Cement is one of the worlds most widely used building materials and as such great lengths have been taken over the years to further improve the mechanical properties and durability of cementitious materials in order to increase reliability and decrease maintenance costs. The mechanical properties of carbon microfibers (CF) have made them attractive candidates for the reinforcement of several matrices including cement. Technological advancements have led to the development of carbon nanofibers (CNF) with even more advantageous mechanical properties due to their smaller size and therefore show tremendous promise as reinforcement in cementitious materials.
This research studied the effects of carbon fiber type (CF vs. CNF) and CNF loading on Portland cement pastes and silica fume Portland cement pastes. CNF loading up to 0.5 wt% had no significant effect on the compressive and tensile strength of the pastes. In contrast, 2 wt% CNF loading was found to decrease the compressive strength of the Portland cement paste. Addition of 2 wt% CNF enhanced the water penetration resistance of the cement pastes and improved the durability with respect to decalcification and leaching.
| Identifer | oai:union.ndltd.org:VANDERBILT/oai:VANDERBILTETD:etd-12052008-151953 |
| Date | 05 December 2008 |
| Creators | Ince, Chantal Kerie |
| Contributors | Florence Sanchez |
| Publisher | VANDERBILT |
| Source Sets | Vanderbilt University Theses |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.vanderbilt.edu/available/etd-12052008-151953/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Vanderbilt University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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