A Study on the Spreadability Characteristics of Asphalt Concrete Pavement using Dynaflect

DYNAFLECT에 의한 아스팔트 콘크리트 포장도로의 분산도 특성에 관한 연구

Dynaflect is known as a very effective equipment for the structural evaluation and rehabilitation of Pavements. It is increasingly used in the design, construction and maintenance of the various pavement structures. In this study, two-layered asphalt concrete pavements with the various moduli and thicknesses are selected as the analytical models. The deflections on the surface corresponding to sensor positions of Dynaflect are analyzed utilizing the multi-layered elastic computer program. From the study of the characteristics of spreadability (SPR), it is found that the SPRs are unique when the moduli ratio of pavements EIIE2 are identical. It is also found that the SPR has a linear relationship with the logarithm of moduli ratio ElIE2 in the range of 1.0 to 50. The regression equation to predict the moduli ratio ElyE2 from the SPR and the pavement taickness h is proposed. A series of charts to estimate the elastic moduli of two-layered asphalt concrete pavement system are also developed.

도로포장의 구조평가 및 유지관리를 위하여 매우 효율적인 장비로 알려진 Dynaflect의 이용이 날 로 증가하고 있어, 이에 대한 연구가 절실하다. 따라서 본 연구에서는 도로포장에 사용되는 재료의 탄성계수에 따른 해석모질을 설정하고, 이를 다층토 이론에 근거한 콤퓨터 프로그램을 통하여 Dyn select의 처짐곡선을 산출함으로써 표층 두께와 탄성계수에 따른 분산도의 특성을 연구하였다.