scholarly journals Reduction of Plastic Deformation in Heavy Traffic Intersections in Urban Areas

2021 ◽  
Vol 13 (7) ◽  
pp. 4002
Author(s):  
Seungbub Song ◽  
Chunho Yeom
Keyword(s):  
Plastic Deformation ◽  
Urban Areas ◽  
Performance Test ◽  
Raw Materials ◽  
Heavy Traffic ◽  
Test Body ◽  
Asphalt Mixtures ◽  
Traffic Intersections ◽  
Stone Mastic Asphalt ◽  
A Performance

This study aims to maximize the effects of reducing plastic deformation in heavy traffic intersections in urban areas by improving the aggregates and binders of asphalt mixtures in order to verify the strength effect of SMA (Stone Mastic Asphalt) mixtures compared with that of fluid-resistant asphalt mixtures. The authors examine the pavement performance and conduct an economic analysis for sustainable urban infrastructure. Additionally, to reduce plastic deformation, the study analyzed an improvement plan through experimental research based on the existing literature. First, we determined the mixing design specifications of the general asphalt fluid-resistant mixture and SMA mixture, which is known to reduce plastic deformation. Next, we confirmed the appropriateness of the raw materials and mixing design results. Finally, a performance test was conducted on plastic deformation resistance. A wheel tracking test was also conducted as a performance experiment. The test body—with a fiber grid reinforcing material installed in the SMA mixture—showed high dynamic stability, which was the most effective for reducing plastic deformation.

scholarly journals Valorization of vinasse as binder modifier in asphalt mixtures

DYNA ◽  
2015 ◽  
Vol 82 (194) ◽  
pp. 52-56
Author(s):  
MARIA JOSE MARTINEZ-ECHEVARRIA ROMERO ◽  
Gema García-Travé ◽  
Mª Carmen Rubio-Gámez ◽  
Fernando Moreno-Navarro ◽  
Domingo Pérez-Mira
Keyword(s):  
Plastic Deformation ◽  
Mechanical Performance ◽  
Raw Materials ◽  
Asphalt Mixtures ◽  
Industrial Processes ◽  
Construction Sector ◽  
Moisture Sensitivity ◽  
Asphalt Mixes ◽  
Technical Research ◽  
Different Types

The reutilization of waste generated by industrial processes has become a majorenvironmental objective in scientific and technical research. In the construction sector, there is a broad range of techniques for the exploitation of different types of waste, which can then be used as a replacement for raw materials. This paper presents the results of a study of vinasse, a by-product of biomass ethanol, andanalyzes its viability as a bitumen modifier in asphalt mixes. For this purpose, four AC-16S asphalt mixes were evaluated for moisture sensitivity, plastic deformation, stiffness, and fatigue. The mix formulas were the following: (Mix 1) 50/70 bitumen; (Mix 2) 50/70 bitumen modified with 10% vinasse; (Mix 3) rubber bitumen; (Mix 4) rubber bitumen modified with 10% vinasse. The results of this study showed that bitumen modified with vinasse improved the mechanical performance of the AC-16S mix and also contributed to the valorization of vinasse waste.

Balanced Mix Design Benchmarking of Field-Produced Asphalt Mixtures in Maine, U.S.

2021 ◽  
pp. 036119812110615
Author(s):  
Ram Kumar Veeraragavan ◽  
Derek Nener-Plante ◽  
Leslie Myers ◽  
Casey Nash ◽  
Nam H. Tran
Keyword(s):  
Performance Test ◽  
Asphalt Pavement ◽  
Research Effort ◽  
Heavy Traffic ◽  
Performance Testing ◽  
Asphalt Mixtures ◽  
Mix Design ◽  
Volumetric Properties ◽  
Tolerance Index ◽  
Cracking Performance

Performance testing has been recognized by state highway agencies (SHAs) in the U.S. and the asphalt paving industry as an important tool to complement volumetric properties for improving asphalt pavement performance. Thus, Maine Department of Transportation (MaineDOT) initiated a research effort in 2019 to evaluate the cracking and rutting resistance of asphalt mixtures using several performance tests, including the Hamburg wheel-tracking test (HWTT), indirect tensile cracking test (IDEAL-CT), cyclic fatigue test, and stress sweep rutting (SSR) test. These tests were conducted on reheated common plant-produced asphalt mixtures, and results were analyzed to: (1) develop baseline rutting and cracking performance; (2) evaluate the effects of mixture properties on the performance test results; and (3) verify the performance enhancement from the extended use of polymer-modified asphalt binders. Several mixture properties, such as nominal maximum aggregate size (NMAS), binder performance grade (PG), binder content (Pb), and reclaimed asphalt pavement (RAP) %, were found to have statistically significant effects on the mixture rutting and cracking resistance, especially the HWTT and IDEAL-CT results. Based on the proposed criteria for rutting strain index (RSI) and apparent damage capacity (Sapp), the asphalt mixtures tested would provide satisfactory rutting performance under heavy traffic, and satisfactory cracking performance under standard traffic. In addition, based on the IDEAL-CT benchmarking results, mixtures with polymer-modified binder and/or smaller NMAS were found to have higher cracking tolerance index (CTindex) results. The information from the research effort will help MaineDOT to achieve its goal to move beyond sole use of volumetric properties for asphalt mixture design and acceptance with the implementation of balanced mix design (BMD) for improving the field performance of asphalt pavements.

scholarly journals The Effect of Basalt Fiber on the Performance of Stone Mastic Asphalt

2020 ◽  
Author(s):  
Altan Cetin ◽  
Burak Evirgen ◽  
Asena Karslioglu ◽  
Ahmet Tuncan
Keyword(s):  
Raw Materials ◽  
Design Method ◽  
Heavy Traffic ◽  
Permanent Deformation ◽  
Basalt Fiber ◽  
Dry Weight ◽  
Type I ◽  
Modified Bitumen ◽  
Mastic Asphalt ◽  
Stone Mastic Asphalt

