Damping properties of sand-rubber mixtures
Vast amount of waste rubber tyres that are disposed at the landfill can be recycled for greater purposes. Rubber with its high damping characteristic can be used with soil to reduce vibrations when exposed to seismic loadings. Hence, the objective of this project is to determine the damping properti...
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sg-ntu-dr.10356-707682023-03-03T17:07:57Z Damping properties of sand-rubber mixtures Tay, Clara Hui Xia Leong Eng Choon School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering Vast amount of waste rubber tyres that are disposed at the landfill can be recycled for greater purposes. Rubber with its high damping characteristic can be used with soil to reduce vibrations when exposed to seismic loadings. Hence, the objective of this project is to determine the damping properties of sand-rubber mixtures. To achieve the objective, modified triaxial cell with bender elements was used to investigate the effect of the size of the rubber tyre chips, mix proportions of the sand-rubber mixtures and confining pressures on the damping properties of sand-rubber mixtures. Compression (P) and shear (S) wave signals were obtained at different frequencies: 10, 20 and 50 kHz for P-waves and 3, 5, 10, 20 kHz for S-waves. Samples were subjected to confining pressures of 50, 100, 200 and 400 kPa. Wave signals were then processed using MATLAB to determine the damping ratio using the Hilbert transform method. Results showed that small-strain shear modulus decreases with increasing rubber content and increases with increasing confining pressure. Damping ratio increases with increasing rubber content and decreases with increasing confining pressure. Damping ratio is higher for sand-coarse rubber mixtures indicating that larger rubber tyre chips are more effective in damping. Bachelor of Engineering (Civil) 2017-05-11T04:56:23Z 2017-05-11T04:56:23Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/70768 en Nanyang Technological University 93 p. application/pdf |
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DRNTU::Engineering::Civil engineering Tay, Clara Hui Xia Damping properties of sand-rubber mixtures |
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Vast amount of waste rubber tyres that are disposed at the landfill can be recycled for greater purposes. Rubber with its high damping characteristic can be used with soil to reduce vibrations when exposed to seismic loadings. Hence, the objective of this project is to determine the damping properties of sand-rubber mixtures.
To achieve the objective, modified triaxial cell with bender elements was used to investigate the effect of the size of the rubber tyre chips, mix proportions of the sand-rubber mixtures and confining pressures on the damping properties of sand-rubber mixtures.
Compression (P) and shear (S) wave signals were obtained at different frequencies: 10, 20 and 50 kHz for P-waves and 3, 5, 10, 20 kHz for S-waves. Samples were subjected to confining pressures of 50, 100, 200 and 400 kPa. Wave signals were then processed using MATLAB to determine the damping ratio using the Hilbert transform method.
Results showed that small-strain shear modulus decreases with increasing rubber content and increases with increasing confining pressure. Damping ratio increases with increasing rubber content and decreases with increasing confining pressure. Damping ratio is higher for sand-coarse rubber mixtures indicating that larger rubber tyre chips are more effective in damping. |
author2 |
Leong Eng Choon |
author_facet |
Leong Eng Choon Tay, Clara Hui Xia |
format |
Final Year Project |
author |
Tay, Clara Hui Xia |
author_sort |
Tay, Clara Hui Xia |
title |
Damping properties of sand-rubber mixtures |
title_short |
Damping properties of sand-rubber mixtures |
title_full |
Damping properties of sand-rubber mixtures |
title_fullStr |
Damping properties of sand-rubber mixtures |
title_full_unstemmed |
Damping properties of sand-rubber mixtures |
title_sort |
damping properties of sand-rubber mixtures |
publishDate |
2017 |
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http://hdl.handle.net/10356/70768 |
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1759856639926599680 |