Manufacturing artificial lightweight aggregates using coal bottom ash and its application to the lightweight-concretes

Kangduk Kim (김강덕); KANG SEUNG GU (강승구)

Manufacturing artificial lightweight aggregates using coal bottom ash and its application to the lightweight-concretes

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2008, 18(5), pp.211-216
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering

Kangduk Kim ¹, KANG SEUNG GU ¹

¹경기대학교

Accredited

ABSTRACT

The artificial lightweight aggregate (ALA) was manufactured in a rotary kiln at 1125℃ using green body formed by pelletizing the batch powder composing of coal bottom ash (CBA) produced from power plant, clay and dredged soil (DS). The TCLP (Toxicity characteristic leaching procedure) results showed that the dissolution concentration of heavy metal ions of ALA fabricated in this study was below the limitation defined by the enforcement regulations of wastes management law in Korea. The ALA containing 60~70 wt% CBA had a bulk density of 1.45~1.49 and a water absorption of 17.2~18.5 %. The impact values for oven-dry state and saturated-surface dry state of ALA were 27.4 ± 1.3 and 23.4 ± 2.6 % respectively. The 28-days compressive strength of concrete made with various ALA was 22.7~27.8 N/mm². The slump of concrete with ALA containing CBA 60 and 70 wt% were 7.9 and 14.3 cm respectively. The unit weight of concrete made with any ALA fabricated in this study was satisfied with the standard specifications of lightweight concrete for the civil engineering and construction presented by Korea as below 1.84 ton/m³.

KEYWORDS

Artificial lightweight aggregates, Coal bottom ash, Dredged soil, Lightweight concrete, Impact value

Citation status

* References for papers published after 2023 are currently being built.

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Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19