Evaluation of Cold In-place Recycled Mixtures on US-283 PDF Download
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Author: Stephen Alan Cross
Publisher:
ISBN:
Category : Asphalt emulsion mixtures
Languages : en
Pages : 72
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Book Description
The Kansas Department of Transportation (KDOT) by cold in-place recycling (CIR) recycles approximately 120 to 160 km of pavement a year as a part of their 1-R maintenance program. Originally KDOT utilized asphalt emulsions (AE) as the additive in CIR mixtures, but based on performance concerns currently utilizes type C fly ash. Recent research indicates that the use of CIR with asphalt emulsion and hydrated lime, introduced as hot slurry, provides improved performance. KDOT constructed two test sections on US-283 using type C fly ash and CSS-1 with hot lime slurry and type C fly ash. Two additional asphalt emulsions were evaluated as well, CMS-1 and HFE-150. The cores and laboratory samples were tested for tensile strength, AASHTO T283, resilient modulus and for rutting resistance and moisture damage using the Asphalt Pavement Analyzer (Georgia Rut Tester).
Author: Stephen Alan Cross
Publisher:
ISBN:
Category : Asphalt emulsion mixtures
Languages : en
Pages : 72
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Book Description
The Kansas Department of Transportation (KDOT) by cold in-place recycling (CIR) recycles approximately 120 to 160 km of pavement a year as a part of their 1-R maintenance program. Originally KDOT utilized asphalt emulsions (AE) as the additive in CIR mixtures, but based on performance concerns currently utilizes type C fly ash. Recent research indicates that the use of CIR with asphalt emulsion and hydrated lime, introduced as hot slurry, provides improved performance. KDOT constructed two test sections on US-283 using type C fly ash and CSS-1 with hot lime slurry and type C fly ash. Two additional asphalt emulsions were evaluated as well, CMS-1 and HFE-150. The cores and laboratory samples were tested for tensile strength, AASHTO T283, resilient modulus and for rutting resistance and moisture damage using the Asphalt Pavement Analyzer (Georgia Rut Tester).
Author: Stephen Alan Cross
Publisher:
ISBN:
Category : Low-volume roads
Languages : en
Pages : 190
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Book Description
Kansas has many miles of thermally cracked roads primarily in the western one-half of the State. Rehabilitation with conventional hot mix asphalt overlays and hot recycling have not given the service life expected before the existing cracks reflect through the pavement. Since 1986, the Kansas Department of Transportation has been utilizing cold in-place recycling (CIR) with an emulsified asphalt as an additive as a cost effective alternative for rehabilitation of thermally cracked low volume pavements. Field performance of the final product appears to have more variation than desirable with an expected life of three to five years. The results of a two year study indicate that the material properties of the locally available aggregates are poor which results in low strength of the CIR mixes. In addition, the in-place air voids of the wearing surface were high and had an adverse effect on the performance of CIR mixes.
Author: Soohyok Im
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 0
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Book Description
An extensive literature review on cold in-place recycling (CIR) mixture designs and requirements along with laboratory testing and pavement performance prediction was conducted in this project. Based on the findings and results from prior tasks, this document shows the recommended CIR mixture design requirements, and the recommended mixture testing for quality control, respectively. While this project's activities focused primarily on materials for CIR, based on the literature and the findings in this project, it should also be appropriate for cold central plant recycled mixtures.
Author: Giovanni B. Barla
Publisher:
ISBN: 9788855528122
Category : Computer-aided engineering
Languages : en
Pages : 754
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Book Description
Author:
Publisher:
ISBN:
Category : Air travel
Languages : en
Pages : 802
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Book Description
Author: Stephen Alan Cross
Publisher:
ISBN:
Category : Fly ash
Languages : en
Pages : 116
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Book Description
The Kansas Department of Transportation has developed an innovative method of rehabilitating pavements of low volume roads utilizing cold in-place recycling of the asphalt and mixing type C fly ash with the recycled material. Field test sections indicate fly ash improves constructability and moisture sensitivity as well as utilizing a by-product that currently ends up in landfills. The same field test sections have shown increased cracking with increased fly ash contents and a drop in pavement modulus with time. Reclaimed asphalt pavement (RAP) was mixed with 3, 7, 11 and 15% fly ash and the laboratory samples were evaluated for fatigue life, durability, freeze-thaw resistance and thermal cracking. The performance of RAP mixed with asphalt emulsion and asphalt emulsion plus hydrated lime was also evaluated.
Author: Atenea Salomon
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 77
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Book Description
Author: Imad L. Al-Qadi
Publisher: CRC Press
ISBN: 1351659227
Category : Technology & Engineering
Languages : en
Pages : 310
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Book Description
An increasing number of agencies, academic institutes, and governmental and industrial bodies are embracing the principles of sustainability in managing their activities and conducting business. Pavement Life-Cycle Assessment contains contributions to the Pavement Life-Cycle Assessment Symposium 2017 (Champaign, IL, USA, 12-13 April 2017) and discusses the current status of as well as future developments for LCA implementation in project- and network-level applications. The papers cover a wide variety of topics: - Recent developments for the regional inventory databases for materials, construction, and maintenance and rehabilitation life-cycle stages and critical challenges - Review of methodological choices and impact on LCA results - Use of LCA in decision making for project selection - Implementation of case studies and lessons learned: agency perspectives - Integration of LCA into pavement management systems (PMS) - Project-level LCA implementation case studies - Network-level LCA applications and critical challenges - Use-phase rolling resistance models and field validation - Uncertainty assessment in all life-cycle stages - Role of PCR and EPDs in the implementation of LCA Pavement Life-Cycle Assessment will be of interest to academics, professionals, and policymakers involved or interested in Highway and Airport Pavements.
