An experimental study on optimum usage of GGBS for the compressive strength of concrete |
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| Affiliation: | 1. Department of Civil Engineering, Faculty of Engineering, Kocaeli University, 41010 Kocaeli, Turkey;2. Department of Civil Engineering, Faculty of Civil Engineering, Istanbul Technical University, Maslak, Istanbul 80626, Turkey;1. School of Engineering, University of Plymouth, Plymouth PL4 8AA, UK;2. Center of Excellence Geopolymer and Green Technology, Universiti Malaysia Perlis, Perlis 01000, Malaysia;3. School of Materials Engineering, Universiti Malaysia Perlis, Perlis 01000, Malaysia;4. Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;1. Department of Civil Engineering, Thapar Institute of Engineering and Technology, Patiala 147 004, India;2. Department of Civil Engineering, Indian Institute of Technology, HauzKhas, New Delhi 110 016, India;1. Department of Civil Engineering, Swedish College of Engineering and Technology (SCET), Wah Cantt 47060, Pakistan;2. Department of Civil Engineering, COMSATS University Islamabad (CUI), Sahiwal Campus, Sahiwal 57000, Pakistan;3. Department of Civil Engineering, University of Engineering and Technology (UET), Taxila 47050, Pakistan;1. Research scholar, Department of Civil Engineering, GITAM University, Bangalore 562163, Karnataka, India;2. Director School of Technology and Professor, Department of Mechanical Engineering/Operations Management, School of Technology, GITAM University, Bangalore 562163, Karnataka, India;3. Professor, Department of Civil Engineering, GITAM Institute of Technology, GITAM University, Visakhapatnam 530045, Andhra Pradesh, India |
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| Abstract: | This paper presents a laboratory investigation on optimum level of ground granulated blast-furnace slag (GGBS) on the compressive strength of concrete. GGBS was added according to the partial replacement method in all mixtures. A total of 32 mixtures were prepared in four groups according to their binder content. Eight mixes were prepared as control mixtures with 175, 210, 245 and 280 kg/m3 cement content in order to calculate the Bolomey and Féret coefficients (KB, KF). For each group 175, 210, 245 and 280 kg/m3 dosages were determined as initial dosages, which were obtained by removing 30 percent of the cement content of control concretes with 250, 300, 350, and 400 kg/m3 dosages. Test concretes were obtained by adding GGBS to concretes in an amount equivalent to approximately 0%, 15%, 30%, 50%, 70%, 90% and 110% of cement contents of control concretes with 250, 300, 350 and 400 kg/m3 dosages. All specimens were moist cured for 7, 14, 28, 63, 119, 180 and 365 days before compressive strength testing.The test results proved that the compressive strength of concrete mixtures containing GGBS increases as the amount of GGBS increase. After an optimum point, at around 55% of the total binder content, the addition of GGBS does not improve the compressive strength. This can be explained by the presence of unreacted GGBS, acting as a filler material in the paste. |
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