Commercial and recycled carbon/steel fibers for fiber-reinforced cement mortars with high electrical conductivity

By Alberto Belli, A. Mobili, Tiziano Bellezze, F. Tittarelli. 2020

147 citations recorded by the source corpus.

Abstract The paper aims to provide a comprehensive study on the compositional optimization of high-conductive multifunctional fiber-reinforced cement mortars (FRCMs). Therefore, the effects of three different fiber types: virgin carbon fibers (VCFs), recycled carbon fibers (RCFs), and brass-plated steel fibers (BSFs), added at a broad range of concentrations, as 0.05%, 0.1%, 0.2%, 0.4%, 0.8%, 1.2%, and 1.6% by volume, on the mechanical, electrical and durability properties of FRCMs have been compared. The results showed that RCFs increase the flexural and tensile splitting strength up to 100%, whereas BSFs improve the compressive strength by 38%. Moreover, the fibers decrease both the capillary water absorption and the drying shrinkage by 39%. Electrical conductivity tests show that RCFs decrease the electrical resistivity of mortars up to one order of magnitude, in addition to a percolation threshold between 0.1 and 0.2 vol%.

Subfields: Civil and Structural Engineering, Pollution

View Paper: https://www.semanticscholar.org/paper/8c586ab45e90bd4cb9bac4549b1c1033e7ed6535