Download or read book Determination of Influences on Support Strength of Crushed Aggregate Base Course Due to Gradational Regional and Source Variations written by Paul Eggen and published by . This book was released on 2004 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wisconsin Transportation Research written by and published by . This book was released on 2001 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Base Compaction Specification Feasibility Analysis written by and published by . This book was released on 2012 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to establish the technical engineering and cost analysis concepts that will enable WisDOT management to objectively evaluate the feasibility of switching construction specification philosophies for aggregate base. In order to accomplish this goal, field and laboratory testing programs were conducted on existing HMA pavements and on base layers under construction as well as comprehensive survey was conducted on highway agencies practices pertaining to base layer construction in the U.S. and Canada. This research proposed construction specifications for aggregate base course layers.
Download or read book Investigation of Testing Methods to Determine Long term Durability of Wisconsin Aggregates written by and published by . This book was released on 2013 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approximately 10 to 11 million tons of aggregates are utilized in transportation infrastructure projects in Wisconsin annually. The quality of aggregates has a tremendous influence on the performance and durability of roadways and bridges. In this Phase II research study, detailed statistical analyses were performed on over 1,000 sets of historical aggregate test results and the experimental results from the Phase I study. Test results from other states were analyzed as well. Aggregate tests were performed on 12 known marginal or poor Wisconsin aggregates to specifically address test performance of such aggregates. Selected aggregates were scanned using X-ray computed tomography to assess the effects of freeze-thaw and sodium sulfate exposure on the internal void system. The results of multi-parameter logistic regression analyses show that the pass/fail outcomes of the Micro-Deval test can be predicted when LA abrasion, absorption, and sodium sulfate soundness test results are known. The unconfined freeze-thaw test outcomes cannot be predicted from results of other tests (not correlated). Therefore, the unconfined freeze-thaw test should be part of any test protocol as it measures an aggregate characteristic that cannot be obtained from other tests. The percentiles associated with any proposed acceptance threshold limits for various aggregate tests should be determined using the statistical data provided.
Download or read book Suitability of Cement Kilm Dust for Reconstruction of Roads written by Jeremy S. Baugh and published by . This book was released on 2008 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gravel Roads written by Ken Skorseth and published by . This book was released on 2000 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Download or read book Effect of aggregate gradation on the strength and density of a crushed limestone pavement base course written by Charles Albert Machemehl and published by . This book was released on 1964 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characteristics of Graded Base Course Aggregates Determined by Triaxial Tests written by J. E. Gray and published by . This book was released on 1962 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Response of Crushed Stone Mixtures written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted in order to see the effects on material performance from varying the gradation of aggregate base course material. Five different gradations were selected which followed along the North Carolina Department of Transportationââ'¬â"¢s guidelines for acceptable aggregate base mixtures, specification section 1010. Experimental trials were performed in order to classify the material of aggregate base course and to judge the performance differences between five gradations. Those experiments included grain size distribution tests, specific gravity testing, Atterberg limits testing, particle shape analysis, compaction testing, both standard (3 in. diameter) and large (6in. diameter) unconsolidated undrained compression testing, and resilient modulus testing. Generally it was found that aggregate base course acts as a well graded gravel or sand with clay like fines. The gradation was found to affect the performance of the aggregate slightly in that coarser gradations gave better strength and resilience values under conditions most similar to those found in the field. From research and experience during the lab testing it was concluded that the coarsest blends became too difficult to realistically work with and they also lacked the stability of the more well graded gradations. It was also found that as the amount of fines in the specimens exceeded around 8% by mass, those fines governed the behavior of the material. Several recommendations are proposed for the adoption of new standards and for conducting future testing on aggregate base course material. It was concluded that the current standard was sufficient in providing fairly uniform and desirable behavior. It is recommended that the gradation be narrowed and shifted toward the lower bound of the current NCDOT standard in order to have even more predictable material behavior as well as to have the benefit of higher strength and resiliency.
Download or read book Highway Subdrainage Design written by Lyle K. Moulton and published by . This book was released on 1980 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Information Service and published by . This book was released on 1989 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook for Stabilization of Pavement Subgrades and Base Courses with Lime written by Dallas N. Little and published by . This book was released on 1995 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Aggregates Handbook Second Edition written by National Stone, Sand & Gravel Association and published by . This book was released on 2013-03-20 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Soils of South Vietnam written by United States. Army. Engineer Detachment (Terrain), 579th and published by . This book was released on 1966 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tests for Evaluating Degradation of Base Course Aggregates written by Terry R. West and published by Highway Research Board. This book was released on 1970 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was undertaken to develop procedures for predicting the amount and effects of degradation for different natural aggregates when used in a roadway base or subbase course, and thereby for determining their suitability, aggregate samples were collected from 140 quarries in 12 states, divided into four classes (carbonates and clastic sedimentaries, coarse-grained igneous and metamorphics, basalts and basalt-like rocks, and heterogenous gravels), and submitted to eight tests: percent loss, Los Angeles abrasion; freeze-thaw loss; specific gravity, percent absorption; insoluble residue; differential thermal analysis; x-ray diffraction analysis; and petrographic analysis, including a battery of tests for polished and thin section. Test conclusions regarding the four classes are given and discussed, and detailed data on samples are tabulated in appendices.
Download or read book AASHTO Guide for Design of Pavement Structures 1993 written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 1993 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.
Download or read book Superpave Mix Design written by Asphalt Institute and published by . This book was released on 2001-01-01 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