Author: Stephen A. Cross
Publisher:
ISBN:
Category : Fly ash
Languages : en
Pages : 16
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Book Description
The Kansas Department of Transportation (KDOT) uses cold in-place recycling (CIR) for approximately 120 to 160 km of pavement a year as a part of its 1-R maintenance program. Originally KDOT used asphalt emulsions as the additive in CIR mixtures, but on the basis of performance concerns it currently uses type C fly ash. Recent research indicates that the use of CIR with asphalt emulsion and hydrated lime, introduced as hot slurry, provides improved performance. KDOT constructed two test sections on US-283 using type C fly ash and cationic slow set (CSS-1) with hot lime slurry. Samples of the materials were obtained and laboratory evaluations undertaken to evaluate the performance of CIR with hot lime slurry. Two additional mixing grade asphalt emulsions, cationic medium set (CMS-1) and high float (HFE-150), were evaluated as well. Laboratory samples were tested for tensile strength, moisture sensitivity, and resilient modulus. Laboratory compacted samples were tested for rutting resistance and moisture damage by using the asphalt pavement analyzer (Georgia rut tester). Results indicate that the use of hot lime slurry resulted in an improvement in material properties that affect the performance of CIR pavements, regardless of the emulsion used, and that CIR with hot lime slurry could be an alternative to the use of type C fly ash.
Author: Janki Bhavsar
Publisher:
ISBN:
Category :
Languages : en
Pages : 134
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Book Description
Cold Mix Asphalt (CMA) is used in several rehabilitation techniques, which uses 100% Reclaimed Asphalt Pavement (RAP), thus making it a sustainable product in the industry. Using CMA for rehabilitation decreases the energy consumption and greenhouse gas emissions. In Ontario, it has been implemented over the past 17 years. There are two main techniques used for CMA: Cold In-Place Recycling (CIR) and Cold In-Place Recycling with Expanded Asphalt Mixture (CIREAM). It is necessary to determine the performance of these techniques in order to determine the age of the pavement and expand their applications. There is a lack of laboratory and field performance information in Ontario for these two techniques. Thus, in this study, laboratory investigation was carried out to establish and compare the material performance of CIR and CIREAM. In addition, a field study was conducted which involved the evaluation of several road sections which have used CIR and CIREAM techniques. For this project, the test material was collected from road sections in Ontario, thus, this study was focused on CIR and CIREAM applications in Ontario and tests were based on standards followed by the province. Although the study was conducted for Ontario, the methodology may be applied outside of Ontario with similar climate conditions. However, the results would vary based on the type of material used. The laboratory study included testing for the overall stiffness, tensile strength, and fatigue behavior of the test samples to simulate their long-term performance. RAP was extracted from southern and northern parts of Ontario to make the test samples. A curing duration test was conducted using the dynamic modulus test apparatus. This test was done to determine a curing time of CIR samples in the laboratory which provided the best stiffness. For the stiffness test, sample mixes were constructed with varying percentages of asphalt cement (AC). From these mixes, the best performing mix was chosen based on its workability, rutting resistance and overall stiffness. The fatigue and tensile strength tests were conducted using the optimal mix chosen from the stiffness test and the samples were cured according to the results from the curing duration test. From the curing duration test, it was concluded that curing the CIR samples for 14 days after compaction gave a higher stiffness to the mix. For the CIR mixes using southern Ontario RAP, the mix with 3.2%AC performed well in comparison to the other mixes. The CIREAM mixes with varying percentages of AC had an overall similar performance. The fatigue testing showed that both CIR and CIREAM samples had similar fatigue resistance. The TSRST tests showed that CIR samples exhibited more shrinkage in comparison to CIREAM and they had higher tensile stresses at failure. The dynamic modulus testing of the CIR samples using northern Ontario RAP showed no statistically significant differences between the mixes. The gradation of the RAP used had a large impact on the stiffness and workability of the sample mixes and their performance. The field study included road sections with varying roadway and pavement attributes. Data was collected from various municipalities which included the City of Waterloo, County of Peterborough, Region of Northumberland, York Region, Haldimand County, County of Perth, County of Wellington, and the united counties of Stormont, Dundas and Glengarry, along with the Ministry of Transportation Ontario (MTO). This data highlighted the limits of all road sections which had implemented CIR or CIREAM within the municipalities. Approximately 200 road sections were identified which had used CIR or CIREAM techniques. These sections were visually inspected in three different municipalities; specifically the City of Waterloo, Perth County, and the united counties of Stormont, Dundas and Glengarry. From the visual inspections large amounts of deteriorations were observed where greater number of trucks, poor drainage and low speeds were prevalent. Field data evaluation showed no significant effect on physical condition, PCI or rut depth of the roadway due to age, AADT or AADTT, respectively. To date, these techniques are used on low volume roadways but there is also an opportunity to expand to higher volume roadways to promote sustainable use of recycled asphalt. These techniques are sustainable due to their use of 100% recycled aggregates and low energy consumption. Thus, by closing the research gap on their performance information, it would help broaden their application.
