KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Investigation on the Repeatability of Modified Proctor Test for Roller Compacted Concrete Pavement

롤러 전압 콘크리트 포장을 위한 수정다짐시험의 반복재현성 고찰

  • 황석희 (강릉원주대학교 토목공학과 대학원) ;
  • ;
  • 홍성재 (강릉원주대학교 토목공학과) ;
  • 이승우 (강릉원주대학교 토목공학과)
  • Received : 2015.03.02
  • Accepted : 2015.06.22
  • Published : 2015.08.01
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Abstract

Roller Compacted Concrete Pavement (RCCP), is a type of pavement using compaction roller and asphalt finisher on concrete mixture that contains low amount of water. RCCP strength and durability are greatly affected by compaction level. Quality control is performed by ensuring the degree of compaction at site based on dry density. In the field, Modified Proctor Test is used in order to obtain optimum dry density. However, there is no clear compaction curve analysis criteria of Modified Proctor Test for RCCP. In this study, compaction curve built by three samples of Modified Proctor Test was produced and it was used to compare with compaction curve contented lower number of samples (one and two samples) in order to analyze their reliability. Thus, a conclusion was drawn from the results; by comparing to the result from Modified Proctor Test of three samples, the use of two samples represented result with only 0.5% of error which means the reliability is 99.5%.

롤러전압콘크리트(Roller Compacted Concrete Pavement, RCCP) 공법은 적은 단위수량이 포함된 콘크리트 혼합물을 아스팔트 피니셔와 다짐 롤러를 이용하여 시공하는 공법이다. RCCP는 다짐 수준에 따라 강도 및 내구성에 많은 영향을 받게 된다. 또한 품질관리는 건조밀도를 기준으로 다짐도 관리를 시행하고 있다. 현장에서 최적의 건조단위중량을 모사하기 위해 수정다짐시험을 실시한다. 그러나 RCCP를 위한 수정다짐시험의 다짐곡선 분석에 명확한 기준이 제시되어 있지 않다. 본 연구에서는 함수비당 세 개의 샘플에 의한 수정다짐곡선의 기준을 설정하고 설정된 다짐곡선과 비교하여 더 적은실험횟수와의 신뢰성을 분석하기 위해 반복재현성을 고찰하였다. 이로 인해 세 번의 실험에 의한 수정다짐시험과 비교하여 두 번의 수정다짐시험은 0.5% 오차가 발생되며 신뢰도는 99.5% 이다.

Keywords

References

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