Download or read book The Influence of Natural Sand Fine Aggregate on Some of the Properties of Hardened Concrete Mortar written by W. P. Chamberlin and published by . This book was released on 1965 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Natural Sand Fine Aggregate on Some of the Properties of Hardened Concrete Mortar written by W. P. Chamberlin and published by . This book was released on 1965 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes a laboratory study of twenty-five New York natural sands, and their affect on the freeze-thaw durability, drying shrinkage and water requirement of hardened concrete mortar and, by inference therefore, hardened concrete. The purpose of the study was to define significant aggregate properties and to suggest practical methods of measuring them.
Download or read book Highway Research News written by and published by . This book was released on 1965 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues for 1963- include section: Urban transportation research digest.
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1966-11 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highway Research Record written by and published by . This book was released on 1968 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1966-12 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hardened Cement Pastes of Low Porosity written by Stephen Brunauer and published by . This book was released on 1969 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Length changes were measured for low-porosity hardened portland cement pastes obtained from a Type I clinker using two different grinding aids, and from a Type II clinker using four. The water-cement ration was 0.2. Curing times for most pastes were 1 and 28 days. The pastes were exposed to a relative humidity of 42.7 percent, and for 30 days length was measured at intervals of 1 day or more. The results showed 1) that the type II pastes exhibited considerably less shrinkage than the Type I pastes after 1 day of curing, but that after 28 days differences in shrinkage were slight, 2) that the shrinkage differences due to different grinding aids were slight, 3) that pastes of clinkers ground to specific surfaces of about 6500 cm2/g showed less shrinkage than those of clinkers ground to higher surfaces, and 4) that the low-porosity pastes made from the same cement with a water-cement ratio of 0.4, and one-fourth to one-third as large as those made with a water-cement ration of 0.6. The main conclusion is that volume changes can be greatly reduced by using low-porosity cement pastes.
Download or read book Highway Research Abstracts written by and published by . This book was released on 1974 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Fine aggregate Grading on Properties of Concrete written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1962 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highway Research in Progress written by and published by . This book was released on 1967 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geodex Structural Information Service written by Geodex International and published by . This book was released on 1966 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Asphalt Cement Viscosity and Penetration written by Michael S. Zdeb and published by . This book was released on 1970 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt cements supplied to New York State during 1968 were surveyed, comparing penetration and viscosity. The advantages and disadvantages of viscosity grading were examined. Over 200 samples of 85-to-100 penetration grade asphalt were tested to establish the actual relationship between viscosity and penetration in the Department of Transportation's ten administrative regions. Although penetration was quite uniform, viscosities in the eastern portion of the state averaged 50-percent higher than in the west. Overlapping of the two viscosities, as found in central New York, could lead to construction difficulties.
Download or read book Early Hardening of Asphalt Cement written by William H. Clark (III) and published by . This book was released on 1968 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rates and causes of asphalt hardening were investigated to determine its effect on pavement performance. Hardening of 46 New York State pavements, ranging in age from construction through 16 years of service, was studied by recovering asphalt cements by the Abson method and performing penetration tests on recovered material. It was found that early hardening is not a problem in New York State and that penetrations of asphalt cement recovered from top courses correlate with pavement performance (although penetration decreases with time, each pavement differs in rate of hardening). A regression analysis demonstrated the significance of the following factors (in order of importance) in the mechanism of asphalt hardening: percent voids in the mineral aggregate filled with asphalt cement, bitumen index and average annual daily traffic. A brief review of the state of the art in testing for asphalt cement properties is appended.
Download or read book Computer Simulation for Quality Assurance in Asphaltic Concrete Production written by Norman F. Bolyea and published by . This book was released on 1969 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The New York State Department of Transportation's Engineering Research and Development Bureau has developed a computer simulation of asphaltic concrete production, for evaluation and improvement of quality assurance. As far as can be determined, this is the first simulation directed towards formulating a quality assurance program for blending of bulk materials. The model consists of a set of random data generators simulating hot bin and final mix gradations. Drift from the plant mean caused by production fluctuations can be introduced into the process, with the drift's starting pint, duration, and magnitude determined randomly. Operating characteristics are determined for any quality assurance method by simulating numerous and different plants--which are representative of normal production--and by adjusting quality assurance parameters for various testing strategies. With the increasing complexity of testing schemes, evaluation by simulation is the only feasible method of analysis. This technique is used to develop operating characteristic data for a quality assurance program as applied to standard top course mix. The basic model is in generalized form, with all mix characteristics entered by the user. It is applicable to any mix for which proper distributions can be formulated. The program is written in FORTRAN IV, and with only minor file card adjustments, may be run on either the Burroughs B5000 or the IBM 360 computers. This discussion briefly covers the background of the computer simulation and evaluation of one proposed quality assurance program. A full report on building the simulation model, along with program listings, is also available for the engineer who is familiar with statistical methods.
Download or read book Pressure Relief Joints for Rigid Pavements written by D. E. Gordinier and published by . This book was released on 1969 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Major and minor types of blowup are defined and illustrated. The effects on highway bridges of pressures exerted as a consequence of approach pavement blowups are examined. Examples of conditions preceding serious bridge damage are shown. It is concluded that the primary cause of blowups is filling of pavement joints with incompressible materials, which prevent them from closing during warm weather. Four types of relief joint are developed by the Iowa State Highway Commission is recommended. This consists of sawing and removing 4 in. of pavement and filling the space with a rigid, foamed urethane. Conditions warranting this joint's use are described.
Download or read book Engineering Research Series Research Report RR written by New York (State). Engineering Research and Development Bureau and published by . This book was released on 1975 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pavement marking paints written by and published by . This book was released on 1970 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
