This bulletin gives the results of tests on samples of ledge rock, crushed stone, gravel, blast-furnace or smelter slag, and natural or manufactured fine aggregate which were made by the Bureau of Public Roads to January 1, 1951. This bulletin supersedes Miscellaneous Publication No. 76 of the U. S. Department of Agriculture, The Results of Physical Tests of Road-Building Rock, and supplements the data in that bulletin. The geographical distribution of the more than 13,000 samples is shown in table 1. The results of tests on more than 9,700 samples of coarse aggregate are reported in table 10 (beginning on p. 12) and on over 3,400 samples of fine aggregate in table 11 (beginning on p. 170). In both tables, the test results are arranged in alphabetical order by State, county, and nearest town.
Alkali-silica reaction (ASR) is an expansive reaction between the alkalis in the cement and reactive silica in the aggregates. Arkansas is currently w...
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United States Department of Transportation
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