Search:

Results 51 to 60 of 89 | « previous |

Design pamphlet for the determination of layered elastic moduli for flexible pavement design in support of the 1993 AASHTO Guide for the design of pavement structures / by Von Quintus, H. L.(Harold L.)(CARDINAL)310791; Killingsworth, Brian M.(Brian Mark),1967-(CARDINAL)311392; United States.Federal Highway Administration.(CARDINAL)139839; Brent Rauhut Engineering, Inc.(CARDINAL)311391;
Includes bibliographical references (page 25).Final report.Performed by Brent Rauhut Engineering Inc. under contract no.
Subjects: Technical reports.; Pavements, Asphalt; Pavements, Asphalt; Pavements, Flexible; Pavements;

Corrosion protection : concrete bridges / by Virmani, Yash Paul.(CARDINAL)317090; Clemeña, G. G.(Gerardo G.)(CARDINAL)314479; United States.Federal Highway Administration.Office of Engineering & Highway Operations Research and Development.(CARDINAL)286896; Turner-Fairbank Highway Research Center.(CARDINAL)286897;
Includes bibliographical references (pages 60-67).Introduction -- Accomplishments -- History -- Objectives -- Results: Corrosion control in new concrete constructions -- Results: Corrosion control for rehabilitation of existing concrete structures -- Summary -- References.Final report.Recognizing the burden that reinforcing steel corrosion imposes on natural resources, the Federal Highway Administration established Corrosion Protection for Concrete Bridges as one of the high-priority areas (HPAs) in its Structures Research Program. This report summarizes the progress made through research efforts conducted under these programs. The results presented cover (A) corrosion control in new concrete constructions (adequate concrete cover, quality concrete, rebar coatings, corrosion inhibiting admixtures, and corrosion protection of prestressed concrete bridge members) and (B) corrosion control for rehabilitation of existing concrete structures (conventional rehabilitation methods, cathodic protection, and electrochemical removal of chloride).
Subjects: Technical reports.; Concrete bridges; Corrosion and anti-corrosives.; Epoxy coatings.; Reinforced concrete; Reinforcing bars;

Design pamphlet for the backcalculation of pavement layer moduli in support of the 1993 AASHTO Guide for the design of pavement structures / by Von Quintus, H. L.(Harold L.)(CARDINAL)310791; Killingsworth, Brian M.(Brian Mark),1967-(CARDINAL)311392; United States.Federal Highway Administration.(CARDINAL)139839; Brent Rauhut Engineering, Inc.(CARDINAL)311391;
Includes bibliographical references (pages 25-26).Final report.Performed by Brent Rauhut Engineering Inc. under contract no.
Subjects: Technical reports.; Nondestructive testing.; Pavements; Pavements;

Highway concrete pavement technology development and testing. by Aho, Brian D.(CARDINAL)286903; Boyd, Stephen R.(CARDINAL)286898; Darter, Michael I.(CARDINAL)286899; Janssen, Donald J.(Donald James),1956-(CARDINAL)286902; Krauss, P. D.(Paul D.)(CARDINAL)286905; Mallela, J.(CARDINAL)286904; Titus-Glover, Leslie.(CARDINAL)286901; Yu, H. Thomas.(CARDINAL)286900; United States.Federal Highway Administration.Office of Engineering & Highway Operations Research and Development.(CARDINAL)286896; Applied Research Associates.ERES Division.(CARDINAL)286894; Turner-Fairbank Highway Research Center.(CARDINAL)286897; University of Washington.(CARDINAL)141292; Wiss, Janney, Elstner, and Associates.(CARDINAL)286895;
Includes bibliographical references.Final report.Sponsored by Office of Engineering and Highway Operations R&D, Federal Highway Administration,
Subjects: Technical reports.; Alkali-aggregate reactions.; High strength concrete; Pavements, Concrete; Pavements, Concrete; Pavements;

Guide to developing performance-related specifications for PCC pavements / by Hoerner, Todd E.(CARDINAL)286954; United States.Federal Highway Administration.Office of Engineering & Highway Operations Research and Development.(CARDINAL)286896; ERES Consultants, Inc.(CARDINAL)286907; Turner-Fairbank Highway Research Center.(CARDINAL)286897;
Includes bibliographical references.v. 1. Practical guide, final report and Appendix A -- v. 2. Appendix B, field demonstrations -- v. 3. Apendixes C through F -- v. 4. Appendix G, PaveSpec 2.0 user guide.Final report.Sponsored by Office of Engineering R&D, Federal Highway Administration. Grant no.
Subjects: Technical reports.; Pavements, Concrete; Pavements, Concrete; Pavements, Concrete; Pavements;

