Adding limestone fines as cementitious paste replacement to improve tensile strength,stiffness and durability of concrete |
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| Affiliation: | 1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangdong, China;2. Department of Civil Engineering, The University of Hong Kong, Hong Kong, China;1. Department of Civil Engineering, Babol University of Technology, Iran;2. Department of Civil Engineering, Sharif University of Technology, P.O. Box 11155-9313, Iran;3. Department of Civil Engineering, Lameigorgani University, Iran;1. Structural Engineering Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel;2. Nesher Cement Enterprises LTD, Ramla, Israel;1. School of Sustainable Engineering and The Built Environment, Arizona State University, Tempe, AZ 85287, United States;2. Department of Civil and Environmental Engineering, University of California Los Angeles, Los Angeles, CA, United States;3. California Nano Systems Institute, United States;1. Department of Civil Engineering, University of Tehran, Tehran, Iran;2. Department of Civil Engineering, University of Toronto, 35 St. George St., Toronto, ON M5S 1A4, Canada;1. National Institute of Standards and Technology, 100 Bureau Drive, Stop 8615, Gaithersburg, MD 20899, USA;2. Turner-Fairbanks Highway Research Center, Federal Highway Administration, 6300 Georgetown Pike, McLean, VA 22101, USA;3. Department of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA;4. Sika Technology AG – Central Research, Tueffenwies 16, CH-8048 Zurich, Switzerland;5. National Research Council Canada, 1200 Montreal Road, M-20, Ottawa, Ontario K1A 0R6, Canada;6. Turner-Fairbanks Highway Research Center, SES Group and Associates, 6300 Georgetown Pike, McLean, VA 22101, USA |
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| Abstract: | The addition of a filler such as limestone fines (LF) to fill into the voids between aggregate particles can reduce the cementitious paste volume needed to produce concrete. In previous studies, it has been found that the addition of LF to reduce the cementitious paste volume would substantially increase the cube strength, and reduce the heat generation and shrinkage of the concrete produced. In this study, the authors aimed to evaluate the effects of adding LF as cementitious paste replacement on the tensile strength, stiffness and durability of concrete. For the evaluation, a series of concrete mixes with LF added to replace an equal volume of cementitious paste were tested for their workability, cube strength, tensile splitting strength, modulus of elasticity, water penetration depth and chloride permeability. The results showed that the addition of LF as cementitious paste replacement would at the same water/cement ratio, and even at the same cube strength, improve the tensile strength, stiffness and durability of concrete. |
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| Keywords: | Durability Filler Limestone fines Permeability Stiffness Tensile strength |
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