Field and Laboratory Properties of Lime-Treated Cold In-Place Recycled Asphalt Pavements PDF Download
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Author: RA. Tarefder
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 11
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Book Description
Cold recycling is a technically promising and cost effective method for improving distressed asphalt pavements. Unlike hot-mix recycling, cold recycling lacks extensive field and laboratory performance data. There is no widely accepted cold in-place recycling (CIR) mix design and testing standard available. This study attempts to generate useful field and laboratory data on pavements constructed with CIR mix and technique. Two field case studies are conducted. The testing of field cores and laboratory samples from these two field sites is conducted to address the existing and new methods for design and performance testing of CIR mixes in partial depth pavements. The laboratory tests include physical property testing (e.g., moisture content, gradation, air voids, emulsion, and aggregate properties) and performance-related testing (e.g., resistance to deformation, retained strength, rut, and fatigue). Relative performances of the CIR mixes from the two sites are analyzed.
Author: RA. Tarefder
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 11
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Book Description
Cold recycling is a technically promising and cost effective method for improving distressed asphalt pavements. Unlike hot-mix recycling, cold recycling lacks extensive field and laboratory performance data. There is no widely accepted cold in-place recycling (CIR) mix design and testing standard available. This study attempts to generate useful field and laboratory data on pavements constructed with CIR mix and technique. Two field case studies are conducted. The testing of field cores and laboratory samples from these two field sites is conducted to address the existing and new methods for design and performance testing of CIR mixes in partial depth pavements. The laboratory tests include physical property testing (e.g., moisture content, gradation, air voids, emulsion, and aggregate properties) and performance-related testing (e.g., resistance to deformation, retained strength, rut, and fatigue). Relative performances of the CIR mixes from the two sites are analyzed.
Author: Fernando Pacheco-Torgal
Publisher: Woodhead Publishing
ISBN: 0128189827
Category : Technology & Engineering
Languages : en
Pages : 422
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Book Description
Eco-efficient Pavement Construction Materials acquaints engineers with research findings on new eco-efficient pavement materials and how they can be incorporated into future pavements. Divided into three distinctive parts, the book emphasizes current research topics such as pavements with recycled waste, pavements for climate change mitigation, self-healing pavements, and pavements with energy harvesting potential. Part One considers techniques for recycling, Part Two reviews the contribution of pavements for climate change mitigation, including cool pavements, the development of new coatings for high albedo targets, and the design of pervious pavements. Finally, Part Three focuses on self-healing pavements, addressing novel materials and design and performance. Finally, the book discusses the case of pavements with energy harvesting potential, addressing different technologies on this field. Offers a clear and concise lifecycle assessment of asphalt pavement recycling for greenhouse gas emission with temporal aspects Applies key research trends to green the pavement industry Includes techniques for recycling waste materials, the design of cool pavements, self-healing mechanisms, and key steps in energy harvesting
Author: Asphalt Institute
Publisher:
ISBN: 9781934154175
Category : Asphalt
Languages : en
Pages : 102
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Book Description
Author: Haiping Zhou
Publisher:
ISBN:
Category : Lime
Languages : en
Pages : 30
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Book Description
Author: Don Chen
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 232
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Book Description
Cold in-place recycling (CIR) has become an attractive method for rehabilitating asphalt roads that have good subgrade support and are suffering distress related to non-structural aging and cracking of the pavement layer. Although CIR is widely used, its use could be expanded if its performance were more predictable. Transportation officials have observed roads that were recycled under similar circumstances perform very differently for no clear reason. Moreover, a rational mix design has not yet been developed, design assumptions regarding the structural support of the CIR layer remain empirical and conservative, and there is no clear understanding of the cause-effect relationships between the choices made during the design/construction process and the resulting performance. The objective of this project is to investigate these relationships, especially concerning the age of the recycled pavement, cumulative traffic volume, support conditions, aged engineering properties of the CIR materials, and road performance. Twenty-four CIR asphalt roads constructed in Iowa from 1986 to 2004 were studied: 18 were selected from a sample of roads studied in a previous research project (HR-392), and 6 were selected from newer CIR projects constructed after 1999. This report describes the results of comprehensive field and laboratory testing for these CIR asphalt roads. The results indicate that the modulus of the CIR layer and the air voids of the CIR asphalt binder were the most important factors affecting CIR pavement performance for high-traffic roads. For low-traffic roads, the wet indirect tensile strength significantly affected pavement performance. The results of this research can help identify changes that should be made with regard to design, material selection, and construction in order to improve the performance and cost-effectiveness of future recycled roads.
Author:
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 466
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Book Description
Author: Asphalt Institute
Publisher:
ISBN: 9781934154090
Category : Aggregates (Building materials)
Languages : en
Pages : 185
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Book Description
Author: Dong Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 526
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Book Description
Asphalt pavements deteriorate over time. Typically three to five years following construction, reflected cracks, one of the primary forms of distress in hot-mix asphalt overlays of flexible pavements, may be observed. When rolled down, reflected cracks affect ride quality. In addition, reflected cracks allow the penetration of water into the pavement and the base. The water causes the asphalt mix to deteriorate and the base to soften. Consequently the service life of pavements is reduced. Cold In-Place Recycling (CIR) provides an economical rehabilitation method that mitigates crack reflection by pulverizing the asphalt pavement surface, thus destroying the old crack pattern in the recycled layer. However, recycled roads have inconsistent performance. Several years after recycling, some roads are still in excellent condition with only a few minor cracks while extensive cracking and rutting were observed on other roads. These opposite behaviors can be observed on roads that were constructed in the same county, by the same contractor in the same construction season. Thus the difference in performance is probably not from such factors as weather, equipment, contractors' experiences, and construction procedures. Rather, other factors become more prominent in affecting pavement performance, such as: age of the recycled pavement; traffic volume; support conditions; and aged engineering properties of the CIR materials. This dissertation investigates how aged engineering properties of the CIR materials and other factors affect pavement performance. Twenty-four sample roads were selected to represent various ages, traffic volumes, and support conditions in a geographically balanced sampling in Iowa. Pavement Condition Index (PCI) ratings were collected using an automated pavement distress digital image collection and analysis system. Engineering properties of CIR materials were examined through field and lab tests. Statistical analyses were conducted to descript the relationships between the pavement performance and the prominent factors. The conclusions and recommendations were presented in this dissertation.
Author: Roland D. Sison
Publisher:
ISBN:
Category : Asphalt emulsion mixtures
Languages : en
Pages : 306
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Book Description
Author: Thomas William Kennedy
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 66
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Book Description
