Transport and mechanical properties of self consolidating concrete with high volume fly ash |
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| Authors: | Mustafa Şahmaran İsmail Ö. Yaman Mustafa Tokyay |
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| Affiliation: | 1. Department of Civil Engineering, Gaziantep University, Gaziantep, Turkey;2. Department of Civil Engineering, Middle East Technical University, Ankara, Turkey;1. Escuela de Ingeniería Mazatlán, Universidad Autónoma de Sinaloa, Mexico;2. Dpto. Ingeniería Civil: Construcción, Universidad Politécnica de Madrid, Spain;3. Dpto. de Ingeniería Agroforestal, Universidad Politécnica de Madrid, Spain;1. National Technical University of Athens, School of Civil Engineering, Laboratory of Reinforced Concrete, 5 Heroon Polytechniou, 15773 Athens, Greece;2. National Technical University of Athens, School of Chemical Engineering, Laboratory of Analytical and Inorganic Chemistry, 9 Heroon Polytechniou, 15773 Athens, Greece;1. Department of Architecture, Hwa-sha Institue of Technology, 1, Gongjhuan Rd., Zhonghe Dist., New Taipei City, Taiwan;2. Department of Civil Engineering, Can Tho University, Campus II, 3/2 Street, Ninh Kieu District, Can Tho City, Viet Nam;3. Department of Construction Engineering, National Taiwan University of Science and Technology, 43, Keelung Rd., Sec. 4, Taipei 106, Taiwan |
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| Abstract: | This paper presents the transport and mechanical properties of self consolidating concrete that contain high percentages of low-lime and high-lime fly ash (FA). Self consolidating concretes (SCC) containing five different contents of high-lime FA and low-lime FA as a replacement of cement (30, 40, 50, 60 and 70 by weight of total cementitious material) are examined. For comparison, a control SCC mixture without any FA was also produced. The fresh properties of the SCCs were observed through, slump flow time and diameter, V-funnel flow time, L-box height ratio, and segregation ratio. The hardened properties included the compressive strength, split tensile strength, drying shrinkage and transport properties (absorption, sorptivity and rapid chloride permeability tests) up to 365 days. Test results confirm that it is possible to produce SCC with a 70% of cement replacement by both types of FA. The use of high volumes of FA in SCC not only improved the workability and transport properties but also made it possible to produce concretes between 33 and 40 MPa compressive strength at 28 days, which exceeds the nominal compressive strength for normal concrete (30 MPa). |
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