Download or read book A Modified Procedure for Measuring the Maximum Specific Gravity of Bituminous Paving Mixtures written by I. Ishai and published by . This book was released on 1979 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: An accurate measurement of the maximum specific gravity of bituminous paving mixtures Gmm is needed for a reliable air voids analysis of the mixtures in the design and control phases. Since most actual bituminous mixtures combine absorptive aggregates, some difficulties have been encountered with the use of some current procedures for measuring Gmm. This paper presents a procedure for measuring the maximum specific gravity with the use of methanol. The good wetting ability of the methanol, together with its insignificant dissolvent characteristic, enables it to be used as a volumetric liquid for realistic measurements of Gmm. These properties eliminate the difficulties in expelling the trapped air bubbles even without vacuum as well as ensure almost no asphalt dissolution and thus no penetration of liquid inside the aggregate surface voids that are impermeable to asphalt. In general, the test was found to be fast and simple, with highly repeatable results.
Download or read book Maximum Theoretical Specific Gravity of Bituminous Paving Mixtures written by Robert R. Johnson and published by . This book was released on 1987 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Testing and Evaluation written by and published by . This book was released on 1980 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Standard Test Method for Theoretical Maximum Specific Gravity and Density of Bituminous Paving Mixtures written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Evaluation of the Supplemental Procedure of the Maximum Specific Gravity Test for Bituminous Paving Mixtures written by K. D. Stuart and published by . This book was released on 1990 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to investigate the effects of performing the supplemental procedure of AASHTO T 209 (or ASTM D 2041) on the per cent air voids, the effective aggregate specific gravity, and the maximum specific gravity of a bituminous paving mixture, using both thoroughly coated aggregates and partially coated aggregates. The supplemental procedure should correct the test data for water absorbed into the aggregate during the test. Although the supplemental procedure can be used when designing mixtures, it is most often used for determining the maximum specific gravities of moisture damaged pavement samples, or cores or specimens where sawing has exposed a significant amount of aggregate. The majority of aggregates used in this study had water absorptions below 2.5 per cent and thus were not highly absorptive.
Download or read book Transportation written by and published by . This book was released on 1979 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Maximum Theoretical Specific Gravity of a Bituminous Mixture by Solvent Immersion written by Paul J. Serafin and published by . This book was released on 1957 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the past number of years the Michigan State Highway Dept. has been investigating voids in bituminous mixtures. During this study a method was developed which consists of placing a bituminous mixture in a large pycnometer and introducing a solvent that dissolves the asphalt, thereby liberating the air voids in the mass. From the weights of the sample and the solvent used, the specific gravity of the voidless bituminous mixture can be determined by calculation. The pycnometer consists of a 1000-ml Erlenmeyer flask with a 1 1/2-in. ground glass opening in which is fitted a top with a restricted neck for more precise volume measurement. Volume measurements must be precisely controlled at specific temperatures in order to minimize errors due to the thermal volume changes of the solvent. The paper describes the procedure and illustrates the calculation. Data are presented to show the repeatability of the method on the different types of materials from which bituminous mixtures are normally made. Also a comparison is made with the conventional method of determining specific gravity of aggregates.
