대한토목학회논문집 (KSCE Journal of Civil and Environmental Engineering Research)

  • 제36권6호
  • /
  • Pages.1117-1123
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  • 2016
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  • 1015-6348(pISSN)
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  • 2799-9629(eISSN)
대한토목학회 (Korean Society of Civil Engeneers)
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포장용 롤러전압콘크리트의 다짐도와 압축강도의 상관관계 분석

Analysis of Relationship Between Compressive Strength and Compaction Ratio of Roller-Compacted Concrete Pavement

  • 투고 : 2015.10.26
  • 심사 : 2016.06.22
  • 발행 : 2016.12.01
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초록

롤러전압콘크리트포장 공법은 기존 시멘트 콘크리트 공법의 재료 특성 및 아스팔트 포장의 시공특성을 공유하는 포장 방식이다. 일반 시멘트 콘크리트 포장의 우수한 구조적 성능을 유지하면서, 아스팔트 시공 장비를 사용하여 간소한 시공절차로 경제성을 확보할 수 있다. 롤러전압콘크리트포장 공법은 수화반응과 롤러다짐에 의한 골재 맞물림 효과로 일반 시멘트 콘크리트 포장보다 적은 시멘트량을 사용하여도 충분한 강도를 발현할 수 있다. 또한 일반 시멘트 콘크리트 포장과 동등한 강도 특성을 발휘 할 수 있으며, 본 연구에서는 RCCP의 다짐도와 압축강도의 관계를 정량적으로 도출하고자 한다. 롤러전압콘크리트의 다짐에너지를 변화시키면서 다양한 다짐도를 갖는 시편을 제작하였다. 다짐도는 시편의 건조단위중량과 최대건조단위중량의 비로 정의하였으며, 다양한 다짐도로 성형된 시편의 28일 압축강도를 평가하였고, 다짐도에 따른 강도비의 관계를 도출 하였다. 따라서 롤러전압콘크리트 공법의 국내 현장적용을 위한 다짐도에 따른 강도비의 중요성을 부각하여 현장 다짐도 관리에 적용할 수 있을 것으로 판단된다.

Roller-Compacted Concrete Pavement (RCCP) is a type of pavement that shares conventional concrete pavement material characteristics and asphalt pavement construction characteristics. Even though RCCP is compacted in the same way and have similar aggregate gradation to asphalt pavements, its materials and structural performance properties are similar to those of conventional concrete pavement. With cement hydration and aggregate interlock, Roller-Compacted Concrete or RCC can provide strength properties equal to those of conventional concrete with low cement content. Therefore, compaction ratio of RCC can highly influence on its strength. In general, 95% of compaction ratio is required for proper strength development. RCC strength can be highly influenced by compaction energy which depends on compaction equipment and compaction method. Therefore, it is necessary to analyze the relationship between compressive strength and compaction ratio of RCC. RCCP specimens were produced at different compaction ratio by using different compaction methods and energies. The compaction ratio was defined by the ratio of the specimen's dry density and its maximum dry density. The maximum dry density was obtained from Modified Proctor test. 28 days compressive strength corresponding to each compaction ratio case was tested. Finally, the relationship between compressive strength and compaction ratio can be analyzed. For application of roller-compacted concrete in domestic construction site, the relationship is important for field compaction management.

키워드

참고문헌

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