A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Realistic Job-Mix Formula Tolerances for Asphalt Concrete. Phase I. Bituminous Pavement Study
The New State Department of Public Works initiated a study to determine the uniformity of asphalt concrete top course mix. Research crews visited 55 asphalt concrete plants and obtained 868 hot bin samples and 682 mix samples between the years 1961 and 1964. Data was processed and analyzed by electronic computer. The outcome of the study was as follows: Job mix formula tolerances were developed and incorporated in New York State Department of Public Works Specifications. The tolerances are set at approximately two standard deviations as computed by pooling state-wide test results. Variability due to sampling and testing, as well as the inherent variability in the material itself, are included in the tolerances. A quality control procedure was developed using statistical data accumulated during this study. It is based on sequential sampling of hot bins and has proven effective. A significant difference existed between the results of dry sieved hot bin analyses and extraction tests on all sieve sizes below the one-half inch. The hot bin test was more uniform in the coarse sizes, while the extraction test showed greater uniformity in the finer sizes. (Author)
Realistic Job-Mix Formula Tolerances for Asphalt Concrete. Phase I. Bituminous Pavement Study
The New State Department of Public Works initiated a study to determine the uniformity of asphalt concrete top course mix. Research crews visited 55 asphalt concrete plants and obtained 868 hot bin samples and 682 mix samples between the years 1961 and 1964. Data was processed and analyzed by electronic computer. The outcome of the study was as follows: Job mix formula tolerances were developed and incorporated in New York State Department of Public Works Specifications. The tolerances are set at approximately two standard deviations as computed by pooling state-wide test results. Variability due to sampling and testing, as well as the inherent variability in the material itself, are included in the tolerances. A quality control procedure was developed using statistical data accumulated during this study. It is based on sequential sampling of hot bins and has proven effective. A significant difference existed between the results of dry sieved hot bin analyses and extraction tests on all sieve sizes below the one-half inch. The hot bin test was more uniform in the coarse sizes, while the extraction test showed greater uniformity in the finer sizes. (Author)
Realistic Job-Mix Formula Tolerances for Asphalt Concrete. Phase I. Bituminous Pavement Study
M. D. Graham (author) / W. C. Burnett (author) / J. J. Thomas (author) / C. R. Fletcher (author)
1966
68 pages
Report
No indication
English
Realistic job-mix formula tolerances for asphalt-concrete
| Engineering Index Backfile | 1967
Specifications for bituminous concrete pavement
Engineering Index Backfile | 1910
Bituminous concrete pavement construction methods
| Engineering Index Backfile | 1938
Bituminous concrete pavement construction methods
| Engineering Index Backfile | 1938