Asphalt Mixtures' Properties Indicative of Tire/pavement Noise
Author: Krishna Prapoorna Biligiri
Publisher:
Published: 2008
Total Pages: 572
ISBN-13:
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Tire Waste and Recycling
Author: Trevor Letcher
Publisher: Academic Press
Published: 2021-03-25
Total Pages: 652
ISBN-13: 0128206861
DOWNLOAD EBOOKTire Waste and Recycling takes a methodical approach to the recycling of tires, providing a detailed understanding on how to manage, process, and turn waste tires into valuable materials and industrial applications. Sections cover fundamental aspects such as tire use, composition, trends, legislation, the current global situation, the possibilities for moving towards a circular economy, lifecycle options, treatment methods, and opportunities for re-use, recycling and recovery. Subsequent sections of the book focus on specific technologies that enable the utilization of waste tires in the development of high value materials and advanced applications. Finally, the future of tire recycling is considered. This is an essential resource for scientists, R&D professionals, engineers and manufacturers working in the tire, rubber, waste, recycling, automotive and aerospace industries. In academia, the book will be of interest to researchers and advanced scientists across rubber science, polymer science, materials engineering, environmental science, chemistry and chemical engineering. Offers systematic coverage of tire recycling, covering composition, lifecycle, processing options, material developments and latest technologies Explains end-of-life-options in detail, considering approaches and methods for reduction, re-use, recycling and recovery Explores key application and product areas for recycled tire materials, from civil engineering, sports and leisure, to roads and transport, construction, automotive, and many more
Estimating Acoustic Performance Trends of Various Asphalt-Surface Mixtures Based on Field Measurement
Author: Qing Lu
Publisher:
Published: 2012
Total Pages: 10
ISBN-13:
DOWNLOAD EBOOKAs one measure to reduce traffic noise, designing a noise-reducing ("quiet") pavement surface has received increasing attention. For asphalt pavements, some existing asphalt mixtures have shown better noise-reducing capabilities than conventional dense-graded asphalt concrete (DGAC) pavements. To design a new asphalt mixture optimized for noise reduction, the acoustic performance of existing asphalt-surface mixtures needs to be evaluated and understood. For this purpose, a study was conducted to measure tire/pavement noise on a variety of asphalt pavements for four consecutive years. The tire/pavement noise was measured with an on-board sound-intensity (OBSI) method that was continuously improved during the study. Regression analysis was applied to determine the levels and increase rates of tire/pavement noise on four major asphalt mixtures, and the effects of mix design variables on tire/pavement noise. Results show that tire/pavement noise generally increases with pavement age on all types of asphalt pavements. For newly placed or overlaid pavements, open-graded or rubberized gap-graded mixtures exhibit lower noise levels than conventional dense-graded asphalt mixture. Open-graded asphalt mixtures can retain noise-reduction benefit for a longer period than gap-graded mixtures. Using rubberized binders in the open-graded mixtures can further reduce the noise-increase rate. Pavement surface permeability, macrotexture, and existing surface distresses may affect the tire/pavement noise level.
Relationship Between Pavement Surface Texture and Highway Traffic Noise
Author: Roger L. Wayson
Publisher: Transportation Research Board
Published: 1998
Total Pages: 96
ISBN-13:
DOWNLOAD EBOOK"This report will be of interest to state DOT pavement engineers, environmental specialists, and noise analysts. The relationship between pavement surface texture and highway traffic noise is discussed. Information for the synthesis was collected by surveying state transportation agencies and by conducting a literature search of both domestic and foreign publications."--Avant-propos.
Hot Mix Asphalt Surface Characteristics Related to Ride, Texture, Friction, Noise and Durability
Author: Tyler Dare
Publisher:
Published: 2014
Total Pages: 116
ISBN-13:
DOWNLOAD EBOOKThe objective of this investigation was to develop a model to predict on-board sound intensity (OBSI) on hot mix asphalt pavements using on-site and laboratory data. The data used included noise and physical property data collected on 25 asphalt-surfaced roadway test sections at the MnROAD pavement testing facility. These test sections were constructed mainly in 2007 and 2008 using a variety of materials, mixtures and layer thicknesses. A modeling approach called the mechanism decomposition approach was used to develop the models. In this approach, the contributions of different noise mechanisms to the overall noise level and to noise in certain frequency ranges are modeled separately then are combined to form the total noise spectrum. Ultimately, two nonlinear statistical models were developed that predict one-third octave band and overall sound intensity levels on asphalt-surfaced pavements. The models incorporate the pavement parameters that were found to have the most significant effects on tire-pavement noise including pavement macrotexture, air temperature, modulus of the pavement surface layer, and the combined effect of temperature and modulus. The models differ in the type of texture data used as an input parameter. The models have been found to predict the overall OBSI sound intensity level to within 1.5 dB and the onethird octave bands to within 2 dB for most of the pavements tested. Other metrics and evaluation of the model accuracy by cell, year, temperature and other factors are also reported. The models are provided in an Excel spreadsheet.
