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From: ceoffice@iitm.ac.in <ceoffice@iitm.ac.in>
Date: Wed, May 22, 2019 at 11:40 AM
Subject: [Seminars] [Seminars by Research Proposals]Dynamic Characterization of Sand-Rubber Tire Shred Mixtures for Seismic Base Isolation of Low-Rise Buildings
To: <seminars@list.iitm.ac.in>
From: ceoffice@iitm.ac.in <ceoffice@iitm.ac.in>
Date: Wed, May 22, 2019 at 11:40 AM
Subject: [Seminars] [Seminars by Research Proposals]Dynamic Characterization of Sand-Rubber Tire Shred Mixtures for Seismic Base Isolation of Low-Rise Buildings
To: <seminars@list.iitm.ac.in>
Research Proposal Seminar Talk
| Title: | Dynamic Characterization of Sand-Rubber Tire Shred Mixtures for Seismic Base Isolation of Low-Rise Buildings |
| Date/Time: | 27-05-2019 4:00 pm |
| Venue: | BSB 128, VSH (Visveswaraya Seminar Hall) - Ground Floor |
| Speaker: | Mr. B. R. Madhusudhan, Ph.D Scholar, (Roll No. CE14D201) |
Abstract:
Sand-rubber mixtures have gained recent research importance for their various engineering applications. One such application could be as seismic base isolation materials for low-rise buildings. The present study deals with the dynamic characterization of sand-rubber tire shred mixtures. The rubber tire shreds of fine size are mixed with river sand used for construction purposes in various controlled proportions and tested under dense conditions. The engineering properties viz., shear strength, compressibility, permeability and the dynamic response of the mixtures in large strain range are determined. A series of strain-controlled consolidated undrained monotonic triaxial shear tests, monotonic direct shear tests, strain-controlled dynamic triaxial tests under undrained conditions, one-dimensional compression tests , permeability tests are performed under fully saturated and dry conditions in this regard. The brittleness index which is a measure of ductility and the energy absorption capacity is also discussed. The contact angle of sand-water and the rubber-water interfaces determined using Goniometer are used to explain the intriguing findings from permeability tests. In addition, this study proposes an appropriate method to find the angle of repose of dry sand-rubber tire shred mixtures. The angle of repose of the mixtures is compared with the angles of internal friction obtained from triaxial shear and direct shear tests. From the results of the experimental investigations, it is found that sand-rubber tire shred mixtures show satisfactory static and dynamic properties required for seismic isolation of low-rise buildings.
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