http://www.microdurability2016.com/

Keywords

cementitious system
Microstructure
pore connectivity
chloride transport

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Microdurability2016_Experimental study on pore connectivity and its influence on chloride transport in saturated cementitious systemAccepted author manuscript, 419 KB

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Zhang, Y., & Ye, G. (2016). Experimental study on pore connectivity and its influence on chloride transport in saturated cementitious system. In C. Miao, W. Sun, J. Liu, H. Chen, G. Ye, & K. van Breugel (Eds.), Proceedings of the 3rd International RILEM Conferences on Microstructure Related Durability of Cementitious Composites: Nanjing, China (Vol. 117, pp. 1-8). Rilem.

Zhang, Yong ; Ye, Guang. / Experimental study on pore connectivity and its influence on chloride transport in saturated cementitious system. Proceedings of the 3rd International RILEM Conferences on Microstructure Related Durability of Cementitious Composites: Nanjing, China. editor / Changwen Miao ; Wei Sun ; Jiaping Liu ; Huisu Chen ; Guang Ye ; Klaas van Breugel. Vol. 117 Rilem, 2016. pp. 1-8

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title = "Experimental study on pore connectivity and its influence on chloride transport in saturated cementitious system",

abstract = "The purpose of this paper is to investigate the pore connectivity and its influence on chloride transport property in cementitious materials under saturated condition. Mercury intrusion porosimetry experiment was carried out on a variety of hydrated cement pastes curing up to one year. By repeating pressurization-depressurization cycles, pore entrapment (namely ink-bottled effect) was expressed as a function of the equivalent diameter of penetrated throat neck pores. Accordingly, the small capillary pores that are present within patches of hydration products and the large capillary pores that are left out of hydration products were distinguished and their connections were ascertained, which provide evident basis for the study of transport property estimated by means of rapid chloride migration test on mortar samples. The results suggested that in hydrated cementitious system the capillary pore connections influencing mass transport should be mainly attributed to the connectivity of small capillary pores, whose relevance to chloride migration coefficient has also been testified by the well-fitted experimental plots in this study.",

keywords = "cementitious system, Microstructure, pore connectivity, chloride transport",

author = "Yong Zhang and Guang Ye",

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booktitle = "Proceedings of the 3rd International RILEM Conferences on Microstructure Related Durability of Cementitious Composites",

publisher = "Rilem",

note = "3rd International Conferences on Microstructure Related Durability of Cementitious Composites , Microdurability 2016 ; Conference date: 24-10-2016 Through 26-10-2016",

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Zhang, Y & Ye, G 2016, Experimental study on pore connectivity and its influence on chloride transport in saturated cementitious system. in C Miao, W Sun, J Liu, H Chen, G Ye & K van Breugel (eds), Proceedings of the 3rd International RILEM Conferences on Microstructure Related Durability of Cementitious Composites: Nanjing, China. vol. 117, Rilem, pp. 1-8, 3rd International Conferences on Microstructure Related Durability of Cementitious Composites , Nanjing, China, 24/10/16.

Experimental study on pore connectivity and its influence on chloride transport in saturated cementitious system. / Zhang, Yong; Ye, Guang.
Proceedings of the 3rd International RILEM Conferences on Microstructure Related Durability of Cementitious Composites: Nanjing, China. ed. / Changwen Miao; Wei Sun; Jiaping Liu; Huisu Chen; Guang Ye; Klaas van Breugel. Vol. 117 Rilem, 2016. p. 1-8.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific

TY - GEN

T1 - Experimental study on pore connectivity and its influence on chloride transport in saturated cementitious system

AU - Zhang, Yong

AU - Ye, Guang

N1 - Conference code: 3

PY - 2016

Y1 - 2016

N2 - The purpose of this paper is to investigate the pore connectivity and its influence on chloride transport property in cementitious materials under saturated condition. Mercury intrusion porosimetry experiment was carried out on a variety of hydrated cement pastes curing up to one year. By repeating pressurization-depressurization cycles, pore entrapment (namely ink-bottled effect) was expressed as a function of the equivalent diameter of penetrated throat neck pores. Accordingly, the small capillary pores that are present within patches of hydration products and the large capillary pores that are left out of hydration products were distinguished and their connections were ascertained, which provide evident basis for the study of transport property estimated by means of rapid chloride migration test on mortar samples. The results suggested that in hydrated cementitious system the capillary pore connections influencing mass transport should be mainly attributed to the connectivity of small capillary pores, whose relevance to chloride migration coefficient has also been testified by the well-fitted experimental plots in this study.

AB - The purpose of this paper is to investigate the pore connectivity and its influence on chloride transport property in cementitious materials under saturated condition. Mercury intrusion porosimetry experiment was carried out on a variety of hydrated cement pastes curing up to one year. By repeating pressurization-depressurization cycles, pore entrapment (namely ink-bottled effect) was expressed as a function of the equivalent diameter of penetrated throat neck pores. Accordingly, the small capillary pores that are present within patches of hydration products and the large capillary pores that are left out of hydration products were distinguished and their connections were ascertained, which provide evident basis for the study of transport property estimated by means of rapid chloride migration test on mortar samples. The results suggested that in hydrated cementitious system the capillary pore connections influencing mass transport should be mainly attributed to the connectivity of small capillary pores, whose relevance to chloride migration coefficient has also been testified by the well-fitted experimental plots in this study.

KW - cementitious system

KW - Microstructure

KW - pore connectivity

KW - chloride transport

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M3 - Conference contribution

SN - 978-2-35158-188-9

VL - 117

SP - 1

EP - 8

BT - Proceedings of the 3rd International RILEM Conferences on Microstructure Related Durability of Cementitious Composites

A2 - Miao, Changwen

A2 - Sun, Wei

A2 - Liu, Jiaping

A2 - Chen, Huisu

A2 - Ye, Guang

A2 - van Breugel, Klaas

PB - Rilem

T2 - 3rd International Conferences on Microstructure Related Durability of Cementitious Composites

Y2 - 24 October 2016 through 26 October 2016

ER -

Experimental study on pore connectivity and its influence on chloride transport in saturated cementitious system

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