Dynamic properties of microfine cement grouted sands |
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| Institution: | 1. Dept. of Civil and Environmental Engineering, Brigham Young Univ., 368 Clyde Building, Provo, UT 84602, United States;2. Caruso Turley Scott Inc., 1215 W. Rio Salado Parkway, Suite 200, Tempe, AZ 85281, United States;3. Concrete Masonry Association of California and Nevada, 6060 Sunrise Vista Drive, Suite 1990, Citrus Heights, CA 95610, United States;1. State Key Laboratory for Geomechanics & Deep Underground Engineering, School of Mechanics & Civil Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China;2. Jiangsu Collaborative Innovation Center for Building Energy Saving and Construction Technology, Xuzhou, Jiangsu 221116, China;3. Department of Civil and Environmental Engineering, College of Engineering, Design and Physical Sciences, Brunel University, Uxbridge, Middlesex UB8 3PH, UK;1. School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China;2. National Local Joint Engineering Laboratory of Major Infrastructure Testing and Rehabilitation Technology, Zhengzhou 450001, China;3. Collaborative Innovation Center of Water Conservancy and Transportation Infrastructure Safety, Henan Province, Zhengzhou 450001, China;1. Sewage Division, Busan Metropolitan City, Busan 47545, Republic of Korea;2. Backyoung G&C Co., Ltd., Seoul 156-095, Republic of Korea;3. Department of Civil, Environmental and Urban Engineering, Kyungsung University, Busan 608-735, Republic of Korea;4. Department of Civil Engineering, Korea Maritime and Ocean University, Busan 49112, Republic of Korea;1. College of Water Conservancy and Environmental Engineering, Zhengzhou University, No. 100, Science Avenue, Zhengzhou 450001, PR China;2. Collaborative Innovation Center of Water Conservancy and Transportation Infrastructure Safety Protection, Zhengzhou University, Zhengzhou, Henan 450001, PR China;3. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, No. 1, Xikang Road, Nanjing 210098, PR China;4. Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, No. 1, Xikang Road, Nanjing 210098, PR China;5. College of Civil Engineering, Southeast University, Nanjing 210096, PR China;6. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou 325035, PR China |
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| Abstract: | Torsional resonant column and bender element tests were conducted on microfine and ordinary cement grouted sands and the effects of confining pressure, shear strain, grout water-to-cement (W/C) ratio, cement type and gradation on the dynamic properties were evaluated. The shear and initial Young's moduli of the grouted sands increased with increasing confining pressure and decreasing shear strain, while damping ratio had the opposite behavior. The grout W/C ratio had the strongest effect on the values of the dynamic properties of the grouted sands, followed by cement grain size and cement pozzolan content. Depending on grout W/C ratio and confining pressure, the shear and initial Young's moduli values and the damping ratio values of the clean sands were improved by a factor of 4–25 and 2–6, respectively. The effect of testing conditions or material parameters on the Poisson ratio values of the grouted sands was negligible. |
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