Download or read book Soil Compaction and Proof rolling of Subgrades written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1960 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paper 1: The object of this paper is to give a brief outline of the test installation and techniques employed at the road research laboratory in carrying out the full-scale compaction tests and to give a summary of the main results obtained in the investigations. Paper 2 shows the cases where proof-rolling will be effective and those cases where it will not. Paper 3 deals with the use of flowing water as a compacting and stabilizing agent. Paper 4 presents a new approach to liquid limit determinations by a one-point procedure. Necessary equations, charts and tables, developed on the AASHO road test and easily usable by technicians, are presented.
Download or read book Proof Rolling of Foundation Soil and Prepared Subgrade During Construction written by Phillip Dunston and published by . This book was released on 2018-02 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 16. AbstractProof rolling provides a method to examine the entire subgrade surface as a compliment to standard random acceptance testing. Proof rolling requires established criteria that account for the interplay of equipment parameters and soil characteristics, technique, and other specifics of the project to allow for proper interpretation. The researchers concluded that proof rolling is not appropriate for determining soil elastic properties, while it can reveal in situ strength properties. No information from state highway agencies (SHA) publications or interviews reports using proof rolling other than for the evaluation of the subgrade. Only eight SHA¿s have notable specifications or other supporting documents containing significant guidance or criteria. The requirements provided for use of either of two equipment types¿tandem-axle rear dump trucks and chariot-style rollers¿and a range of evaluation criteria based on soil type and whether the project is new construction or re-construction. Recommendations provided fall within parameters practiced by states that have the most well-developed specifications and practices for proof rolling. The recommendations include: evaluation is of the subgrade only and the equipment shall be either a tandem-axle rear dump truck or a tri-axle rear dump truck (with raised third axle) loaded to a minimum gross weight of 20 tons. The chariot-style roller loaded to a minimum gross weight of 40 tons could be alternatively specified. The test shall be a single pass in each traffic lane with the passing criteria of a 1¿ deflection for new construction and 1⁄2¿ deflection for re-constructed or stabilized subgrade, as well as the absence of pumping and cracking.
Download or read book Soil Compaction Investigation written by Waterways Experiment Station (U.S.) and published by . This book was released on 1950 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Compaction and Proof Rolling of Subgrades written by Highway Research Board National Research Council Staff and published by . This book was released on with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Compaction Investigation written by Waterways Experiment Station (U.S.) and published by . This book was released on 1949 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Compaction and Proof Rolling of Subgraces written by F. Burggraf and published by . This book was released on 1960 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Establishment of Subgrade Undercut Criteria and Performance of Alternative Stabilization Measures written by Roy H. Borden and published by . This book was released on 2010 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scope of this research includes the development of criteria to define the need for undercutting, the depth of the undercut, and the quality of the backfill material such that the cost and performance are optimized. In addition, chemical stabilization ahd geosynthetics reinforcement, in combination with several thicknesses of the ABC were studied to provide comparative criteria for the enhancement of various poor subgrade soils encountered in N.C. with, or in lieu of, undercut and replacement with select fill. The criteria are presented along with the associated relative costs of each alternative.
Download or read book Soil Compaction Investigation written by Waterways Experiment Station (U.S.) and published by . This book was released on 1963 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Compaction Investigation written by and published by . This book was released on 1947 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Compaction Investigation written by Jim W. Hall and published by . This book was released on 1968 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book compaction of soils written by and published by ASTM International. This book was released on 1988 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Intelligent Compaction Technology for Densification of Roadway Subgrades and Structural Layers written by and published by . This book was released on 2010 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Compaction Investigation written by Waterways Experiment Station (U.S.) and published by . This book was released on 1949 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Intelligent Compaction Control of Highway Embankment Soil in Kansas written by Farhana Rahman and published by . This book was released on 2008 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanistic pavement design procedures based on elastic layer theory require characterization of pavement layer materials including subgrade soil. This paper discusses the subgrade stiffness measurements obtained from a new compaction roller for compaction control on highway embankment projects in Kansas. Three test sections were compacted using a single, smooth steel drum intelligent compaction (IC) roller that compacts and simultaneously measures stiffness values of the compacted soil. Traditional compaction control measurements such as, density, in-situ moisture content, soil stiffness measurements using soil stiffness gage, surface deflection tests using the Light Falling Weight Deflectometer (LFWD) and Falling Weight Deflectometer (FWD), and penetration tests using a Dynamic Cone Penetrometer (DCP), were also done. The results show that the IC roller was able to identify the locations of lower soil stiffness in the spatial direction. Thus the IC roller can be used in proof rolling. IC roller stiffness showed sensitivity to the field moisture content indicating that moisture control during compaction is critical. No universal correlation was observed among the IC roller stiffness, soil gage stiffness, backcalculated subgrade moduli from the LFWD and FWD deflection data, and the California Bearing Ratio (CBR) obtained from DCP tests. The discrepancy seems to arise from the fact that different equipment were capturing response from different volumes of soil on the same test section. Analysis using the newly released Mechanistic-Empirical Pavement Design Guide (M-EPDG) shows that pavement rutting, roughness and asphalt base thickness are significantly influenced by the subgrade strength. "Target" modulus for compaction quality control can also be obtained by this analysis.
Download or read book Soil comapction investigation written by U. S. Army. Corps of Engineers and published by . This book was released on 1950 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Subgrade Deflection Acceptance Criteria written by James A. Crovetti and published by . This book was released on 2002 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Compaction for Buildings written by Federal Construction Council. Task Group T-36 on Soil Compaction for Buildings and published by . This book was released on 1960 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
