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Edition:Final report.
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Abstract:The study investigated the feasibility of eliminating aggregate particulates passing the #200 and #100 sieves from a surface mix (S-5) gradation. Feasibility was to be determined on the basis of test mixtures, with particulates deleted, meeting Virginia's specifications. Two aggregates, greenstone and granite, were used to prepare Marshall specimens for lab tests. For both aggregate types the original S-5 gradation was tested and used as a control. Four variations of this gradation were designed and tested for each aggregate type. These variations excluded portions of the fine particulates to the point of no aggregate passing the #100 sieve. Test results for each gradation of the two aggregates were compared graphically. A range of acceptable asphalt percentages was calculated for each of the five gradations.
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