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ASU
Professor Working On
Noise-Absorbing Spray
Dr.
Han Zhu updated participants at the First International Asphalt Rubber
Symposium on the status of a new rubberized coating material that can be
sprayed on sound barrier walls to help eliminate noise from busy city roads
and highways.
Currently, Dr. Zhu is testing mixtures
using #4 mesh and larger crumb rubber particles and a bonding material
to determine the optimum formulation for the spray applied material. The
key characteristics he seeks are resistance to oxidation, ease in application,
durability, sound absorption, and cost effectiveness. ASU's Material's
Lab is testing the rubberized spray for to determine the materials resistance
to ultraviolet, infrared and thermal radiation sources.
Dr. Zhu is also working on spray
equipment that will keep the rubber mixed or in suspension during application
and be able to apply large quantities in a short time.
For more information contact Dr.
Zhu (602) 965-2745.
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