Download or read book Evaluation of Recycled Portland Cement Concrete Pavements for Base Course and Gravel Cushion Material written by Allen L. Cooley and published by . This book was released on 2007 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based upon the work conducted in this study, it was concluded the recycled portland cement concrete pavements are available as an option for the construction of gravel cushion and aggregate base course layers.
Download or read book Portland Cement Concrete Recycling written by R. Gordon McKeen and published by . This book was released on 1982 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The review of current technology pertaining to the recycling of existing portland cement concrete pavements was conducted. The purpose was to assess the applicability of recycling to U.S. Air Force pavement rehabilitation work. Costs of alternatives were reduced to simple models for use in evaluating sensitivity to cost factors. A study of projects on which this technology was used identified aggregate cost and haul distance as key factors.
Download or read book Recycled Portland Cement Concrete Pavements written by Woodrow J. Halstead and published by . This book was released on 1979 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report constitutes a review of the literature concerning recycling of portland cement concrete pavements by crushing the old pavement and reusing the crushed material as aggregate in a number of applications. A summary of the major projects conducted by state transportation departments is included. Crushed portland cement concrete is shown to have been successfully used in the following applications. 1. Graded-aggregate bases 2. Cement-treated bases 3. Asphalt base courses and pavements 4. Portland cement concrete bases (econocrete) and pavements 5. Source of supply for independent commercial operations selling aggregate for a variety of applications. In any given circumstances the cost and availability of new aggregate and the cost of disposing of the old concrete play important roles in establishing whether or not recycling is a desirable alternative. Consequently, each project or the general situation for a given area must be examined separately and the decision made on the basis of local conditions.
Download or read book Recycling of Portland Cement Concrete Pavement written by John B. Wojakowski and published by . This book was released on 1995 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recycling of portland cement concrete pavements (PCCP) can help alleviate any material disposal problems during construction, especially in urban areas and reduce the consumption or importation of virgin aggregate into aggregate poor areas. Two test sections using the coarser fraction from the original crushed PCCP were placed on K-7 in 1985. One section incorporated a recycled base and standard PCCP construction; another section was designed as a recycled base and recycled PCCP. Two other sections were control sections constructed with regular aggregate.
Download or read book Recycling of Portland Cement Concrete Pavements written by William A. Yrjanson and published by . This book was released on 1989 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to pavement designers, construction engineers, and others interested in economical methods for recontstructing portland cement concrete (PCC) pavements. Information is provided on the processes and procedures used by a number of states in using PCC pavement as aggregate in reconstructed concrete pavement. Since 1975 a number of state highway agencies have reconstructed concrete pavements using the old PCC as aggregate in the new pavement. This report of the Transportation Research Board describes the processes used on various projects in several states, giving details of construction procedures, as well as test results on various properties of the recycled aggregates and the resultant concrete.
Download or read book Guidance Document for Reclaimed Portland Cement Concrete written by Gajanan M. Sabnis and published by . This book was released on 2001 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Large Box Study on Granular Base Options for Portland Cement Concrete Pavements written by Tanya N. Walkenbach and published by . This book was released on 2021 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the depletion of natural resources and limited funding for necessary pavement construction and rehabilitation, recycled concrete aggregate (RCA) and reclaimed asphalt pavement (RAP) are potential alternatives to the virgin granular base (VGB) typically used. The addition of geosynthetics at the interface of base course and subgrade can stabilize base course sections through separation, lateral restraint, and a tensioned membrane effect. This large-scale box study focused on two different granular base options (VGB and RCA) with geosynthetic stabilization for concrete pavement applications. Unpaved road tests under cyclic loading were first conducted on these granular bases over weak subgrade to evaluate the benefits of three types of geosynthetics (nonwoven geotextile, woven geotextile, and triaxial geogrid) and replacement of VGB with RCA in the improved performance (permanent deformation and stress reduction) and properties (resilient modulus and modulus of subgrade reaction). The nonwoven geotextile was selected for three concrete paved roads with VGB and RCA over the same subgrade under cyclic loading. Displacement transducers and earth pressure cells were placed in the test sections to monitor resilient and permanent deformations on the section surface and vertical interface stresses between base course and subgrade. For the unpaved test sections, the measured resilient and permanent deformations and the interface stress reduction were analyzed to evaluate the benefits of geosynthetics and replacement of VGB with RCA. The modified Burmister solution and the stress reduction method were used to back-calculate the resilient moduli (Mr) of the granular bases for all the test sections. Back-calculated resilient moduli were correlated with the accumulated permanent deformations to assess these methods. The American Association of State Highway and Transportation Officials (AASHTO, 1993) design chart was used to estimate the composite subgrade reaction moduli of the unpaved test sections based on the back-calculated resilient moduli (Mr) of the granular bases. The three concrete paved sections and the benefits of the nonwoven geotextile and the replacement of VGB with RCA were evaluated in terms of