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Title |
Evaluation of Physical Properties of Bottom Ash Aggregates Dry-Produced for Concrete
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Authors |
하정수(Jung-Soo Ha) ; 양근혁(Keun-Hyeok Yang) ; 안태호(Tae-Ho Ahn) |
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DOI |
https://doi.org/10.4334/JKCI.2021.33.2.133 |
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Keywords |
바텀애시; 경량골재; 물리적 특성; 구속 압축강도; 공극 bottom ash; lightweight aggregates; physical properties; confined compressive strength; porosity |
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Abstract |
The objective of this study is to examine the physical properties of bottom ash aggregates dry produced for concrete, comparing them to those of artificial lightweight and natural aggregates wherever possible. The tested properties include particle distribution curve, density, absorption, unit weight, solid volume, and porosity. The confined compressive strength of aggregates was assessed with respect to their solid-porosity ratios. Bottom ash particles need to be sorted by size and adequately blended to achieve the standard particle distribution curves. The solid volume can be selected as a critical parameter to determine the ten percent fines value (TFV), which represents the crushing resistance of aggregates. From a regression analysis using test data as a function of solid-porosity ratios, the confined compressive strength of bottom ash aggregates was estimated at 22.87 MPa, indicating a slightly higher strength than that of artificial lightweight aggregates (17.66 MPa) but lower value than that of natural aggregates.
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