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Item Information   Holdings       More by this author     Helmin, Jessica     Subjects     Tires, Rubber -- Recycling.     Concrete -- Additives     Aggregates (Building materials) -- Testing     MSST Project.     Browse Catalog     by author:      Helmin, Jessica       by title:      Crumb-rubber as a su...         MARC Display

Crumb-rubber as a substitute aggregate in concrete / Jessica Helmin. by Helmin, Jessica Subjects Tires, Rubber -- Recycling.   Concrete -- Additives   Aggregates (Building materials) -- Testing   MSST Project. Description:  54 leaves : ill. ; 29 cm. Contents:  Thesis advisor: Dr. Douglas Stahl Committee members: Dr. Carol Diggelman, Christopher Raebel Introduction and project goals -- Literature review -- Hypothesis and objectives -- Experimental setup -- Results -- Conclusion -- References -- A: Mix design spreadsheet. Waste rubber tires are the most illegally disposed of solid waste in the country. Stockpiles of waste rubber tires are hazardous to the environment and to human health. Tire fires are the biggest concern because of the toxic fumes that are released from burning rubber tires and the difficulty of putting out tire fires. Using crumb rubber particles from recycled waste tires could benefit the environment and construction industry. This project analyzes the use of crumb rubber particles in concrete. Multiple mixes varying the size and amount by volume of crumb rubber particles were tested for compressive strength, flexural strength, and freeze-thaw effects. The experiment showed that compressive strength and flexural strength decrease as the amount of crumb rubber increases. Further, the modulus of elasticity also decreased with an increase of crumb rubber. The freeze-thaw cycles had no discernible effect on the concrete; these cylinders showed the same relationship of strength to crumb rubber content as the non-freeze-thaw cylinders. Because of the decrease in strength, crumb rubber concrete may be most appropriate for non-structural applications such as sidewalks, road barriers and sound barriers. Further investigation could be done on the bonding between the rubber particles and concrete as well as the impact strength of crumb rubber concrete.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .H455 2010 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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