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http://dx.doi.org/10.12652/Ksce.2022.42.4.0449

Development of a Lightweight Construction Material Using Hollow Glass Microspheres  

Lee, Nankyoung (Seoul National University)
Moon, Juhyuk (Seoul National University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.42, no.4, 2022 , pp. 449-455 More about this Journal
Abstract
Concrete is the most widely used construction material. The heavy self-weight of concrete may offer an advantage when developing high compressive strength and good dimensional stability. However, it is limited in the construction of super-long bridges or very high skyscrapers owing to the substantially increased self-weight of the structure. For developing lightweight concrete, various lightweight aggregates have typically been utilized. However, due to the porous characteristics of lightweight aggregates, the strength at the composite level is generally decreased. To overcome this intrinsic limitation, this study aims to develop a construction material that satisfies both lightweight and high strength requirements. The developed cementitious composite was manufactured based on a high volume usage of hollow glass microspheres in a matrix with a low water-to-cement ratio. Regardless of the tested hollow glass microspheres from among four different types, compressive strength outcomes of more than 60 MPa and 80 MPa with a density of 1.7 g/cm3 were experimentally confirmed under ambient and high-temperature curing, respectively.
Keywords
Lightweight aggregate; Lightweight concrete; Cementitious composites; Hollow glass microsphere;
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