The history of the prestressing strand development length equation / by Tabatabai, H.(Habib)(CARDINAL)319122; Dickson, Timothy J.; United States.Federal Highway Administration.Office of Engineering & Highway Operations Research and Development.(CARDINAL)286896; Construction Technology Laboratories (Portland Cement Association)(CARDINAL)286967;
Includes bibliographical references (pages 105-106).Introduction -- History of the development length equation -- Development length parametric study -- Summary -- Appendices -- References.Final report;A research study was conducted to determine the history of the AASHTO prestressing strand development length equation and to evaluate the significance, with respect to development length, of changes in the AASHTO provisions for the determination of steel stress at ultimate flexural strength. The accuracy of the AASHTO provisions in determining steel stress at ultimate flexural strength was also evaluated for a number of typical cross sections used in bridge construction. The strand development length equation was first introduced in the 1963 ACI Building Code and was adopted by AASHTO in 1973. The original research that formed the basis for the equation was conducted at the Portland Cement Association (PCA) in the late 1950s and early 1960s.Sponsored by Office of Engineering and Highway Operations R&D, Federal Highway Administration, under contract no.
Subjects: Technical reports.; Concrete bridges; Prestressed concrete construction.; Tendons (Prestressed concrete);

Delineation of hazards for older drivers / by Lerner, Neil D.(CARDINAL)312178; United States.Federal Highway Administration.(CARDINAL)139839; Comsis Corporation.(CARDINAL)164780;
v. 1 [No special title] -- v. 2. Appendixes.Final report;The objective of this research project was to identify conspicuity, recognizability, and comprehensibility problems with object markers, particularly as they relate to the needs and capabilities of the older driver. This was accomplished through a series of tasks and three sets of experiments (problem identification, laboratory and field studies) which determined through empirical research the effect of selected enhancements on the design and implementation of current object markers.Sponsored by Office of Safety and Traffic Operations R + D, Federal Highway Administration, under contract no.
Subjects: Technical reports.; Hazard signs; Human engineering.; Older automobile drivers; Roads; Traffic signs and signals;

Uniform traffic control and warning messages for portable changeable message signs / by Knoblauch, Richard L.(CARDINAL)311186; United States.Federal Highway Administration.Office of Safety and Traffic Operations Research and Development.(CARDINAL)172825; Center for Applied Research (Great Falls, Va.)(CARDINAL)311183; Turner-Fairbank Highway Research Center.(CARDINAL)286897;
Includes bibliographical references (page 67).Development of candidate messages -- Laboratory testing of candidate messages -- Field testing of candidate messages -- Recommended CMS messages -- Appendix A -- References.Final report;The objective of this study was to develop and test word and symbol traffic control and hazard messages for portable changeable message signs (PCMSs). The messages were designed for the standard PCMS with three lines of eight characters. First, a comprehensive listing of candidate PCMS messages was developed. This was done by interviewing State highway engineers, surveying PCMS manufacturers and questioning motorists. In those situations where subjects did not express an overwhelming sign preference additional field testing was done. The detection distances of the candidate messages were determined using a PCMS under both day and night conditions.Performed by Center for Applied Research, Inc. for the Office of Safety and Traffic Operations, Research & Development, Federal Highway Administration, under contract no.
Subjects: Technical reports.; Roads; Traffic signs and signals;

Achieving a high level of smoothness in concrete pavements without sacrificing long-term performance / by Perera, Rohan W.(CARDINAL)320143; Kohn, Starr D.(CARDINAL)286966; Tayabji, S. D.(Shiraz D.)(CARDINAL)286938; United States.Federal Highway Administration.Offices of Research, Development, and Technology.(CARDINAL)286927; Construction Technology Laboratories (Portland Cement Association)(CARDINAL)286967; Soil and Material Engineers, Inc.(CARDINAL)286965; Turner-Fairbank Highway Research Center.(CARDINAL)286897;
Includes bibliographical references (pages 197-199).Technical summary available online.Final report;Performed by Soil and Materials Engineers, Inc. and Construction Technology Laboratories, Inc. for Federal Highway Administration under contract no.
Subjects: Technical reports.; Pavements, Concrete; Roads; Pavements; Portland cement;

Determining soil volumetric moisture content using time domain reflectometry / by Klemunes, John A.(CARDINAL)320539; United States.Federal Highway Administration.Office of Engineering Research and Development.; Turner-Fairbank Highway Research Center.(CARDINAL)286897;
Includes bibliographical references (pages 65-68).Introduction -- Literature review -- Laboratory procedure -- Phase I study -- Phase II study -- Conclusions -- Recommendations -- References.Final report;Time domain reflectometry (TDR) is a technique used to measure indirectly the in situ volumetric moisture content of soil. The purpose of this study is to enhance the predictive accuracy of in situ volumetric moisture content estimation from TDR measurements. The study is divided into two phases. The initial phase evaluates the five known methods of analyzing the apparent length of TDR responses to determine which provides the most accurate method for estimating the volumetric moisture content. Phase II, through a mixing model form, regresses the volumetric properties of the soil and the apparent length of the TDR response to obtain a predicted volumetric moisture content.Performed and sponsored by Office of Engineering R & D, Federal Highway Administration.
Subjects: Technical reports.; Soil moisture; Soil moisture;

Results 51 to 60 of 89 | « previous |