4.6 Article

Sulfuric Acid Resistance of CNT-Cementitious Composites

Journal

APPLIED SCIENCES-BASEL
Volume 11, Issue 5, Pages -

Publisher

MDPI
DOI: 10.3390/app11052226

Keywords

cementitious composites; carbon nanotube (CNT); multi-walled CNT; single walled CNT; self-sensing; durability; sulfate attack

Funding

  1. Basic Science Research Program through the National Research Foundation of Korea(NRF) - Ministry of Education [2018R1A4A1025953]

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This study found that cement mortar incorporating carbon nanotubes exhibited enhanced durability and electrical properties under deterioration induced by sulfate attack, as the CNTs provided strong resistance to acid corrosion.
This study analyzed changes in the durability characteristics of cement mortar incorporating carbon nanotube (CNT) and the electrical properties subjected to deterioration induced by sulfate attack. Powder types of multi-walled or single-walled CNTs were used and added to the composites with 1.0% and 2.0% mass fraction, and the specimens were immersed in 5% and 10% sulfuric acid solutions to investigate the durability of CNT cementitious composites. Although mechanical performance decreased due to relatively large pores (370-80 mu m) caused by CNTs, specimens incorporating CNTs exhibited enhanced resistance to sulfuric acid as CNTs, which offered strong resistance to acid corrosion, and prevented contact between the cement hydrate and the sulfuric acid solution. Therefore, it is expected that self-sensing performance was exhibited because there were no significant differences in the electrical properties of cement mortar subjected to the deterioration by sulfate attack.

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