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

Yong Zhang, Guang Ye

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific

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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 languageEnglish
Title of host publicationProceedings of the 3rd International RILEM Conferences on Microstructure Related Durability of Cementitious Composites
Subtitle of host publicationNanjing, China
EditorsChangwen Miao, Wei Sun, Jiaping Liu, Huisu Chen, Guang Ye, Klaas van Breugel
PublisherRilem
Pages1-8
Number of pages8
Volume117
ISBN (Electronic)978-2-35158-189-6
ISBN (Print)978-2-35158-188-9
Publication statusPublished - 2016
Event3rd International Conferences on Microstructure Related Durability of Cementitious Composites - Nanjing, China
Duration: 24 Oct 201626 Oct 2016
Conference number: 3
http://www.microdurability2016.com/

Conference

Conference3rd International Conferences on Microstructure Related Durability of Cementitious Composites
Abbreviated titleMicrodurability 2016
Country/TerritoryChina
CityNanjing
Period24/10/1626/10/16
Internet address

Keywords

  • cementitious system
  • Microstructure
  • pore connectivity
  • chloride transport

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