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Pore size dependent connectivity and ionic transport in saturated cementitious materials
https://orcid.org/0000-0001-9402-4975
https://orcid.org/0000-0001-8566-3863
https://orcid.org/0000-0003-1703-4963
Highlights Intrusion-extrusion cyclic mercury porosimetry provides a clear picture of the pore connectivity. The small capillary pores are highly interconnected in ordinary Portland cement pastes. The connectivity of the capillary pores below 0.05 μm is significantly decreased by adding slag or fly ash. There is a power relationship between connectivity of small capillary pores and chloride migration coefficient.
Abstract Microstructure-property relationship has drawn strong attention in modern material science. The progress achieved in this field relies on a common basis that the material performance originates from the microstructure. This paper brings together new insights and facts from experiments regarding the pore size dependent connectivity and its relation to ionic transport property in saturated cementitious materials. An innovative measurement, i.e. intrusion-extrusion cyclic mercury porosimetry (IEC-MIP), is proposed to distinguish between the small capillary pores that are present within clusters of hydration products and the large capillary pores that are left out of hydration products. The distribution of connectivity as a function of pore size in cementitious materials is analyzed. A novel transport parameter, i.e. connectivity of small capillary pores, is introduced and quantified by IEC-MIP measurements. The ionic transport was measured by means of rapid chloride migration tests. A power relationship is established between connectivity of small capillary pores and chloride migration coefficient for cementitious materials irrespective of the binder type.
Pore size dependent connectivity and ionic transport in saturated cementitious materials
https://orcid.org/0000-0001-9402-4975
https://orcid.org/0000-0001-8566-3863
https://orcid.org/0000-0003-1703-4963
Highlights Intrusion-extrusion cyclic mercury porosimetry provides a clear picture of the pore connectivity. The small capillary pores are highly interconnected in ordinary Portland cement pastes. The connectivity of the capillary pores below 0.05 μm is significantly decreased by adding slag or fly ash. There is a power relationship between connectivity of small capillary pores and chloride migration coefficient.
Abstract Microstructure-property relationship has drawn strong attention in modern material science. The progress achieved in this field relies on a common basis that the material performance originates from the microstructure. This paper brings together new insights and facts from experiments regarding the pore size dependent connectivity and its relation to ionic transport property in saturated cementitious materials. An innovative measurement, i.e. intrusion-extrusion cyclic mercury porosimetry (IEC-MIP), is proposed to distinguish between the small capillary pores that are present within clusters of hydration products and the large capillary pores that are left out of hydration products. The distribution of connectivity as a function of pore size in cementitious materials is analyzed. A novel transport parameter, i.e. connectivity of small capillary pores, is introduced and quantified by IEC-MIP measurements. The ionic transport was measured by means of rapid chloride migration tests. A power relationship is established between connectivity of small capillary pores and chloride migration coefficient for cementitious materials irrespective of the binder type.
Pore size dependent connectivity and ionic transport in saturated cementitious materials
https://orcid.org/0000-0001-9402-4975
https://orcid.org/0000-0001-8566-3863
https://orcid.org/0000-0003-1703-4963
Highlights Intrusion-extrusion cyclic mercury porosimetry provides a clear picture of the pore connectivity. The small capillary pores are highly interconnected in ordinary Portland cement pastes. The connectivity of the capillary pores below 0.05 μm is significantly decreased by adding slag or fly ash. There is a power relationship between connectivity of small capillary pores and chloride migration coefficient.
Abstract Microstructure-property relationship has drawn strong attention in modern material science. The progress achieved in this field relies on a common basis that the material performance originates from the microstructure. This paper brings together new insights and facts from experiments regarding the pore size dependent connectivity and its relation to ionic transport property in saturated cementitious materials. An innovative measurement, i.e. intrusion-extrusion cyclic mercury porosimetry (IEC-MIP), is proposed to distinguish between the small capillary pores that are present within clusters of hydration products and the large capillary pores that are left out of hydration products. The distribution of connectivity as a function of pore size in cementitious materials is analyzed. A novel transport parameter, i.e. connectivity of small capillary pores, is introduced and quantified by IEC-MIP measurements. The ionic transport was measured by means of rapid chloride migration tests. A power relationship is established between connectivity of small capillary pores and chloride migration coefficient for cementitious materials irrespective of the binder type.
Pore size dependent connectivity and ionic transport in saturated cementitious materials
Zhang, Yong (author) / Ye, Guang (author) / Yang, Zhengxian (author)
2019-11-22
Article (Journal)
Electronic Resource
English
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