Stone Mastic Asphalt (SMA) is a mixture design against rutting caused by intensive and heavy traffic loads. While modified bitumen needs to be used in this mixture, the use of cellulosic fibers is essential to prevent the infiltration of bitumen during the carriage of mixture due to high bitumen content. In this study, the effects of basalt fiber on the performance of SMA mixtures is investigated as an alternative to cellulosic fiber admixtures in the prevention of draindown. Raw materials commonly used in Turkey were chosen as Type-I graded limestone aggregate and B50/70 asphalt cement, according to the General Directorate of Highways. In total, 109 specimens were prepared by a gyratory compactor according to the superpave design method. Sixty of these specimens were basalt fiber added samples with a ratio from 0.1 % to 0.8 % by dry weight aggregate. An addition of basalt fiber of 0.6 % at 25 °C seriously increases the resilient modulus and tensile strength of the samples. In addition, 0.4 % basalt fiber mixed samples shows that the greatest resistance against permanent deformation according to the results of static uniaxial creep test performed at 40 °C. Basalt fibers have no positive effect when a decrement of bitumen viscosity exceeds the bitumen softening point at the end of repeated uniaxial tests. On the other hand, bitumen draindown and water damage test results are within acceptable limits.

scholarly journals The importance of changing urban scenery in the assessment of citizens’ soundscape perception. On the need for different time-related points of view

Noise Mapping ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 138-161
Author(s):  
Jerónimo Vida Manzano ◽  
José Antonio Almagro Pastor ◽  
Rafael García Quesada
Keyword(s):  
Urban Areas ◽  
Noise Exposure ◽  
Noise Control ◽  
Action Plan ◽  
Heavy Traffic ◽  
Legal Protection ◽  
Complementary Method ◽  
Reduction Strategies ◽  
The Right ◽  
The City

Abstract The city of Granada is experimenting a big urban transformation, attending national and international commitments on clean air, energy efficiency and savings linked to greenhouse gases reduction strategies and sustainable development action plans. This situation constitutes a good scenario for new noise control approaches that take into account the sound variable and citizens empowering in urban design, such as the soundscape assessment of urban territory. In this way, soundscape tools have been used in Granada as a complementary method for environmental noise characterisation where traditional noise control techniques are difficult to be carried out or give limited results. After 2016 strategic noise map and in the preparation of the new noise action plan, the city came across a great acoustic challenge in a new area located outskirts characterised by growing urbanisation, still under development, the greatest legal protection because of sensitive teaching and hospital buildings and the greatest noise exposure from nearby ring-way supporting heavy traffic flow. As quiet urban areas are not characterised by the absence of noise but for the presence of the right noise, this research intended to provide the local administration with results and proposals to transform this conflict area in a pleasant or quiet urban place. Main results came from important and significative differences in morning and evening characterisation, as great differences appear in soundscape assessment over the day and along the soundwalk path, indicating the importance of time and local issues to adequately characterised citizens perception to be considered by administration in the development of strategies and effective noise control actions.

Flow Number parameter as a performance criteria for asphalt mixtures rutting: evaluation to mixes applied in Brazil Southern region

2021 ◽  
pp. 1-13
Author(s):  
Cléber Faccin ◽  
Luciano Pivoto Specht ◽  
Silvio Lisboa Schuster ◽  
Fernando Dekeper Boeira ◽  
Lucas Dotto Bueno ◽  
...  
Keyword(s):  
Asphalt Mixtures ◽  
Southern Region ◽  
Performance Criteria ◽  
Flow Number ◽  
A Performance

scholarly journals Effect of Rubberized Bitumen Blending Methods on Permanent Deformation of SMA Rubberized Asphalt Mixtures

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Herda Yati Katman ◽  
Mohd Rasdan Ibrahim ◽  
Mohamed Rehan Karim ◽  
Suhana Koting ◽  
Nuha Salim Mashaan
Keyword(s):  
Creep Behaviour ◽  
Permanent Deformation ◽  
Asphalt Mixtures ◽  
Creep Model ◽  
Materials Testing ◽  
Wet Process ◽  
Test Conditions ◽  
Dynamic Creep ◽  
Different Temperatures ◽  
Stone Mastic Asphalt

This study aims at comparing the permanent deformation of Stone Mastic Asphalt (SMA) rubberized asphalt mixtures produced by the wet process. In this study, rubberized binders were prepared using two different blending methods, namely, continuous blend and terminal blend. To study the creep behaviour of control and rubberized asphalt mixtures, the dynamic creep test was performed using Universal Materials Testing Apparatus (UMATTA) at different temperatures and stress levels. Zhou three-stage creep model was utilized to evaluate the deformation characteristics of the mixtures. In all test conditions, the highest resistance to permanent deformation is showed by the rubberized mixtures produced with continuous blend binders. This study also reveals that the permanent deformation of rubberized mixtures cannot be predicted based on the characteristics of the rubberized binders.

Laboratory Evaluation on Steel Slag as Aggregate Replacement in Stone Mastic Asphalt Mixtures

2013 ◽  
Vol 65 (2) ◽  
Author(s):  
Mohd Rosli Hainin ◽  
Gatot Rusbintardjo ◽  
Mohd Azizi Abdul Aziz ◽  
Asmah Hamim ◽  
Nur Izzi Md. Yusoff
Keyword(s):  
Steel Slag ◽  
Asphalt Mixtures ◽  
Laboratory Evaluation ◽  
Mastic Asphalt ◽  
Stone Mastic Asphalt
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