Download or read book Embankment Construction Without Moisture density Control written by and published by . This book was released on 1967 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Embankments with and Without Moisture Density Control written by Herbert N. Swanson and published by . This book was released on 1974 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book QA QC of Subgrade and Embankment Construction written by Eshan Ganju and published by . This book was released on 2015-09-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Dynamic Cone Penetrometer (DCP) is a device that is used for the estimation of in situ compaction quality of constructed subgrades and embankments. It is a relatively inexpensive, light-weight and easy to use device that measures the dynamic penetration resistance of the compacted soil, from which an estimate of soil strength and stiffness characteristics can be made. Owing to its ease of use, many DOTs in the U.S. have employed the DCP in their compaction quality control procedures, and over the past few decades, extensive research has been carried out on the development of correlations between the results of the DCP test and the results of strength and stiffness tests performed on compacted soils (e.g., California bearing ratio, and resilient modulus)The objectives of this research are to refine DCP-based quality assurance and quality control correlations for compaction quality control developed by previous research studies carried out at Purdue for the Indiana Department of Transportation, especially focusing on (1) grouping of the soils based on their mechanical response to the DCP loading, and (2) limiting the in situ moisture range of the soils used for development of correlations within -2% of the optimum moisture content of the tested soil. The factors outlined above are studied, and in particular, soil grouping is examined critically. The AASHTO ('A-based') classification employed previously for classification of soils is replaced with a new classification criteria specifically developed for the DCP test. Soils are grouped into one of the two categories of coarse-grained or fine-grained soils on the basis of the size of the dominant particle in the soil. The criteria developed for the classification of soil into one of these two categories is based on index properties of the soil, such as the standard Proctor maximum dry density, optimum moisture content, plasticity index (PI) and fines content.
Download or read book An Introduction to Construction Control for Embankment Dams for Professional Engineers written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2022-01-08 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for civil engineers, geotechnical engineers and construction managers interested in construction of embankment dams. Here is what is discussed: 1. FOUNDATION TREATMENT, 2. COMPACTED EARTHFILL, 3. COMPACTED PERVIOUS FILL, 4. SEMIPERVIOUS FILL, 5. ROCKFILL, 6. RIPRAP, 7. MISCELLANEOUS FILLS, 8. INSTRUMENT INSTALLATIONS, 9. RECORDS AND REPORTS., 10. CONTROL CRITERIA.
Download or read book Construction of Embankments written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1971 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects FP 69 written by United States. Bureau of Public Roads and published by . This book was released on 1969 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Embankment Quality Phase I Report written by and published by . This book was released on 1998 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase I was initiated as a result of internal Iowa Department of Transportation (Iowa DOT) studies that raised concerns about the quality of embankments being constructed. Some large embankments have recently developed slope stability problems. In addition, pavement roughness has been noted shortly after roads were opened to traffic. This raised the question as to whether the current Iowa DOT embankment construction specifications are adequate. The primary objective of Phase I was to evaluate the quality of embankments being constructed under the current Iowa DOT specifications. The project was initiated in May 1997 with a tour of several embankment projects being constructed around the state. At each of these projects the resident construction engineer, field inspector, and contractor were interviewed with respect to their opinion of the current specifications. From construction observations and discussion during these visits it became obvious that there were problems with the current embankment construction specifications. Six embankment projects were selected for in-depth analysis and to represent the full range of soil types being used across the state. The results of Phase I field and laboratory construction testing and observations and post construction testing are presented in this report. Overall evaluation of the results of Phase I indicate that Iowa is not consistently obtaining a quality embankment constructed under the current Iowa DOT specifications. Based on these results, recommendations are made for Phase II to evaluate alternative specifications and develop rapid field methods for compaction control and soil identification.
Download or read book Report No FHWA RD written by United States. Federal Highway Administration. Offices of Research and Development and published by . This book was released on 1979 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Embankment Quality and Assessment of Moisture Control Implementation written by David J. White and published by . This book was released on 2016 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: A specification for contractor moisture quality control (QC) in roadway embankment construction has been in use for approximately 10 years in Iowa on about 190 projects. The use of this QC specification and the development of the soils certification program for the Iowa Department of Transportation (DOT) originated from Iowa Highway Research Board (IHRB) embankment quality research projects. Since this research, the Iowa DOT has applied compaction with moisture control on most embankment work under pavements. This study set out to independently evaluate the actual quality of compaction using the current specifications. Results show that Proctor tests conducted by Iowa State University (ISU) using representative material obtained from each test section where field testing was conducted had optimum moisture contents and maximum dry densities that are different from what was selected by the Iowa DOT for QC/quality assurance (QA) testing. Comparisons between the measured and selected values showed a standard error of 2.9 lb/ft3 for maximum dry density and 2.1% for optimum moisture content. The difference in optimum moisture content was as high as 4% and the difference in maximum dry density was as high as 6.5 lb/ft3 . The difference at most test locations, however, were within the allowable variation suggested in AASHTO T 99 for test results between different laboratories. The ISU testing results showed higher rates of data outside of the target limits specified based on the available contractor QC data for cohesive materials. Also, during construction observations, wet fill materials were often observed. Several test points indicated that materials were placed and accepted at wet of the target moisture contents. The statistical analysis results indicate that the results obtained from this study showed improvements over results from previous embankment quality research projects (TR-401 Phases I through III and TR-492) in terms of the percentage of data that fell within the specification limits. Although there was evidence of improvement, QC/QA results are not consistently meeting the target limits/values. Recommendations are provided in this report for Iowa DOT consideration with three proposed options for improvements to the current specifications. Option 1 provides enhancements to current specifications in terms of material-dependent control limits, training, sampling, and process control. Option 2 addresses development of alternative specifications that incorporate dynamic cone penetrometer or light weight deflectometer testing into QC/QA. Option 3 addresses incorporating calibrated intelligent compaction measurements into QC/QA.
Download or read book A Rapid Method of Construction Control for Embankments of Cohesive Soil written by Jack W. Hilf and published by . This book was released on 1959 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Approach to Embankment Construction Control written by John Vrymoed and published by . This book was released on 1985 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the Committee on Compaction of Subgrades and Embankments written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1947 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SCS National Engineering Handbook Construction inspection chapter 1 Introduction chapter 2 Construction surveys chapter 3 Installation chapter 4 Sampling and testing chapter 5 Records and reports chapter 6 Technical references written by United States. Soil Conservation Service and published by . This book was released on 1959 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Embankment Dams written by United States. Bureau of Reclamation and published by . This book was released on 1991 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Construction Testing of Embankment Materials Containing Large Particles written by and published by . This book was released on 1988 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report on Construction Control and Embankment Construction San Antonio Dam San Antonio Creek California written by Joseph C. Sciandrone and published by . This book was released on 1957 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Embankment Quality written by and published by . This book was released on 1999 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
