Axial Compressive Behavior of Reinforced Concrete (RC) Columns Incorporating Multi-Walled Carbon Nanotubes and Marble Powder

• Published in: Crystals (Basel) Vol. 11; no. 3; p. 247
• Main Authors: Khan, Abdul Jalil, Ali Qureshi, Liaqat, Khan, Muhammad Nasir Ayaz, Gul, Akhtar, Umar, Muhammad, Manan, Aneel, Badrashi, Yasir Irfan, Abbas, Asim, Javed, Usman, Farooq, Rashid
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-03-2021
• Subjects: Aggregates; Calcium silicate hydrate; calcium silicate hydrate (C-S-H); Carbon; Cement; Cement reinforcements; Compressive properties; Compressive strength; Concrete; Concrete columns; Cubes; Ductility; Filler materials; Marble; marble powder; Mechanical properties; Mortars (material); Multi wall carbon nanotubes; multi-walled carbon nanotubes (MWCNTs); Nanomaterials; Physical properties; Reinforced concrete; reinforced concrete (RC) column; Strain analysis; Tensile strength; Waste materials; Weight; Pakistan
• ISSN: 2073-4352; 2073-4352
• DOI: 10.3390/cryst11030247

In this study, Multiwalled Carbon Nanotubes (MWCNTs) and Marble Powder (MP) have been utilized in reinforced concrete columns to assess their structural behavior. The nanotubes from 0.025% to 0.20% and 5% MP by weight of cement were used. The compressive strength of reinforced concrete columns and cubes was analyzed as the main property. The incorporation of MWCNTs and marble powder was able to increase the compressive strength of columns by 72.69% and mortar by 42.45% as compared to reference concrete. The ductility was noted to be improved by 42.04%. The load-deformation and stress-strain behaviors were also analyzed. The Scanning Electron Microscopy (SEM) analysis revealed the formation of a strong compact bridge (90–100 layers), Calcium Silicate Hydrate (C-S-H) gel, evenly dispersion, and bridging effect caused by MWCNTs. The incorporation of 0.20% MWCNTs by weight of cement was recommended to be effectively used as a reinforcing agent in concrete.