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The objective of this study is to investigate the correlation between the chemical properties of bio-oil form different sources on its road performance of asphalt binder. In this study, the bio-oil from the rapid pyrolysis of corn stalks with different states was chosen to prepare bio-asphalt binder. The SARA Four-component test and Gel Permeation Chromatography test were conducted to analyze the chemical properties of bio-asphalt binder, and the correlation between group components, molecular weight distribution and conventional road performance of bio-asphalt binder was established based on grey relation theory. The results show that the bio-oils mainly increase the content of small molecular components (M<1000) in asphalt binder, decrease the average molecular weight, and improve the polydispersity. The asphaltene content mainly determines the temperature sensitivity of asphalt binder, the resin affects the low-temperature performance indexes such as ductility and brittle point, while the saturation and aromatic mainly affect the viscoelastic properties. The average molecular weight of bioasphalt affects its macro performance, and the polydispersity has a significant effect on the high-temperature stability. Finally, semi-liquid bio-oil, which is the mid-layer product of rapid pyrolysis of corn stalks, is recommended as the reasonable raw material for the preparation of bio-asphalt binder., Part of ISBN 9781032480923QC 20240718

Pada tahun 2021, Bakauheni Harbour City (BHC) ditetapkan sebagai Proyek Strategis Nasional, kondisi kawasan berupa pemukiman jarang, ruang hijau, area wisata Siger, dan terjadi kemacetan pada hari puncak. Tujuan penelitian ini mengetahui pengaruh pembangunan BHC terhadap kinerja Jalan Utama Pelabuhan Bakauheni (JUT), Jalan tol trans Sumatera (JTT), Jalan lintas tengah (JLE), Jalan lintas timur (JLT), Jalan lingkungan permukiman (JLP), dan Jalan kawasan pelabuhan (JKP). Metode penelitian dengan pemodelan bangkitan tarikan BHC dan kinerja jalan JUT, JLT, JLE, JTT, JLP, JKP pada kondisi arus normal dan puncak, ditentukan pada sebelum pembangunan BHC (2021), persiapan (2022), semasa (2023), selesai (2043), fungsional (2047), ultimate/puncak (2073). Berdasarkan analisa diperoleh bangkitan tarikan BHC 17.470 smp/hari. Dengan variabel terikat Y (JUT) dan variabel bebas X1(JBHC), X2 (JTT), X3 (JLT), X4 (JLE), X5 (JKP), X6 (JLP), dengan metode analisa regresi, didapatkan korelasi dampak pembangunan BHC terhadap kinerja jalan sangat kuat (nilai pearson correlation = 0,954). Model regresi menghasilkan persamaan Y= 0,007 + 0,172X1 + 0,378X2 + 1,273X3 + 0,378X4 - 2,821X5 + 0,979X6 (kondisi arus normal), dan Y= 4,007+0,377X10,989X2+4,975X3+1,307X4-0,649X5-10,060X6 (kondisi arus puncak). Dapat disimpulkan bahwa pembangunan BHC berkonstribusi signifikan terhadap kinerja JUT sebesar 0,172 (normal) dan 0,377 (puncak) satuan ratio, sehingga meningkatkan tundaan dan kemacetan.

As a kind of solid waste, using Prestressed High-Strength Concrete Pile Waste Concrete (PPWC) as the replacement for limestone filler in asphalt concrete can not only reduce the accumulation of PPWC and increase its utilization but also avoid the increased road construction costs and environmental degradation associated with limestone mining. This study aims to investigate the effect of using PPWC filler to replace limestone filler on the road performance of asphalt concrete. Firstly, PPWC was ground into filler particles with a diameter less than 0.075 mm. The particle characteristics such as surface morphology, particle size distribution and chemical composition of PPWC filler and limestone filler were compared. Then, PPWC filler was used to replace limestone filler with different volume fractions to prepare asphalt concrete, and the water damage resistance, high-temperature rutting resistance, low-temperature crack resistance, fatigue resistance and adhesion performance of asphalt concrete were tested. The results showed that PPWC filler has a smaller particle size and rougher surface than limestone filler, and it contains Ca(OH)2 produced by hydration. The addition of PPWC filler can effectively improve the mechanical properties of asphalt concrete without reducing its water damage resistance. PPWC filler can improve the high-temperature rutting resistance and low-temperature crack resistance of asphalt concrete, but reduce its low-temperature fatigue resistance. The low content of PPWC filler will enhance the adhesion between asphalt mortar and aggregate. However, when the content of PPWC filler exceeds 50%, Ca (OH)2 in PPWC will reduce the adhesion between acid asphalt mortar and alkaline basalt aggregate. Therefore, the use of PPWC as filler in asphalt mixtures provides a reliable solution for the sustainable development of road materials., Materials and Environment

