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Kim, Jae Hong
Research Group for Concrete Structures and Materials
Research Interests
  • Mechanics of Concrete, Rheology, Structural Analysis, Construction Performance
  • Rheological investigation for the flow of fresh concrete
  • Multiscale material characterization of suspension

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Lightweight Concrete Produced Using a Two-Stage Casting Process

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Title
Lightweight Concrete Produced Using a Two-Stage Casting Process
Author
Yoon, Jin YoungKim, Jae HongHwang, Yoon YiShin, Dong Kyu
Issue Date
2015-04
Publisher
MDPI AG
Citation
MATERIALS, v.8, no.4, pp.1384 - 1397
Abstract
The type of lightweight aggregate and its volume fraction in a mix determine the density of lightweight concrete. Minimizing the density obviously requires a higher volume fraction, but this usually causes aggregates segregation in a conventional mixing process. This paper proposes a two-stage casting process to produce a lightweight concrete. This process involves placing lightweight aggregates in a frame and then filling in the remaining interstitial voids with cementitious grout. The casting process results in the lowest density of lightweight concrete, which consequently has low compressive strength. The irregularly shaped aggregates compensate for the weak point in terms of strength while the round-shape aggregates provide a strength of 20 MPa. Therefore, the proposed casting process can be applied for manufacturing non-structural elements and structural composites requiring a very low density and a strength of at most 20 MPa
URI
https://scholarworks.unist.ac.kr/handle/201301/17397
URL
http://www.mdpi.com/1996-1944/8/4/1384
DOI
10.3390/ma8041384
ISSN
1996-1944
Appears in Collections:
UEE_Journal Papers
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