Advance treatment by nanographite for Portland pulverised fly ash cement (the class F) systems |
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| Affiliation: | 1. Department of Civil, Structural, and Environmental Engineering, University at Buffalo, State University of New York, Buffalo, NY 14260, USA;2. Material Science and Technology Division, Physical Sciences Directorate, Oak Ridge National Lab, Oak Ridge, TN 37831, USA;3. Department of Mechanical and Aerospace Engineering, University at Buffalo, State University of New York, Buffalo, NY 14260, USA;1. Composites Research Group, Department of Mechanical Engineering, Durban University of Technology, Durban, South Africa;2. Composites Technology Centre, Department of Aerospace Engineering, Indian Institute of Technology, Madras, India;1. Department of Civil Engineering, University of Texas at Arlington, Box 19308, Arlington, TX 76019, USA;2. Innovative Engineering Associates, 18333 Preston Road, Suite 205, Dallas, TX 75252, USA;1. 63981 Unit of PLA, Wuhan 430311, China;2. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | This is a full article that overcomes such some negative side effects as rapid coagulation and reduced early strength in class F fly ash-substituted cement (FFA-SC) by serving nano graphite particle (nG). This study uses class F fly ash (FFA), nG, and ASTM type I cement as constituent materials to prepare proper pulverized fly ash–Portland cement combinations (35% FFA + 65% ASTM I + 1.1% nG i.e.). Pastes include lime and/or lime + nG, and tap water to examine ups and downs in Ca(OH)2 content. Mortars also contain these prepared cements, tap water and/or tap water + super plasticizer (SP), and mortar sand in order to measure fluidity, flexural strength, and compressive strength according to present standard methods. Results indicate for FFA-SC system that the nano graphite particle increases the reduced early strength gain at early age, and the SP reduces the rapid coagulation. The use of nG also shows to be favorable in terms of the Ca(OH)2 content, the fluidity and the flexural strength gain, and compressive strength gain in FFA-SC system when compared to the pure Portland cement with and without nano graphite particle. |
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| Keywords: | A. Nano-structures A. Recycling B. Mechanical properties B. Physical properties Portland pulverised fly ash cement |
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