Download or read book Measurement of Bituminous Concrete Core Specific Gravities and Specific Gravities of Bituminous Coated Coarse Aggregates by Means of a Volumeter written by L. E. Grimmer and published by . This book was released on 1957 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Need for a means to control pavement denseness for bituminous concrete construction in Ohio was indicated several years ago by failure of some late season paving. The paving that failed carried up to 20 per cent voids into the winter. Such paving was easy prey to freezing and thawing, and stripping. The proportion of paving that failed to the total paving was small for any one construction season, although one single course resurfacing was almost entirely lost. While it is most important to correct conditions causing critical void contents, consideration must first be given to the accurate measurement of void contents. Several methods are available for the measurement of paving density. Perhaps the most widely recognized is the ASTM method for the determination of specific gravity of compressed bituminous mixtures (D 1188). Data presented in this paper compare specific gravities of cores obtained by the ASTM method, modified by dipping cores in paraffin and time- of-dry weighing, with specific gravities of the same cores obtained by three other methods. Methods are also available to determine the specific gravity of bituminous coated aggregates. For aggregates nonabsorptive to both bituminous material and water, any of the specific gravities shown in ASTM methods of determining specific gravity of coarse and fine aggregates (C 127 and C 128) can be used to determine accurate theoretical maximum densities. For aggregates with bituminous material absorption equal to water absorption, bulk specific gravity from the above methods can be used to determine accurate theoretical maximum densities. A method was presented in 1942 by Nevitt and Krchma (1) to estimate the absorption of bituminous material for aggregates by their absorptions of kerosine. The same year Goshorn and Williams (2) presented a method for the direct measurement of the amount of bituminous material absorbed by aggregate immersed in bitumen. Each of these methods was most useful for voids computations when the method accurately indicated the amount of bituminous material absorption that occurred in aggregates as they were coated in the mix.
Download or read book Symposium on Specific Gravity of Bituminous Coated Agregates written by American Society for Testing Materials and published by . This book was released on 1957 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The SUPERPAVE Mix Design System Manual of Specifications Test Methods and Practices written by Edward T. Harrigan and published by Strategic Highway Research Program (Shrp). This book was released on 1994 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: The final product of the Strategic Highway Research Program (SHRP) Asphalt Research Program is the SUPERPAVE (registered trademark) mix design system for new construction and overlays. This system employs a series of new performance-based specifications, test methods, and practices for material selection, accelerated performance testing, and mix design. This report documents these new specifications and procedures in a format suitable for eventual American Association of State Highway and Transportation Officials (AASHTO) standardization.
Download or read book Research Report written by Ṭekhniyon, Makhon ṭekhnologi le-Yiśraʾel and published by . This book was released on 1979 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Standard Test Method for Theoretical Maximum Specific Gravity and Density of Asphalt Mixtures written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Marshall Method for the Design Control of Bituminous Paving Mixtures written by Marshall Consulting & Testing Laboratory, Jackson, Miss and published by . This book was released on 1949 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is the objective of this booklet to present a practical method for improving the quality of bituminous paving mixtures. The need for accomplishing this objective has become increasingly pressing with the recent advances in the designs of our transportation equipment. In these advanced designs are incorporated heavier loads, increased speeds, greater tire traction and braking action.
Download or read book Quality Management of Hot Mix Asphalt written by ASTM Committee D-4 on Road and Paving Materials and published by ASTM International. This book was released on 1996 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Maximum Specific Gravity of Bituminous Mixtures by Vacuum Saturation Procedure written by James M. Rice and published by . This book was released on 1957 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The laboratory of the National Crushed Stone Assn. has long been concerned with the specific gravity of aggregates for bituminous mixtures. About ten years ago, a limited study was undertaken in which four samples of coarse aggregate were coated with asphalt by dipping. The results indicated that the aggregates absorbed some asphalt, but the asphalt absorption was less than water absorption. Therefore, neither the bulk nor the apparent specific gravity values of the aggregate were applicable for computing the theoretical maximum density of a bituminous mix. In 1951, experiments were begun with the direct measurement of voids in compacted specimens by use of an air meter such as is used for measuring entrained air in concrete (1). While the equipment used was not particularly suited for this application, the results were encouraging. Still we were not completely satisfied with this procedure because there was always some doubt that all of the voids were being measured. The vacuum saturation procedure was first used in connection with the air meter tests on compacted specimens. This test was performed with the air meter chamber filled with water; thus, there was a possibility that the test specimen was absorbing some water while the equipment was being prepared. In order to minimize this source of error, specimens were initially saturated with water after evacuation of air. With porous mixtures it was found that this procedure filled practically all of the measurable voids.
Download or read book Measurement of Maximum Theoretical Specific Gravity of a Bituminous Mixture written by Paul J. Serafin and published by . This book was released on 1956 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
