Author: Erdem ColeriPublisher:
ISBN:
Category :
Languages : en
Pages : 12
Book Description
Research Project Work Plan for Constructing High Performance Asphalt Pavements by Improving In-place Pavement Density
Author: Erdem ColeriUsing Cost, Mix Design, Construction, and Performance Data to Inform Hot Mix Asphalt Pavement Policy and Standards
Author: Ryan A. HowellPublisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 175
Book Description
This dissertation integrates and assesses in-service hot mix asphalt pavement data from several typically available but disconnected data sources to inform pavement policy and specification development. This in-service pavement data approach captures connected pavement data from different stages of pavement projects (e.g. mix design, construction, performance after completion) to better understand the relationship between actual in-service performance and mix design, structural design, and construction variables. The dissertation addresses the following research question: what is the value of the in-service pavement data approach in developing hot mix asphalt pavement policy and specifications? To test this question, the dissertation applies this approach using data from 2007 to 2017 to investigate several current Washington State Department of Transportation (WSDOT) research questions. Using the in-service pavement data approach, WSDOT pavement performance questions regarding (1) 3/8-inch versus 1/2-inch nominal maximum aggregate size (NMAS) mixtures, (2) the influence of elevated in-place density mixtures and other mixture characteristics, and (3) high-reclaimed asphalt pavement (RAP) (> 20%) versus up-to-20%-RAP mixtures are analyzed. High level findings include: (1) there is no statistical evidence to suggest a difference in performance between 3/8-inch and 1/2-inch NMAS mixtures; however, the cracking/rutting performance of 3/8-inch NMAS mixtures may be trending higher for older mixtures (ages 9-10); (2) there is no field evidence to suggest an apparent trend between elevated density and increased cracking/rutting performance; however, fine-graded mixture cracking performance may be trending higher than coarse-graded mixtures for older contracts (ages 8-10) and no contracts with a density of 94% or higher perform poorly ([less than or equal to] 50 cracking/rutting condition value); and (3) there is no statistical evidence to suggest a difference in performance between high-RAP (> 20%) and up-to-20%-RAP mixtures. Ultimately, the in-service pavement data approach is a repeatable framework that can be used to better understand the relationship between actual in-service performance and mix design, structural design, and construction variables. Additionally, it is generalizable to any field with large data sets on in-service pavements (e.g. airfields, highways, etc.). Towards this end, the in-service pavement data approach and high-level findings of the WSDOT case studies may be applicable to the U.S. Air Force pavement program.
Longterm pavement performance information management system pavement performance database user reference guide
Author: Publisher: DIANE Publishing
ISBN: 1428995234
Category :
Languages : en
Pages : 172
Book Description
Gravel Roads
Author: Ken SkorsethPublisher:
ISBN:
Category : Gravel roads
Languages : en
Pages : 112
Book Description
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Surface Transportation Research and Development Plan: Main report
Author: Stabilization of Existing Subgrades to Improve Constructibility During Interstate Pavement Reconstruction
Author: Joakim G. LagurosPublisher: Transportation Research Board
ISBN: 9780309061018
Category : Dinosaurs
Languages : en
Pages : 88
Book Description
This synthesis will be of interest to state department of transportation (DOT) construction, geotechnical, materials, and pavement system design engineers, engineering geologists, and research engineers, and others concerned with the constructibility of new pavements over existing subgrades. The synthesis describes current practice for the stabilization of existing subgrades to improve constructibility during interstate pavement reconstruction. It presents information regarding the methods available to evaluate and improve subgrade conditions for the purpose of meeting the constructibility requirements of a reconstruction project. This report of the Transportation Research Board presents data obtained from a review of the literature and a survey of the state DOTs. The synthesis reports on: subgrade evaluation methods including sampling, laboratory, and in-situ test methods, as well as assessment of existing drainage systems; constructibility factors such as existing and proposed pavement types, available equipment, and cost effectiveness of various subgrade stabilization techniques; methods of subgrade improvement including mechanical and chemical stabilization, use of recycled and waste materials, the use of geosynthetics in reinforcement and drainage applications; and construction methods with an emphasis on innovative approaches such as novel sequencing of construction traffic, use of lightweight equipment, and robotics. In addition, several case histories describing applicable pavement reconstruction projects are presented. Finally, suggestions to possibly improve the practice and the identification of research needs are also presented.
Superpave Mix Design
Author: Asphalt InstitutePublisher:
ISBN: 9781934154175
Category : Asphalt
Languages : en
Pages : 102
Book Description
Specific Pavement Studies Construction Guidelines for Experiment SPS-5, Rehabilitation of Asphalt Concrete Pavements
Author: Strategic Highway Research Program (U.S.)Publisher:
ISBN:
Category : Long term pavement performance (LTPP)
Languages : en
Pages : 16
Book Description
AASHTO Guide for Design of Pavement Structures, 1993
Author: American Association of State Highway and Transportation OfficialsPublisher: AASHTO
ISBN: 1560510552
Category : Pavements
Languages : en
Pages : 622
Book Description
Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.
Author: David Trejo