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Title |
Evaluation on Mechanical Properties and Thermal Resistance of Lightweight Concrete Using Bottom Ash Aggregates and Expanded Polystyrene Bead
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Authors |
김종원(Jong-Won Kim) ; 양근혁(Keun-Hyeok Yang) ; 문주현(Ju-Hyun Mun) |
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DOI |
https://doi.org/10.4334/JKCI.2021.33.6.569 |
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Keywords |
바텀애시 골재; 스티로폼 비드; 역학적 특성; 열전도율 bottom ash aggregate; expanded polystyrene bead; mechanical properties; thermal conductivity |
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Abstract |
The objective of this study is to develop the lightweight insulating concrete using bottom ash (BA) aggregates and expanded polystyrene (EPS) bead. The main parameters investigated in the BA aggregate concrete were the volume fraction of EPS (0~15 %), addition of the polymer and polyvinyl alcohol fiber, and curing temperatures (20~60 °C). The polymer and polyvinyl alcohol fiber were used to maintain the workability and reduce the crack development in the tested concrete due to the addition of EPS bead. Empirical design models were proposed to reliably assess the compressive strength gain, splitting tensile strength, rupture modulus, and thermal conductivity of lightweight insulating concrete. From the test results and proposed models, it was recommended to add 5~10 % volume fraction of EPS bead for BA aggregate concrete to achieve the requirements specified in KS F 4736 for the extrusion lightweight concrete panels.
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