The Characteristics of CNTCement Composites with Acid-Treated MWCNTs

Abstract EN

This study investigated the effects of acid-treated MWCNTs on the workability, compressive and tensile strength, porosity, and microstructure of CNT/cement composites.

While workability decreased with acid treatment of CNTs, compressive and tensile strength improved significantly.

Strength was also enhanced by using acid-treated CNTs alone, compared to using a surfactant with acid-treated CNTs.

MIP analysis revealed that the porosity decreases from using acid-treated CNTs and that using acid-treated CNTs without a surfactant was more effective in reducing the size of micropores.

A SEM analysis revealed improved CNT dispersion and dense hydration products in cement composites containing acid-treated CNTs.

Ultimately, the use of acid-treated CNTs improved the CNT dispersion within CNT/cement composites, enhanced the pore structure, and formed denser hydration products around CNTs.