Improvements on Mechanical Property and Microstructure of Cementitious Composite Incorporated with Silica Fume and Carbon Nanotube

Abstract:

Nano-size fillers (ultrafine silica fume (USF) or/and multi-walled carbon nanotube (MWCT)) were incorporated into cement matrix to fabricate nano-fillers reinforced cementitious materials (NFRCs) with surfactant ultrasonic dispersion and subsequently mix cast process. The flexural and compressive strengths of four groups NFRCs with varied nano-filler loading were comprehensively investigated. Results show, there are positive effects on the flexural and compressive strength of NFRCs with nano-fillers loading, especially when USF and MWCT are incorporated simultaneously, and the correspondent maximal flexural and compressive strength can increase by above 17%, 28% with respect to the baseline, respectively. The pozzolan infilling effect of USF and the crack-bridging effect of dispersed MWCT result in the dense and integrated network microstructures of cured NFRC.

• Periodical: Solid State Phenomena (Volume 298)
• Pages: 167-171
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.298.167
• Online since: October 2019
• Authors: Gu Yue Han, Jian Lin Luo*
• Keywords: Carbon Nanotube, Cement-Based Material, Mechanical Properties, Microstructure, Nanofiller

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