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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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