Materials And Mix Optimization Procedures For Pcc Pavements
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Materials And Mix Optimization Procedures For Pcc Pavements
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Author : Scott Schlorholtz
language : en
Publisher:
Release Date : 2006
Materials And Mix Optimization Procedures For Pcc Pavements written by Scott Schlorholtz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Pavements, Concrete categories.
This research project investigated important variables that impact the homogeneity and rheology of concrete mixtures. The project consisted of a field study and a laboratory study. The field study collected information from six different projects in Iowa. The information that was collected during the field study documented cementitious material properties, plastic concrete properties, and hardened concrete properties. The laboratory study was used to develop baseline mixture variability information for the field study. It also investigated plastic concrete properties using various new devices to evaluate rheology and mixing efficiency. In addition, the lab study evaluated a strategy for the optimization of mortar and concrete mixtures containing supplementary cementitious materials.
Material And Construction Optimization For Prevention Of Premature Pavement Distress In Pcc Pavements
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Author :
language : en
Publisher:
Release Date : 2008
Material And Construction Optimization For Prevention Of Premature Pavement Distress In Pcc Pavements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Pavements, Concrete categories.
In Phase I, the research team contacted each of 16 participating states to gather information about concrete and concrete material tests. A preliminary suite of tests to ensure long-term pavement performance was developed. The tests were selected to provide useful and easy-to-interpret results that can be performed reasonably and routinely in terms of time, expertise, training, and cost. The tests examine concrete pavement properties in five focal areas critical to the long life and durability of concrete pavements: (1) workability, (2) strength development, (3) air system, (4) permeability, and (5) shrinkage. The tests were relevant at three stages in the concrete paving process: mix design, preconstruction verification, and construction quality control. In Phase II, the research team conducted field testing in each participating state to evaluate the preliminary suite of tests and demonstrate the testing technologies and procedures using local materials.
Material And Construction Optimization For Prevention Of Premature Pavement Distress In Pcc Pavements
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Author :
language : en
Publisher:
Release Date : 2006
Material And Construction Optimization For Prevention Of Premature Pavement Distress In Pcc Pavements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Concrete construction categories.
The chemistry of today's concrete mixture designs is complicated by many variables, including multiple sources of aggregate and cements and a plethora of sometimes incompatible mineral and chemical admixtures. Adding to the complexity are construction variables such as weather, mix delivery times, finishing practices, and pavement opening schedules. Mixture materials, mix design, and pavement construction are not isolated steps in the concrete paving process. Each affects and is affected by the other in ways that determine overall pavement quality and long-term performance. Equipment and procedures commonly used to test concrete materials and concrete pavements have not changed in decades, leaving serious gaps in our ability to understand and control the factors that determine concrete durability. The concrete paving community needs tests that will adequately characterize the materials, predict interactions, and monitor the properties of the concrete. The overall objectives of this study are to evaluate conventional and new technologies and procedures for testing concrete and concrete materials to prevent material and construction problems that could lead to premature concrete pavement distress; and examine and refine a suite of tests used to more accurately evaluate concrete pavement properties. As part of Phase I, the MCO project research team contacted each participating state to gather information related to concrete and concrete material tests. A preliminary suite of tests to ensure long-term pavement performance was developed. The goal was to include tests that provide useful information and results that are easy to interpret, and that can be reasonably performed routinely in terms of time, expertise, training, and cost. The tests examine concrete pavement properties in five focal areas determined to be most critical to the long life and durability of concrete pavements: (1) workability, (2) strength development, (3) air system, (4) permeability, and (5) shrinkage. The tests were considered for relevance at three stages in the concrete paving process: mix design, preconstruction verification, and construction quality control. As part of Phase II, the research team is currently conducting field testing in each participating state to evaluate the preliminary suite of tests and demonstrate the testing technologies and procedures using local materials. A Mobile Concrete Research Lab has been designed and equipped to facilitate the demonstrations. This preliminary field testing report documents the results of the shadow construction project in Kansas. The results of the overall project to date are also being compiled in a user-friendly field manual of practical tests and troubleshooting guidance. Phase III will refine and finalize lab and field tests based on shadow project test data.
