Abstract
Carbon powder waste (CPW) obtained from the cutting process of laminate carbon composites, can be used to improve the strength and toughness of traditional cement-based building materials. Therefore, although the addition of CPW may influence the properties of the cement-based material, it is not clear how this influence works, and what are the optimum amount and fibre type in order not to have a negative impact on the new material. For these reasons, an experimental evaluation of the influence of recycled CPW addition on the physical and mechanical properties of reinforced cement pastes has been developed in this paper. With these purposes, seven different cement paste mixtures, with the same water/cement ratio, but with two different recycled CPW, and four different percentages have been evaluated. Based on the results, the decrease of compressive strength and abrasion resistance was attributed to the higher porosity of the cement paste caused by the CPW presence, while the flexural strength improvement could be attributed to good fibre distribution achieved into the cement pastes. Finally it was found that the type and amount of recycled CPW added in the cement pastes did not have a clear influence on the mechanical properties and abrasion resistance of the cement paste.
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Acknowledgments
The first author wish to thank the company Carbontek S.L. and the Laboratory of the Science and Engineering of Materials (LADICIM) for the financial support for his postdoctoral research developed at the Department of Science and Engineering of Ground and Materials of the University of Cantabria.
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Norambuena-Contreras, J., Thomas, C., Borinaga-Treviño, R. et al. Influence of recycled carbon powder waste addition on the physical and mechanical properties of cement pastes. Mater Struct 49, 5147–5159 (2016). https://doi.org/10.1617/s11527-016-0850-4
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DOI: https://doi.org/10.1617/s11527-016-0850-4