Waste asphalt concrete gradating optimization method based on grey system theory
A grey system theory and asphalt concrete technology, applied in the field of materials, can solve the problems of inability to stably control the gradation composition of mixtures, lack of RAP particle quantification regularity conclusions, and difficulty in controlling the gradation laws.
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[0041] The following is a further detailed description of the waste asphalt concrete grading optimization method based on the gray system theory in combination with specific data.
[0042] (1) Classified pretreatment of waste asphalt concrete
[0043] The waste asphalt concrete is divided into 4 grades according to particle size, RAP-1 (>13.2mm), RAP-2 (9.5-13.2mm), RAP-3 (4.75-9.5mm), RAP-4 (<4.75mm). The waste asphalt concrete at all levels is directly screened, and the screening results are recorded, as shown in Table 2. Remove all levels of RAP surface asphalt, sieve the various levels of RAP particles after the asphalt removal, and record the screening results, as shown in Table 3, the described removal of all levels of RAP surface asphalt is realized by a combustion method asphalt content tester;
[0044] Table 2 Direct screening results
[0045]
[0046] Table 3 Screening results after asphalt removal
[0047]
[0048]
[0049] (2) Calculation of virtual gra...
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