Damping property of prepacked concrete incorporating coarse aggregates coated with polyurethane. (October 2018)

• Record Type: Journal Article
• Authors: Lee, Kang Seok; Choi, Jeong-Il; Park, Se Eon; Hwang, Jae-Seung; Lee, Bang Yeon
• Is Part Of: Cement & concrete composites. Volume 93(2018)
• Page Start: 301
• Page End: 308
• Publication Date: 2018-10
• Subjects: Concrete -- Damping -- Polyurethane -- Preplaced aggregate; Composite-reinforced concrete -- Periodicals; Concrete -- Periodicals; Composite materials -- Periodicals; Composites de ciment -- Périodiques; Béton -- Périodiques; Composites -- Périodiques; Béton léger -- Périodiques; Cement composites; Composite materials; Composite-reinforced concrete; Concrete; Lightweight concrete; Periodicals; Electronic journals; 620.135
• DOI: 10.1016/j.cemconcomp.2018.06.018
• Languages: English
• ISSNs: 0958-9465

Abstract

Abstract: This study proposes a new prepacked concrete incorporating coarse aggregates coated with polyurethane with high damping and investigates the mechanical properties and damping ratio of the proposed concrete. Two types of prepacked concretes, in this case new prepacked concrete produced with the materials and manufacturing process as proposed here and normal prepacked concrete were prepared. A series of experiments focusing on the density, strength, and impact test results of small-scale specimens and beam specimens as well as a modal analysis of a simply-supported beam were conducted in an effort to characterize the mechanical and damping properties of the new prepacked concrete. The test results showed that the damping ratio of the new prepacked concrete was as high as 10% in the range of 10 Hz to 200 Hz, which is approximately 10 times higher than that of normal prepacked concrete, with a decrease in the mechanical properties.