A manual for design of hot mix asphalt with commentary - download pdf or read online

By National Research Council (U.S.). Transportation Research Board.; National Cooperative Highway Research Program.; American Association of State Highway and Transportation Officials.; United States. Federal Highway Administration.; Advanced Asphalt Technol

ISBN-10: 0309155649

ISBN-13: 9780309155649

ISBN-10: 1621982343

ISBN-13: 9781621982340

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Engineers and technicians should keep in mind that if a PG binder is selected at a 50% reliability level, there is a 50-50 chance in any year that the high and/or low pavement temperature will exceed those for which the binder has been developed. That is, a pavement made using a binder selected at a 50% reliability level is likely to exhibit rutting and or low-temperature cracking within a few years. Therefore, high reliability levels should be used when selecting binders. For lightly traveled rural and residential roads, reliability levels of at least 90% should be used.

AASHTO Grading No. 075 mm 1 100 95 to 100 70 to 100 40 to 80 20 to 65 7 to 40 2 to 20 0 to 10 2 --- 100 75 to 100 50 to 74 28 to 52 8 to 30 0 to 12 0 to 5 3 --- 100 95 to 100 85 to 100 65 to 90 30 to 60 5 to 25 0 to 5 4 100 80 to 100 65 to 100 40 to 80 20 to 65 7 to 40 2 to 20 0 to 10 5 100 80 to 100 65 to 100 40 to 80 20 to 65 7 to 46 2 to 30 --- % Passing (mass %) for Sieve Size: Aggregates Table 4-5. Typical density values for various materials, including common construction aggregates. 50 Aggregate specific gravity is determined using different techniques for coarse and fine aggregate.

In performing a sieve analysis, there are several important considerations: • The weight of the test sample must be large enough to produce reliable test results. Larger aggregate sizes will require larger sample sizes. Table 4-1 lists minimum weights for test samples for sieve analysis for different NMAS values. • The sieve opening sizes selected should be appropriate for the aggregate being tested. Past data or the gradation specification for the aggregate being tested can be used to determine the sieves needed for a given aggregate.

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A manual for design of hot mix asphalt with commentary by National Research Council (U.S.). Transportation Research Board.; National Cooperative Highway Research Program.; American Association of State Highway and Transportation Officials.; United States. Federal Highway Administration.; Advanced Asphalt Technol


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