Abstract The ballast layer is part of the conventional railway track structure widely used in Indonesia due to its ease maintenance, construction simplicity, and lower costs compared slab technology. This study models four types test specimens, including use scrap tire rubber bitumen materials. were added at proportions 10% 3%, respectively, using a compression method measure deformation, abrasion, elastic modulus. results showed that modified with had lowest stiffness value other three...

One of the major problems with landfills is that they contain a large amount solid wastes. Waste plastics and glasses contribute greatly to this problem, these materials need be managed or recycled extend life landfill sites. Hence, study was conducted investigate feasibility using waste in asphalt mixtures for pavement applications. Various types were selected mix containing designed by Marshall method. Three glass used: bottle glass, liquid-crystal display (LCD) sheet glass. In terms total...

The incorporation of natural fibers into concrete has recently emerged as a popular approach in the field construction materials due to its sustainability and environmental friendliness. In comparison artificial fibers, are more cost-effective widely available globally. Among various coconut fiber (CF) stands out for unique set advantages. This study aims investigate mechanical properties durability coconut-fiber-reinforced self-healing (CFR-SHC) context corrosion resistance. Additionally,...

Abstract This paper briefly presents the experience of Center for Regional Energy Management in needs assessment, capacity building and adoption household biogas plants rural areas Yogyakarta over past five years. The program has been designed to solve specific energy provision problems areas, such as securing cooking fuel, well promote ecological farming by using digester organic manure, thereby efficiently recycling locally available biomass waste. also points that realizing these goals...

Airports play a critical role in transporting goods and passengers supporting the growth of world economy. spend huge sums annually to maintain improve pavement functions by expanding runways, taxiways, aprons, perform routine maintenance rehabilitation existing pavements. Besides traditional direct costs, comprehensive airport management system should also consider indirect costs such as fuel, crew, passenger delay, aircraft maintenance, loss revenue when conducting life-cycle cost analysis...

One of the complex processes in spectral analysis surface waves (SASW) data is inversion procedure. An initial soil profile needs to be assumed at beginning analysis, which involves calculating theoretical dispersion curve. If assumption starting model not reasonably close, iteration process might lead nonconvergence or take too long converged. Automating procedure will allow us evaluate stiffness properties conveniently and rapidly by means SASW method. Multilayer perceptron (MLP), random...

The growth of the palm oil industry has resulted in an increase production solid waste, created from extraction fresh fruit bunches, which can take form boiler ash (POBA). POBA be used to modify asphalt binder and mixtures reduce harmful effect this waste on environment. objective each modification is strength, stiffness, durability, workability constructability while reducing environmental effects. This study examines physical chemical properties 60/70 penetration-grade binder, modified...

Under extreme environmental conditions, concrete is often damaged, ranging from cracking to destruction caused by corrosion of steel reinforcement. Damage must be repaired immediately prevent the wider spread corrosion. This study carried out grouting, jacketing, and self-healing repairs. Encapsulated Bacillus subtilis bacteria were used make concrete. The specimen was a reinforced (RC) beam measuring 62x15x15 cm damaged reinforcement in subjected accelerated with mass loss (corrosion...

Innovations in the field of railroad construction need to be improved, especially ballast layer which is an essential structure conventional railways. The purpose this study was analyse characteristics vertical deformation and material abrasion with 10% scrap rubber two types sizes (uniform graded) 3% asphalt. This uses a compressive test method six samples modeled boxes measuring 400 x 300 200 mm. results present that use can increase value significantly 84%. On other hand, asphalt minimize...

This paper employs an improved continuous wavelet transform (CWT) technique of Gaussian derivative function and impulse response filtering (IRF) in seismic surface wave analysis to improve data the Spectral Analysis Surface Wave (SASW) method. Two procedures were used: first, spectrum interest was chosen using a time–frequency spectrogram. Then, noisy distortions eliminated by utilizing filtering. The outcomes show that SASW method is able identify velocity which coincides with dynamic...

This study aims to investigate the engineering properties (i.e., physical, chemical, and adhesion properties) of bitumen incorporated with RH-Warm Mix Asphalt (RH-WMA) additive. Base a penetration grade 80/100 was added 3.0, 3.5, 4.0% RH-WMA (by total weight bitumen). The Response Surface Method (RSM) used determine optimum values base additive which meet specification softening point chosen as responses in design layout. Three solutions 3.04, 3.55 3.91% that were obtained from RSM analysis...

In pavement management systems, deflection basin tests, such as the Falling Weight Deflectometer test, are common techniques that widely used, while surface wave i.e. Spectral Analysis of Surface Wave is recently employed an alternative technique in evaluation and monitoring. this paper, performance both dynamic non-destructive tests on subgrade investigation presented. propagation between a set receivers was transformed into frequency domain using Fast Fourier Transform subsequently phase...

Road pavement is a structure that expose to various climate conditions. To make it more durable, modification of asphalt binder with polymer popular option. However, maintain the environmental sustainability, mixing and compaction temperature needs be reduced. Warm Mix Asphalt additive had been widely used for this purpose. In research, impact modified binder, PG76 together chemical WMA additive, Rediset on groundwater soil contamination was investigated. The effect in terms viscosity...

Non-destructive testing (NDT) has been developed as a effective tool in road evaluation system order to in-situ assess the stiffness parameter of pavement layer, partcularly conducting quick assessment on soil subgrade layer. The NDT method based seismic surface wave measurement recently and applied for material road-pavement, i.e. shear velocity, Poisson's ratio dynamic elastic modulus. In this paper, an improved technique tomography waves simultaneously anomalies soil-subgrade is...