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Sustainability of Rubberized Concrete as
Name: Sustainability of Rubberized Concrete as
File: liu 05-16-16.pdf
Size(MB): 0.7MB
Extension: PDF
Speaker Name: Liu, R.
Managed by: sdickens
Date Uploaded: June 21, 2016; 9:09 am
Download Count: 373
Downloads This Month: 373

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At the end of 2009, about 113.6 million scrap tires were stockpiled in the United States. This research examines the sustainability of recycled tire chips (1/4 in-1 1/2 in) as coarse aggregate in concrete mixtures for highway pavement. Fresh and hardened concrete properties (e.g. air content, compressive strength, permeability, and resistance to freeze-thaw cycling) were tested for mixtures with 100%, 50%, 30%, 20%, and 10% (volume) of coarse aggregate replaced by tire chips. The mixture with 10% coarse aggregate replaced by tire chips had the best performance. The air content reached 6%. Workability was comparable to the control mixture. At 28 days of age, the compressive strength exceeded 4200 psi. In addition, the mixture had moderate permeability and high freeze-thaw durability factor. A regional life cycle assessment model considering the impacts of scrap tire stockpiles is utilized to evaluate the economic and environmental sustainability of rubberized concrete mixture with 10% tire chips. Although the direct economic benefit is low, the indirect environmental cost saving indicates a promise of developing rubberized concrete as highway pavement construction material.

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