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A platform for research: civil engineering, architecture and urbanism
Self-healing at early-age, a way to improve the chloride resistance of blast-furnace slag cementitious materials
https://orcid.org/0000-0001-8659-5866
HighlightsSelf-healing of cementitious materials limits chloride penetration.At early age, the blast-furnace slag addition increases the self-healing capacity.Migration coefficient of self-healed materials is proportional to crack width.Crack width, tortuosity, constructivity and ionic interaction affect diffusivity.
AbstractHaving a good chloride penetration resistance, blast-furnace slag cementitious materials are often used in coastal and marine structures. This type of civil engineering structures however can present cracking at early age (<28days) due to restrained shrinkage and thus their ability to limit chloride penetration can be significantly affected. In order to quantify the capacity of self-healing to improve their durability, chloride migration tests were performed on self-healed mortar mixtures with different contents of blast-furnace slag cracked at early age. The effect of different parameters on the chloride migration is analyzed: the presence of a traversing crack, the addition of blast-furnace slag, the self-healing and its kinetics. Analytical and numerical simulations on a cracked specimen are performed in order to improve our understanding of the chloride migration, especially in the case of self-healed cementitious material, and to evaluate the parameters (crack width, tortuosity and constrictivity) affecting it. Results clearly indicate that self-healing limits the chloride penetration and improves the structural durability, particularly for mixtures containing blast-furnace slag. Moreover, it is shown that the chloride migration test is an adequate method to monitor the self-healing process. Finally, self-healed specimens can be simply regarded as specimens characterized by a smaller crack. This is quite an important result for life assessment of concrete structures cracked at early-age.
Self-healing at early-age, a way to improve the chloride resistance of blast-furnace slag cementitious materials
https://orcid.org/0000-0001-8659-5866
HighlightsSelf-healing of cementitious materials limits chloride penetration.At early age, the blast-furnace slag addition increases the self-healing capacity.Migration coefficient of self-healed materials is proportional to crack width.Crack width, tortuosity, constructivity and ionic interaction affect diffusivity.
AbstractHaving a good chloride penetration resistance, blast-furnace slag cementitious materials are often used in coastal and marine structures. This type of civil engineering structures however can present cracking at early age (<28days) due to restrained shrinkage and thus their ability to limit chloride penetration can be significantly affected. In order to quantify the capacity of self-healing to improve their durability, chloride migration tests were performed on self-healed mortar mixtures with different contents of blast-furnace slag cracked at early age. The effect of different parameters on the chloride migration is analyzed: the presence of a traversing crack, the addition of blast-furnace slag, the self-healing and its kinetics. Analytical and numerical simulations on a cracked specimen are performed in order to improve our understanding of the chloride migration, especially in the case of self-healed cementitious material, and to evaluate the parameters (crack width, tortuosity and constrictivity) affecting it. Results clearly indicate that self-healing limits the chloride penetration and improves the structural durability, particularly for mixtures containing blast-furnace slag. Moreover, it is shown that the chloride migration test is an adequate method to monitor the self-healing process. Finally, self-healed specimens can be simply regarded as specimens characterized by a smaller crack. This is quite an important result for life assessment of concrete structures cracked at early-age.
Self-healing at early-age, a way to improve the chloride resistance of blast-furnace slag cementitious materials
https://orcid.org/0000-0001-8659-5866
HighlightsSelf-healing of cementitious materials limits chloride penetration.At early age, the blast-furnace slag addition increases the self-healing capacity.Migration coefficient of self-healed materials is proportional to crack width.Crack width, tortuosity, constructivity and ionic interaction affect diffusivity.
AbstractHaving a good chloride penetration resistance, blast-furnace slag cementitious materials are often used in coastal and marine structures. This type of civil engineering structures however can present cracking at early age (<28days) due to restrained shrinkage and thus their ability to limit chloride penetration can be significantly affected. In order to quantify the capacity of self-healing to improve their durability, chloride migration tests were performed on self-healed mortar mixtures with different contents of blast-furnace slag cracked at early age. The effect of different parameters on the chloride migration is analyzed: the presence of a traversing crack, the addition of blast-furnace slag, the self-healing and its kinetics. Analytical and numerical simulations on a cracked specimen are performed in order to improve our understanding of the chloride migration, especially in the case of self-healed cementitious material, and to evaluate the parameters (crack width, tortuosity and constrictivity) affecting it. Results clearly indicate that self-healing limits the chloride penetration and improves the structural durability, particularly for mixtures containing blast-furnace slag. Moreover, it is shown that the chloride migration test is an adequate method to monitor the self-healing process. Finally, self-healed specimens can be simply regarded as specimens characterized by a smaller crack. This is quite an important result for life assessment of concrete structures cracked at early-age.
Self-healing at early-age, a way to improve the chloride resistance of blast-furnace slag cementitious materials
Darquennes, A. (author) / Olivier, K. (author) / Benboudjema, F. (author) / Gagné, R. (author)
Construction and Building Materials ; 113 ; 1017-1028
2016-03-17
12 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016
Effect of blast furnace slag on self-healing of microcracks in cementitious materials
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