Title: Self-healing of self-compacting concretes made with blast furnace slag cements activated by crystalline admixture
Authors: Emilio M. Takagi; Maryangela G. Lima; Paulo Helene; Ronaldo A. Medeiros-Junior
Addresses: MC Bauchemie, Aeronautics Institute of Technology (ITA), Marechal Eduardo Gomes, 50, Sao Jose dos Campos, Brazil ' Aeronautics Institute of Technology (ITA), Marechal Eduardo Gomes, 50, Sao Jose dos Campos, Brazil ' University of Sao Paulo (USP), Luciano Gualberto Street, 380, Sao Paulo, Brazil ' Federal University of Parana (UFPR), Centro Politecnico, Curitiba, Brazil
Abstract: Test samples were examined using a specific crystalline admixture, AR glass fibre and three types of cements with percentages of blast furnace slag (BFS) of 55%, 35% and 0%. Test specimens were loaded under compression until 90% of their failure load, in order to generate a network of micro-cracks. These samples were subsequently immersed in lime water to trigger the self-healing mechanism, followed by various tests at 28, 56 and 84 days. As BFS content ratio was increased to 55%, there was a noticeable increase in mechanical recovery and permeation reduction properties, indicating good self-healing.
Keywords: concrete structures; self-healing; materials technology; blast furnace slag; BFS; mechanical properties; permeation properties; cement; crystalline admixture; Cat-X; construction material; cracks.
International Journal of Materials and Product Technology, 2018 Vol.56 No.1/2, pp.169 - 186
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