A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Electrical Resistivity and Carbonation Front of LC3 Concretes Incorporating Different Supplementary Cementitious Materials
Due to the clinkerization process during the Portland cement production, large amounts of CO2 are emitted, increasing the effects related to climate change, consequently, the seek for alternatives to mitigate these emissions are necessary. The use of supplementary cementitious materials (SCM) to partially replace Portland clinker/cement has been the subject of different research, including the use of LC3 (Limestone Calcined Clay Cements), where up to 50% of Portland clinker can be replaced. However, the cement industry has already used other SCM with pozzolanic activities in commercial cement and the interaction in LC3 still needs contributions. In this sense, this work evaluates the performance of concretes containing LC3 mixtures incorporating different SCM (silica fume, fly ash, sugarcane bagasse ash, and acai stone ash) regarding its durability by volumetric electrical resistivity and accelerated carbonation. The results showed that the presence of SCM in LC3 concretes increases the resistivity to ionic flow probably due to a refinement in the concrete microstructure, whereas, for carbonation, all concrete with LC3 presented higher carbonation fronts in relation to the reference concrete due to the low Portlandite availability to react with the CO2 that penetrates into the concrete pores.
Electrical Resistivity and Carbonation Front of LC3 Concretes Incorporating Different Supplementary Cementitious Materials
Due to the clinkerization process during the Portland cement production, large amounts of CO2 are emitted, increasing the effects related to climate change, consequently, the seek for alternatives to mitigate these emissions are necessary. The use of supplementary cementitious materials (SCM) to partially replace Portland clinker/cement has been the subject of different research, including the use of LC3 (Limestone Calcined Clay Cements), where up to 50% of Portland clinker can be replaced. However, the cement industry has already used other SCM with pozzolanic activities in commercial cement and the interaction in LC3 still needs contributions. In this sense, this work evaluates the performance of concretes containing LC3 mixtures incorporating different SCM (silica fume, fly ash, sugarcane bagasse ash, and acai stone ash) regarding its durability by volumetric electrical resistivity and accelerated carbonation. The results showed that the presence of SCM in LC3 concretes increases the resistivity to ionic flow probably due to a refinement in the concrete microstructure, whereas, for carbonation, all concrete with LC3 presented higher carbonation fronts in relation to the reference concrete due to the low Portlandite availability to react with the CO2 that penetrates into the concrete pores.
Electrical Resistivity and Carbonation Front of LC3 Concretes Incorporating Different Supplementary Cementitious Materials
Building Pathology
Delgado, J. M. P. Q. (editor) / Balestra, C. E. T. (author) / Savaris, G. (author) / Schneider, R. (author) / Nakano, A. Y. (author) / Pietrobelli, M. H. (author)
Building Pathologies: Experimental Campaigns and Numerical Procedures ; Chapter: 6 ; 129-140
2023-03-02
12 pages
Article/Chapter (Book)
Electronic Resource
English
| British Library Online Contents | 2007