Testing Guide For Implementing Concrete Paving Quality Control Procedures
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Author : Gary J. Flick
language : en
Publisher:
Release Date : 2008
Testing Guide For Implementing Concrete Paving Quality Control Procedures written by Gary J. Flick and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Pavements, Concrete categories.
Construction of portland cement concrete pavements is a complex process. A small fraction of the concrete pavements constructed in the United States over the last few decades have either failed prematurely or exhibited moderate to severe distress. In an effort to prevent future premature failures, 17 state transportation agencies pooled their resources, and a pooled fund research project, Material and Construction Optimization for Prevention of Premature Pavement Distress in PCC Pavements, was undertaken in 2003. Its purpose was to evaluate existing quality control tests, and then select and advance the state-of-the-practice of those tests most useful for optimizing concrete pavements during mix design, mix verification, and construction. This testing guide is one product of that project. The guide provides three recommended testing schemes (Levels A, B, and C, depending on a pavement's design life and traffic volumes, etc.) that balance the costs of testing with the risk of failure for various project types. The recommended tests are all part of a comprehensive suite of tests described in detail in this guide.
Material And Construction Optimization For Prevention Of Premature Pavement Distress In Pcc Pavements
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Author :
language : en
Publisher:
Release Date : 2004
Material And Construction Optimization For Prevention Of Premature Pavement Distress In Pcc Pavements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Pavements, Concrete categories.
Annual Report
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Author : Iowa State University. Department of Civil, Construction and Environmental Engineering
language : en
Publisher:
Release Date : 2005
Annual Report written by Iowa State University. Department of Civil, Construction and Environmental Engineering and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Civil engineering categories.
Computer Based Guidelines For Concrete Pavements
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Author :
language : en
Publisher:
Release Date : 2005
Computer Based Guidelines For Concrete Pavements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with HIPERPAV II (Computer file) categories.
This report documents enhancement incorporated in the (HIgh PERformance PAVing) HIPERPAV(trademark) II software. Enhancements made within this project include the addition of two major modules: a module to predict the performance of Jointed Plain Concrete Pavement (JPCP) as affected by early-age factors and a module to predict the early-age behavior (first 72 hours) and early life (up to 1 year) of Continuously Reinforced Concrete Pavement (CRCP). Two additional Federal Highway Administration (FHWA) studies were also incorporated: one that predicts dowel bearing stresses as a function of environmental loading during the early age and a module for optimization of concrete paving mixes as a function of 3-day strength, 28-day strength, and cost. Additional functionality to the software also was incorporated by reviewing and prioritizing the feedback provided by users of the first generation of the software, HIPERPAV 1.
Material And Construction Optimization For Prevention Of Premature Pavement Distress In Pcc Pavements
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Author : Iowa State University. Center for Portland Cement Concrete Pavement Technology
language : en
Publisher:
Release Date : 2004
Material And Construction Optimization For Prevention Of Premature Pavement Distress In Pcc Pavements written by Iowa State University. Center for Portland Cement Concrete Pavement Technology and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Department Of Transportation And Related Agencies Appropriations For 2002 2002 Budget Justifications
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Author : United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations
language : en
Publisher:
Release Date : 2001
Department Of Transportation And Related Agencies Appropriations For 2002 2002 Budget Justifications written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with United States categories.
Department Of Transportation And Related Agencies Appropriations For 2002
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Author : United States. Congress. House. Committee on Appropriations. Subcommittee on Dept. of Transportation and Related Agencies Appropriations
language : en
Publisher:
Release Date : 2001
Department Of Transportation And Related Agencies Appropriations For 2002 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Dept. of Transportation and Related Agencies Appropriations and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with United States categories.