The use of oil shale ash in Portland cement concrete |
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| Affiliation: | 1. Chalmers University of Technology, Division of Structural Engineering, Göteborg SE-41296, Sweden;2. Thomas Concrete Group AB, Södra Vägen 28, Göteborg 41254, Sweden;1. School of Civil Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia;2. Department of Civil Engineering, COMSATS University Islamabad, Abbottabad Campus, 22060, Pakistan;3. Institute of Noise and Vibration, School of Civil Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia;4. Mechanical Engineering Department, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia;5. Mechanical Engineering Department, Faculty of Engineering, Kafrelsheikh University, 33516, Egypt;6. King Abdulaziz University, College of Science & Arts, Department of Mathematics, Rabigh, Saudi Arabia;7. Department of Mechanics and Engineering Science, Peking University, Beijing, 100871, People’s Republic of China;8. Department of Mathematics and Statistics, Riphah International University I-14, Islamabad, 44000, Pakistan;9. Department of Civil Engineering, College of Engineering in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia;1. Airport Infrastructure, Technological Institute of Aeronautics, São José dos Campos, Brazil;2. CCR NovaDutra Road Research Centre, Santa Izabel, Brazil;3. Institute of Advanced Studies, São José dos Campos, Brazil;4. Federal Institute of São Paulo, Itapetininga, Brazil;1. Institute of Fundamental Technological Research Polish Academy of Sciences, Pawińskiego 5b, 02-106 Warsaw, Poland;2. Politecnico di Torino, Department of Structural, Building, and Geotechnical Engineering, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy;1. Department of Civil and Environmental Engineering, Politecnico di Milano, Italy;2. BATir, École Polytechnique de Bruxelles, Université Libre de Bruxelles, Belgium;3. Department of Structural Engineering and Building Materials, Ghent University, Belgium;4. Concrete Science and Technology Institute (ICITECH), Universitat Politecnica de Valencia, Spain;5. School of Architecture, Building and Civil Engineering, Loughborough University, UK;6. Faculty for the Built Environment, University of Malta, Malta;7. Institute of Construction Materials, Technische Universitaet Dresden, Germany;8. Institute of Construction Science Eduardo Torroja, IETcc-CSIC, Spain;9. Dep. of Mechanical Engineering and Construction, Universitat Jaume I, Spain |
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| Abstract: | An experimental investigation was undertaken to study the potential use of Jordanian oil shale ash (OSA) as a raw material or an additive to Portland cement mortar and concrete. Different series of mortar and concrete mixtures were prepared at different water to binder ratios, and different OSA replacements of cement and/or sand. The compressive strength of mortar and concrete specimens, cured in water at 23 °C, was determined over different curing periods which ranged from 3 to 90 days. The results of these tests were subjected to a statistical analysis. Equations were developed by regression analysis techniques to relate the effect of batch constituents on the strength developments of OSA mortars and concretes. The models were checked for accuracy by comparing their predictions with actual test results.The obtained results indicated that OSA replacement of cement, sand or both by about 10% (by wt) would yield the optimum compressive strength, and that its replacement of cement by up to 30% would not reduce its compressive strength, significantly. It was found that OSA on its own possesses a limited cementitious value and that its contribution to mortar or concrete comes through its involvement in the pozzolanic reactions. The statistical model developed showed an excellent predictability of the compressive strength for mortar and concrete mixes. |
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