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자료유형
학술저널
저자정보
저널정보
한국농공학회 한국농공학회논문집 한국농공학회논문집 제60권 제6호
발행연도
2018.1
수록면
111 - 119 (9page)

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The air-void is known to be one of the influencing factors for estimating long-term performance of asphalt concrete. Most of all, confirming air voidor density of pavement layer is important for quality control of field compaction level of asphalt concrete pavement. In this study, a non-nuclear typenon-destructive density gage (NDDG) was used to estimate compacted air-voids of asphalt pavement as a non-destructive test method. Asphalt concreteslab specimens were prepared using 6 types of asphalt mixes in laboratory (lab) for lab NDDG test. Four different base structure materials were usedto find out if there were any differences due to the type of base structure materials. The actual air-voids and NDDG air-voids were measured from6 asphalt concrete slabs. Four sections of field asphalt pavements were tested using the NDDG, and actual air voids were also measured from fieldcores taken from the site where the NDDG air-void was measured. From lab and field experimental tests, it was found that the air-voids obtained byNDDG were not the same as the actual air-voids measured from the asphalt concrete specimen. However, it was possible to estimate air voids basedon the relationship obtained from regression analysis between actual and NDDG air voids. The predicted air-voids based on the NDDG air-voidsobtained from 50mm depth were found to be reliable levels with R2≒0.9. Therefore, it was concluded that the air-voids obtained from NDDG couldbe used to estimate actual air-voids in the field asphalt pavement with a relatively high coefficient of determination.

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