Transportation has an important role in people's lives, where the rate of population growth is getting higher, which results in an increase in people's need for transportation. This can increase the use of public transport transportation; this problem is closely related to the traffic flow network, especially in the city of Makassar in the Tamalanrea sub-district. The application of the feeder transport line in the city of Makassar is one form of solution to the problems that occur in the city of Makassar, namely the traffic flow network. Based on the results of the planning of the Feeder Transport Route Model, the route that has been researched can be a solution to reduce congestion on the main road, where public transportation types Metromini can be diverted to local routes with planned routes and road types, which can meet the type of public transport Metromini. For public perception, it is more dominant to agree if the feeder system is implemented in Makassar. The purpose of this study was to determine the performance of feeder transport if applied in the city of Makassar. It can be seen from the number of conflicts that have occurred due to the increasing number of public transport vehicles on the main roads of the city of Makassar.

The special environment conditions in high altitude areas leads to serious cracking and peeling of road hot-melt marking coatings. In order to improve the durability of marking paint, a durable hot-melt marking paint was designed by modifying the paint with toughening-agent, rheological agent, and anti-aging agent. The modification mechanism of the modified coating was revealed through TG and FTIR analysis. The low-temperature anti cracking, adhesion, and anti-aging properties of the modified coating were studied by low-temperature bending test, interlaminar shear test and UV aging test. Besides this, the workability of modified coatings was tested onsite. The results showed that the mass loss rate of the rheological agent is 0.15% at 240 °C, the modified coating had good thermal stability within the mixing temperature range of the coating. There was no chemical change between the modifier and the coating, which was a physical blend. The modified marking paint had good fluidity, softening point and drying time, but its compressive strength was slightly reduced. With the increase of the content of the toughener, the low temperature crack resistance and adhesion of the marking coating gradually increase. When the toughener is 5%, the flexural tensile strain of the marking coating beam increased by 79.1%, and the adhesion strength of asphalt concrete increased by 53.4%. The anti-aging agent can shield most of the UV radiation and improve the anti-aging property of the coating by about 30%. The field process validation achieved the expected results. The modifier coating has excellent low temperature crack resistance, adhesion, UV aging resistance, and other properties, and has good application prospects in harsh environment areas., Pavement Engineering

To purify severe air pollution in traffic-intensive urban areas and tunnels, an innovative type of photocatalytic micro-surfacing mixture (PMM) was designed, which was enhanced by polypropylene (PP) fiber and nano-TiO2. In this work, the road performance of sixteen PMMs with the different contents of PP and nano-TiO2 were evaluated by wet-track abrasion test, wheel rutting deformation test and low-temperature splitting test. The vehicle exhaust (VE) gas degradation capacity of sixteen PMMs was characterized under ultraviolet (UV) light and visible light conditions. The life cycle assessment (LCA) methodology was applied to evaluate the environmental impact of PMM. The results showed that the road performances of PMM were improved with the increase of the PP fibers amount. The VE gas degradation capacity was significantly enhanced with the increase of nano-TiO2 amount. PMM with 0.2 wt% PP fibers and 60 wt% replacement of mineral filler with nano-TiO2 was a viable alternative to improve photocatalytic degradation of VE in pavement engineering. In addition, the modified micro-surfacing mixture facilitates a significant reduction in energy consumption and greenhouse gas emissions., Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public., Pavement Engineering