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Dynamic properties of tire-derived aggregate concrete

Rubberized concrete has potential applications as a high-energy absorbent material. Existing literature indicates that replacement of conventional aggregates with rubber may reduce the brittleness of the concrete. In addition, application of alternative aggregates, such as recycled tire-derived aggregates and expanded shale aggregates, can also contribute to the sustainability of concrete products. This study is an experimental investigation of the dynamic behavior and performance of rubberized lightweight aggregate concrete. These investigations included specimens containing tire-derived aggregates and expanded shale aggregates, with a 4-to-1 volume ratio. Further, the effect of polypropylene fibers on dynamic properties of concrete has also been investigated. Dynamic testing involves measurement of material characteristics, such as, damping, toughness, resilience and ductility for compressive and flexural specimens subjected to impact loads. The results of this study contribute to better understanding of the performance of proposed materials, i.e., fiber-reinforced concrete with rubberized-lightweight-aggregates, in applications involving impact loads.

Author(s):

Nazmieh Masswadi    
California State University, Fresno
United States

Nathan Miller    
Brooks Ransom Associates, Fresno, CA
United States

Fariborz Tehrani    
California State University, Fresno
United States