Investigational Concrete Pavement in Minnesota PDF Download
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Author: P. G. Velz
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 86
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Book Description
This 18-year report concludes the 1940 investigational concrete pavement project in Minnesota. The project was one of six constructed by various states in cooperation with the Bureau of Public Roads for the purpose of evaluating certain principles of concrete pavement design and the relative performance of such pavements over a period of years. Particular emphasis was placed on the effects of joint spacing, reinforcement, and pavement cross section.
Author: P. G. Velz
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 86
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Book Description
This 18-year report concludes the 1940 investigational concrete pavement project in Minnesota. The project was one of six constructed by various states in cooperation with the Bureau of Public Roads for the purpose of evaluating certain principles of concrete pavement design and the relative performance of such pavements over a period of years. Particular emphasis was placed on the effects of joint spacing, reinforcement, and pavement cross section.
Author: Tom Burnham
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 346
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Book Description
The incorporation of full-depth colored concrete into street and roadway projects has been rapidly increasing in Minnesota. Some of these projects have exhibited significant early distresses, particularly near contraction joints. The first objective of this project was to identify any materials, design, or construction methods unique to colored concrete that may contribute to the early deterioration observed in colored concrete pavements, sidewalks and medians in Minnesota. The second objective included developing recommendations for improved specifications for materials, mix designs, and construction practices for colored concrete in cold climates. Finally, recommendations were made for suitable repair and rehabilitation techniques or alternative construction systems that might provide more durable, longerlasting colored concrete features in Minnesota. Many projects exhibited panel cracking, either a result of possible thermal expansion restraint or potentially some expansive materials related issues. A number of the projects demonstrated significant joint distress. Smooth surface textures were also reported for many colored concrete crosswalks and sidewalks. Based on this investigation, it was determined that typical placement and finishing practices during construction were not a principal cause for the observed deterioration. Recommendations included producing mixes with a lower water-to-cementitious ratio (≤ 0.43), and increasing consolidation of the mix during placement. Designers were instructed to consider the differences in thermal expansion rates of various colored concretes placed side by side. The report concludes with discussions on suitable repair options, as well as alternative streetscaping techniques.
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 108
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Book Description
Author: Ryan J. Rohne
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 23
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Book Description
Author: Andrew D. Halverson
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 32
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
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Book Description
Author: Minnesota. Highway Department
Publisher:
ISBN:
Category : Expansion joints
Languages : en
Pages : 172
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Book Description
Author: Portland Cement Association
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 128
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Book Description
Author: Portland Cement Association
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 16
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Book Description
Author: Matthew S. Oman
Publisher:
ISBN:
Category : Low-volume roads
Languages : en
Pages : 46
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Book Description
The Minnesota Department of Transportation's (MnDOT) concrete pavement design procedure, RigidPave, is based on the 1981 American Association of State Highway and Transportation Officials (AASHTO) Interim Guide and is entirely empirically-based. The American Cement Pavement Association (ACPA) developed StreetPave based on the Portland Cement Association (PCA) thickness design method with updated information, including a new fatigue model. This study compared RigidPave to StreetPave with a review of the input variables and design inputs used by surrounding departments of transportation. Existing thin (six inches or less) concrete pavements were also evaluated, which included both city and county pavements and test cells at MnROAD. There are two primary differences between the RigidPave and StreetPave: 1) traffic is handled differently and 2) the underlying design methodology. Both are based on time-tested and proven design methodologies and provide generally similar designs. The predicted design lives of the doweled low-volume cells at MnROAD appear to be similar using either StreetPave or RigidPave. The examples provided by cities and counties typically did not contain enough known information, and therefore, required too many assumptions for analysis. The authors recommend that StreetPave is added as an alternate concrete pavement thickness design procedure for city and county projects in Minnesota. Use of the StreetPave is currently allowed by the Virginia Department of Transportation for design of secondary roads. It was also determined that RigidPave has a built-in reliability of approximately 89% due to a factor of safety that is applied to the modulus of rupture. An alternate approach to allowing StreetPave as a design option would be to incorporate the reliability knowledge of RigidPave learned as part of this project.
