strctural number (SN) minimum perkerasan jalan

BATAS KEKUATAN MINIMUM PERKIRAAN STRUKTUR PERKERASAN JALAN: KERANGKA PIKIR ANALISIS DAN APLIKASINYA  

Deterioration of road is not avoided. To preserve the minimum service level of road was performed by maintenance treatment. One in many obstacles in pavement management system was insufficiency of budget. 

The consequences were raised such as both of the minimum service level and the design life time were not reached in sometimes. Several efforts have been accomplished to optimize maintenance treatment of road, but there were none specifically to evaluate whether the damage road was reasonable to treat with maintenance or not by considering of the SN_min , SN_act and SN_load aspect.  SN_min is defined as the structural number value of the road after received  cumulative average annual dump truck (CAADT) in ESAL and undergone the serviceability loss (DPSI), and the other, SN_act is defined as the value of structural number that founded from field. This study  aims to estimate the DED characteristics-based SN_min threshold. Additionally, SN_load is found by trial and error approach in which SN_load value was determined when the Log(W₁₈) design was equal to Log(W₁₈) load (LogW_18rdesign - LogW_18load = 0). While, the SN_min was formulated by SN_design-SN_load. The assumptions were used at this study: no overloading, the drainage system was very good and no disaster. Data used at this study was the 2^nd Class of JN in Indonesia.  The study resulted in the SN_min =3,477 at the end of 1^st year and the SN_min = 2,129 at the end of design service life. By comparing the SN_min and SN_actual the damage road will be able classified whether fail or not. SN_actual < SN_min  criterion is categorized  as failure and not failure if  SN_actual ≥ SN_min. For the failed road criterion is suggested not necessary to carry out maintenance treatment and vice versa.

Keywords: damage road, minimum structural number, actual structural number and failure