The study was initiated to evaluate the performance of recycled bituminous material as the base course of reconstructed county roads. The cold recycling process has been used in recent years by Elkhart County, Indiana to upgrade sections of distressed roads. The evaluation is based on a comparison of the material from laboratory extraction and grad
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The use of incinerator residue as an aggregate in a bituminous base (termed littercrete) was studied. Test sections consisting of the experimental hot mixed littercrete base and a conventional hot mixed asphaltic concrete base (termed blackbase control) and topped with a conventional surface were placed on a city street in Houston, Texas. This repo
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This handbook is a compendium of applicable concepts, technology, and practices dealing with the improvement of safety and efficiency of railroad-highway grade crossings. It is written in easy to understand language and is for use by engineers and others engaged in the planning and design of grade crossings.
This manual presents procedures and guidelines applicable to the use of the cone penetration test. Dr. Schmertmann prepared this manual in February 1977 and made minor additions in May 1978. It represents his interpretation of the state-of-the-art in Dutch static cone testing as of February 1977. Its contents should provide assistance and uniformit
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This asphalt concrete recycling project, the first attempted by the Washington State Department of Transportation, seems so far to be very successful. The project looks good from a standpoint of economy, energy use, conservation of natural resources, feasibility of construction, and from an evaluation of the test data obtained to date. Certain pitf
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This report is the first of a two volume series titled, "Highway Air Quality Impact Appraisals-Volume I, Introduction to Air Quality Analyses, and Volume II, Guidance for Highway Planners and Engineers." These two reports are intended to provide transportation planners and engineers with guidance on how to perform air quality analyses. Volume I pre
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This report is the second of a two volume series titled, "Highway Air Quality Impact Appraisals--Volume I, Introduction to Air Quality Analyses, and Volume II, Guidance for Highway Planners and Engineers." These two reports are intended to provide transportation planners and engineers with guidance in how to perform air quality analyses. This volum
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This paper includes moisture-density-strength screening tests performed on several additional chemicals and an evaluation of the standard AASHTO T-99 moisture-density tests results performed on soil specimens prepared under varying conditions of drying, pulverization, and re-use. Theory and applicability of project use of the Iowa K-Test for determ
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Soil is man's cheapest and most abundant construction material, and compaction is the most widely used method of strengthening soils and making them suitable for construction uses. The technology of compaction, while improving, remains largely in a trial and error state, emphasizing the basic moisture-density relationships discovered by R.R. Procto
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A plow-resistant recessed reflective marker (RRM) delineation system having a linear tapered profile and which uses a reflector base/reflector unit is proposed. A single-operator mechanized vehicle to install the RRM delineation system is described. This vehicle satisfies the design criteria which are given in the report. The apparatus automaticall
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The objective of this report is to provide an overview of recent FHWA research on the subject of improving the effectiveness and utilization of roadway delineation. The report summarizes the results of 6 recent major studies and related efforts, interprets and synthesizes their findings, identifies gaps, and provides information and advice which ca
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The Fracture Control Plan (FCP) deals with bridges containing fracture critical members so they can hardly be classed as a "general run of bridge". Brevity, nevertheless, is desirable in any code providing the code exercises the necessary controls. The FCP as written is based primarily on the American Welding Society's AWS D1.1 Structural Welding C
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The following Special Provisions for "fracture-critical -members constitute a modification of the following publications: (1) the American Welding Society (AWS) Structural Welding Code AWS D1.1-Rev. 2-77, (2) the American Association of State Highway and Transportation Officials (AASHTO) Standard Specifications for Welding of Structural Steel Highw
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The following is a digest of the American Welding Society (AWS) Structural Welding Code, as amended, for fracture-critical members. With the amendments, this is far more than a welding code; it is in fact a fracture control plan encompassing design, materials specification, and inspection, as well as detailed welding requirements. As a digest, the
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United States. Federal Highway Administration. Demonstration Projects Division
1978-06-01
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PDF
The densification of cohesionless granular soils with vibratory equipment is a well-known construction procedure. The development of a special probe, called a Vibroflot, to densify such soils at depth was the beginning of the method known as Vibroflotation. The original Vibroflot was developed and patented in Germany more than 45 years ago. The mec
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