their total and permanent displacements and base course-subgrade interface stresses. Based on the measured vertical displacements at the loaded corner, Westergaard's (1926) method was used to back-calculate the subgrade reaction moduli of these sections and estimate the tensile stresses in the concrete slabs. The back-calculated subgrade reaction moduli of these concrete paved sections were compared with those calculated based on the unpaved road sections. The key findings of this study are: (1) geosynthetics were effective in reducing the permanent deformations of both VGB and RCA base courses over the weak subgrade in unpaved and concrete paved roads under cyclic loading; (2) RCA was stronger and stiffer than VGB and replacement of VGB with RCA reduced the permanent deformations in unpaved and concrete paved roads under cyclic loading; (3) the resilient modulus of the base course in an unpaved road section back-calculated by the modified Burmister solution with the mechanistic-empirical damage model was correlated well with the accumulated permanent deformation of the unpaved road section; (4) the modulus of subgrade reaction of a base over a subgrade estimated by the AASHTO design chart with the back-calculated resilient modulus of the base from an unpaved road test was similar to that back-calculated by the Westergaard solution based on the displacement at the loaded corner; (5) the accumulated permanent deformation of an unpaved or concrete paved section increased with the reduction of the subgrade reaction modulus in a semi-logarithmic relationship; and (6) geosynthetic stabilization and/or replacement of VGB with RCA increased the resilient modulus and the subgrade reaction modulus of a test section.
Download or read book Rehabilitation and Evaluation of Distressed Portland Cement Concrete Pavement written by Daniel Okpala and published by . This book was released on 1997 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Recycling Continuously Reinforced Portland Cement Concrete written by Bernerd J. Southam and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recycling of Portland Cement Concrete Airport Pavements written by M. C. Hironaka and published by . This book was released on 1987 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to develop criteria and guidelines for recycling portland cement concrete (PCC) airport aprons. Included in this study are all aspects of the recycling process including breakup and removal, steel reinforcement removal, crushing, screening, stockpiling, mix design, testing, placing, finishing, and performance. Recycling of PCC requires some specialized equipment such as pavement breakers and electromagnets for steel removal; however, all of the other equipment and procedures are those commonly used in the construction industry. Based on the regression experimental design procedure and laboratory tests conducted on pavement samples from six airports of widely varying age and conditions, it has been conclusively shown that aged PCC pavements can be recycled into new surface courses that meet strength requirements and have the same cyclic load carrying (fatigue) characteristics as those constructed with virgin sand content - 42 percent.
Download or read book Recycling Portland Cement Concrete Pavement written by A. D. Halverson and published by . This book was released on 1982 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Portland Cement Concrete Pavements for Country Roads written by Charles Henry Moorefield and published by . This book was released on 1915 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observations of Portland cement concrete and porous friction course pavement construction written by and published by . This book was released on 1977 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Portland Cement Concrete Resurfacing written by Kenneth H. McGhee and published by Transportation Research Board. This book was released on 1994 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis report will be of special interest to pavement designers, materials engineers, and others seeking information on portland cement concrete resurfacings (overlays) placed over both portland and asphalt cement concrete pavements. Information is presented on the various practices in use for the design, material selection, and construction techniques associated with each pavement type. Additional information is provided on resurfacing experience and performance, including an Appendix cataloging more than 700 existing resurfacing projects in North America. Transportation agencies in the United States are continuing to develop pavement management systems which take an objective and structured approach to life-cycle cost analysis requirements for pavement rehabilitation project analysis. This report of the Transportation Research Board also discusses the considerations involved in the selection of technically feasible resurfacing alternatives. Based on the longitudinal experience of 375 resurfacing projects that were cataloged in 1982 and the more than 700 projects identified in 1993, much useful information on the performance characteristics of portland cement concrete resurfacing is presented.
Download or read book Proceedings of the National Seminar on PCC Pavement Recycling and Rehabilitation written by and published by . This book was released on 1982 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 25 papers presented at the National Seminar on Portland Cement (PCC) Pavement Recycling and Rehabilitation are reproduced in this report. The seminar was held in St. Louis, Missouri, September 27-30, 1981, and was attended by 219 people from national, state, and local governments, as well as industry and academia. These proceedings cover all aspects of PCC pavement recycling and rehabilitation, including condition surveys, jacking, drainage, joint repair, profile correction, bonded overlays, and load transfer restoration for both urban and rural situations. Cost and energy considerations, specifications, quality control, and environmental considerations were addressed. Equipment of all types was discussed and research currently underway was reviewed.
Download or read book Evaluation of Texture Requirements for Portland Cement Concrete Pavements written by Alvin Harold Meyer and published by . This book was released on 1985 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Summary of Lessons Learned from the MDOT MEPDG Materials Library Study written by Robert S. James and published by . This book was released on 2010 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
