The interfacial properties of cement and carbon fiber modified by nano silicon

Author(s): Haonan Yang, Huigang Xiao, Xiaojiao Li
Paper category: Proceedings
Book title: 1st International Conference on UHPC Materials and Structures
Editor(s): Caijun Shi and Dehui Wang
ISBN: 978-2-35158-164-3
e-ISBN: 978-2-35158-165-O
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 463-467
Total Pages: 05
Language: English

Abstract: The properties of the fiber/matrix interface are of primary significance for the mechanical property and durability of fiber reinforced cement-based composites. Generally speaking, the better the bond, the better composites. Therefore, interface bond strengthening has important significance. In the paper, sol gel method was used to treat carbon fiber’s surface. Using scanning electron microscope(SEM) and X-ray photoelectron spectroscopy(XPS) analysis of surface modification effect, the optimum solution of PH, ethyl silicate and water volume ratio (E/W), the dosage of ethanol (C), the reaction temperature (T) are detected. Furthermore, through the pull-out test of the interface performance was quantified. the results showed that the best solution of carbon fiber surface modification effect was E/W=12/12, PH=2~3, C=100ml, T=40 C. The specific surface area of compatibility was good and interface bonding was firm in carbon fiber/cement composites, the 28d bond strength of treated carbon fiber cement matrix interface reached 3.1574 MPa, compared with the untreated carbon fiber increased by 204%.

Online publication: 2016
Publication type : full_text
Public price (Euros): 0.00