Download or read book Symposium on Specific Gravity of Bituminous Coated Aggregates written by Symposium on Specific Gravity of Bituminous Coated Aggregates. 1956, Atlantic City, NJ. and published by . This book was released on 1957 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Specific Gravity of Bituminous Coated Aggregates written by H. T. Williams and published by . This book was released on 1957-01-01 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Development and Application of the Effective Specific Gravity of Bituminous Coated Aggregates written by Andrew H. Layman and published by . This book was released on 1957 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1949 the authors undertook an investigation dealing with the design of asphaltic concrete mixes. The work was of such nature that accurate per cent density determinations were highly desirable. Shortly after the work was started per cent densities were obtained which exceeded 100 per cent, using bulk specific gravity for the aggregate. Use of the apparent specific gravity gave densities which were obviously too low. In an effort to obtain more accurate results, a method was developed and employed termed the "effective specific gravity." Briefly, it is determined as follows: An asphaltic concrete specimen is made up with sufficient asphalt cement to overfill the voids in the compacted aggregate. The specific gravity of the molded specimen is obtained by the water immersion method. If the specific gravity of the asphalt cement is not known, it is determined by the pycnometer method. The effective specific gravity, ge, is calculated by means of the following equation: ge=100-Wa100Ge-Waga.(1) where: ge = effective specific gravity of aggregate in specimen at 77 F, Ge = specific gravity of molded specimen with voids overfilled, ga = specific gravity of asphalt at 77 F, and Wa = asphalt cement in specimen, per cent by weight.
Download or read book Symposium on Specific Gravity of Bituminous Coated Aggregates written by American Society for Testing Materials. Committee D-4 on Road and Paving Materials and published by . This book was released on 1957 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Specific Gravity of Bituminous Coated Aggregates written by and published by . This book was released on 1957 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Specific Gravity of Bituminous Coated Aggregates written by and published by . This book was released on 1956 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Specific Gravity of Bituminous Coated Aggregates written by and published by . This book was released on 1957 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Specific Gravity of Bituminous Coated Aggregates written by American Society for Testing Materials and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Specific Gravity of Bituminous Coated Aggregates written by ASTM Committee D-4 on Road and Paving Materials and published by . This book was released on 1956 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Density Absorption and Specific Gravity Tests of Aggregates Bituminous Materials Bituminous Mixtures and Surfaces Annotated written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1960 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Density Absorption and Specific Gravity Tests of Aggregates Bituminous Materials Bituminous Mixtures and Surfaces Annotated written by National Research Council (U.S.). Highway Research Board. Committee on Correlation of Density and Stability Tests of Bituminous Mixtures with Service Behavior and published by . This book was released on 1960 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Density Absorption and Specific Gravity Tests of Aggregates Bituminous Mixtures and Surfaces written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1960 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ungraded Aggregates in Bituminous Mixes written by and published by . This book was released on 1955 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect on clays and the stabilizing effect of damp clays on ungraded natural aggregates germinated an idea upon which a mortar theory for bituminous mixes might be based. This mortar theory, stated briefly, is the formation of thin films of bituminous binder upon the minute particles of a mineral dust to form a bituminous mortar, and the mortar so prepared to be used to bond aggregates together into a bituminous mixture suitable for paving purposes. In order to test the validity of the mortar theory as quickly as possible, known methods of producing such thin films were studied and the impact process selected for this purpose in further tests.
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 Bituminous Pavements Standard Practice written by and published by . This book was released on 1971-12 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