Pavement Engineering
Author: Rajib B. Mallick
Publisher: CRC Press
Published: 2017-10-16
Total Pages: 1013
ISBN-13: 1498758843
DOWNLOAD EBOOKPavement Engineering will cover the entire range of pavement construction, from soil preparation to structural design and life-cycle costing and analysis. It will link the concepts of mix and structural design, while also placing emphasis on pavement evaluation and rehabilitation techniques. State-of-the-art content will introduce the latest concepts and techniques, including ground-penetrating radar and seismic testing. This new edition will be fully updated, and add a new chapter on systems approaches to pavement engineering, with an emphasis on sustainability, as well as all new downloadable models and simulations.
Evaluation of Acoustic Absorption Characteristics of Asphalt Mixtures
Author: Wahid Hassan
Publisher:
Published: 2018
Total Pages: 234
ISBN-13:
DOWNLOAD EBOOKHighways traffic noise is a major issue all over the world. It is annoying to the residents who live nearby major transportation corridors. Noise pollution adversely affects the quality of their life. It also causes sleep disturbance and anxiety. Some of the noise abatement techniques such as noise barrier walls are costly and not effective all the times. Reducing the tire-pavement noise at the source is viable alternative to cut down the noise level. This study examined the use of impedance tube to measure the acoustic absorption of asphalt mixtures in the laboratory. The effect of various parameters on the acoustic absorption was investigated including aggregate gradation, aggregate type, binder type, percent air voids, and sample thickness. In addition, factors that could affect the acoustical performance of asphalt mixtures after pavement construction was also investigated including air void structure, surface texture, temperature, and surface conditions. Percent air voids and layer thickness were found to have a significant influence on the acoustic absorption of asphalt mixtures. An analytical model was proposed to estimate the acoustic absorption coefficient of asphalt mixtures during the design stage. A good correlation was found between predicted and measured absorption coefficients in the laboratory. In addition, a double-layer system of asphalt mixtures was found to be effective in providing improved acoustical performance that overcomes the issues associated with the use of open graded friction course as a wearing surface.
Vehicle/Tire/Road Dynamics
Author: Tan Li
Publisher: Elsevier
Published: 2022-11-24
Total Pages: 664
ISBN-13: 0323906915
DOWNLOAD EBOOKVehicle/Tire/Road Dynamics: Handling, Ride, and NVH presents the connection between NVH and conventional vehicle dynamics where both tire and road play a key role. In this book, there is a chapter for handling dynamics that provides an introduction to ride dynamics and a chapter for ride dynamics that provides an introduction to NVH, presenting better coherence and synergy between these major areas of vehicle/tire dynamics. Accompanying the fundamental theories, case studies are given to facilitate comprehension. In addition to the experimental implementations, the state-of-the-art approaches to simulating vehicle/tire dynamics are presented from the viewpoint of both industry and academia. This new book bridges the gap for experts in tire or pavement NVH (also tire-pavement interaction noise) and those who are experts in vehicle dynamics. Conventional vehicle dynamics (e.g., handling/braking/cornering) is focused on low-frequency performance while NVH (noise/vibration/harshness) is focused on high-frequency performance. There is also another area called "ride" (comfort/stability) which focuses on mid-frequency. Presents a closed loop system for vehicle dynamics, covering handling, riden and NVH. Provides insights into how intelligent tires will enhance autonomous vehicle control and optimize multiple performances, especially for electric vehicles. Demonstrates how pavement characteristics could greatly influence vehicle handling/ride/NVH and improve/balance these performances.
How to Reduce Tire-pavement Noise
Author:
Publisher:
Published: 2008
Total Pages: 62
ISBN-13:
DOWNLOAD EBOOKBetter practices to improve surface properties and thus tire-pavement noise are really about establishing a higher order of control over the texture and other surface properties. It is not about designing or building "innovative" surfaces, but rather the control of conventional texturing techniques. There should be a renewed awareness of the impact that some of the subtle operational characteristics can have on the texture as constructed. Predictable tire-pavement noise levels are not about how the texture is imparted as much as they are about the recognition and management of the sources of variability. Regarding the concrete, noise levels have to do with the fact that the contractors are imparting texture into a material with inherent variability in both stiffness and plasticity. Concrete changes from batch-to-batch, and it changes within a batch. The wind and the sun play a major role, as does the timing of the concrete mixing, transport, placement, and (eventually) the texturing and curing (the latter being important for acoustical durability).
Advances in Materials and Pavement Prediction
Author: Eyad Masad
Publisher: CRC Press
Published: 2018-07-16
Total Pages: 596
ISBN-13: 042985580X
DOWNLOAD EBOOKAdvances in Materials and Pavement Performance Prediction contains the papers presented at the International Conference on Advances in Materials and Pavement Performance Prediction (AM3P, Doha, Qatar, 16- 18 April 2018). There has been an increasing emphasis internationally in the design and construction of sustainable pavement systems. Advances in Materials and Pavement Prediction reflects this development highlighting various approaches to predict pavement performance. The contributions discuss links and interactions between material characterization methods, empirical predictions, mechanistic modeling, and statistically-sound calibration and validation methods. There is also emphasis on comparisons between modeling results and observed performance. The topics of the book include (but are not limited to): • Experimental laboratory material characterization • Field measurements and in situ material characterization • Constitutive modeling and simulation • Innovative pavement materials and interface systems • Non-destructive measurement techniques • Surface characterization, tire-surface interaction, pavement noise • Pavement rehabilitation • Case studies Advances in Materials and Pavement Performance Prediction will be of interest to academics and engineers involved in pavement engineering.
