Agus Taufik Mulyono

Developing the elastic modulus measurement of asphalt concrete using the compressive strength test

Elastic modulus is a fundamental property of an asphalt mixture. An analytical method of the elastic modulus is needed to determine the thickness of flexible pavement. It has a role as one of the input values on a stress-strain analysis in the finite element method. The aim of this study was to develop the measurement of the elastic modulus by using compressive strength testing. This research used a set of specimen mold tool and Delta Dimensi software to record strain changes occurring in the proving ring of compression machine and the specimens. The elastic modulus of the five types of aggregate gradation and 2 types of asphalt were measured at optimum asphalt content. Asphalt Cement 60/70 and Elastomer Modified Asphalt (EMA) were used as a binder. Manufacturing success indicators of the specimens used void-in-the-mix (VIM) 3-5 % criteria. The success rate of the specimen manufacturing was more than 76%. Thus, the procedure and the compressive strength test equipment could be used for the measurement of the elastic modulus. The aggregate gradation and asphalt types significantly affected the elastic modulus of the asphalt concrete.Elastic modulus is a fundamental property of an asphalt mixture. An analytical method of the elastic modulus is needed to determine the thickness of flexible pavement. It has a role as one of the input values on a stress-strain analysis in the finite element method. The aim of this study was to develop the measurement of the elastic modulus by using compressive strength testing. This research used a set of specimen mold tool and Delta Dimensi software to record strain changes occurring in the proving ring of compression machine and the specimens. The elastic modulus of the five types of aggregate gradation and 2 types of asphalt were measured at optimum asphalt content. Asphalt Cement 60/70 and Elastomer Modified Asphalt (EMA) were used as a binder. Manufacturing success indicators of the specimens used void-in-the-mix (VIM) 3-5 % criteria. The success rate of the specimen manufacturing was more than 76%. Thus, the procedure and the compressive strength test equipment could be used for the measurement of ...

MODEL PERANGKAT LUNAK MONITORING DAN EVALUASI IMPLEMENTASI STANDAR MUTU JALAN DAERAH

One of the root problems causing early damages on provincial and district roads is road administrators’ and developers’ low compliance against the road standards. To deal with this issue, a systemic logic model has been developed to facilitate the monitoring and the evaluation analyses of road standards implementation. The model was written in Java Runtime Environment version 6 and designed to feature portability, acceptability, applicability, and useability. The model was developed based on expert survey and typology analysis to gather and select the determining variables and their indicators.Model application in the case of SNI 03-2853-1992 (guidelines on constructing road foundation using crushed stones) implementation is demonstrated in this paper. The results showed 58.50% of the sample “own” the standard, 61.18% “understand” the standard, 60.52% “implement” the standard, 51.39% “oversee” the implementation of the standard, and therefore the overall implementation score for the said standard was 59.08%. The model developed in this study has the potentials to provide recommendations to road administrators on whether or not a standard needs revision or even abolition. Keywords: evaluation, monitoring, quality standard, provincial and local roads