Resonant Column Tests on Mixtures of Different Sands with Coarse Tyre Rubber Chips
- The dynamic behaviour of unsaturated sand rubber chips mixtures at various gravimetric contents is evaluated through an experimental study comprising resonant column tests in a fixed-free device. Chips were irregularly shaped with dimensions ranging from 5 to 14 mm. Three types of sand with different gradation have been considered. Relative density amounted to 0.5 for all specimens. Due to the large size of the chips, the diameter of the specimens had to be equal to 100 mm, which in turn required a re-calibration of the device assuming a frequency-dependent drive head inertia. The effects of confining stress, rubber chips content, and sand gradation on shear modulus and damping ratio are determined over wide ranges of the shear strain. At small strains, as known for sands, increasing the confining stress stiffens the mixtures. Increasing the rubber chips content reduces significantly the shear modulus and increases the damping ratio. At higher strains, increasing the confining stress or the rubber content flattens the reduction of the shear modulus with strain. Damping at high strains does not show any appreciable dependence on rubber content. Unloading–reloading sequences are used to assess shear modulus degradation and threshold strains. Finally, design equations are derived from the test results to predict the dynamic response of the composite material.
Author: | Gerard Banzibaganye, Christos VrettosORCiD |
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URN: | urn:nbn:de:hbz:386-kluedo-79010 |
DOI: | https://doi.org/10.1007/s10706-022-02244-0 |
ISSN: | 1573-1529 |
Parent Title (English): | Geotechnical and Geological Engineering |
Publisher: | Springer Nature - Springer |
Document Type: | Article |
Language of publication: | English |
Date of Publication (online): | 2024/03/27 |
Year of first Publication: | 2022 |
Publishing Institution: | Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau |
Date of the Publication (Server): | 2024/03/27 |
Issue: | 40 |
Page Number: | 14 |
First Page: | 5725 |
Last Page: | 5738 |
Source: | https://link.springer.com/article/10.1007/s10706-022-02244-0 |
Faculties / Organisational entities: | Kaiserslautern - Fachbereich Bauingenieurwesen |
DDC-Cassification: | 6 Technik, Medizin, angewandte Wissenschaften / 624 Ingenieurbau und Umwelttechnik |
Collections: | Open-Access-Publikationsfonds |
Licence (German): | Zweitveröffentlichung |