Design method of high-performance ultrathin asphalt wearing layer
A design method and high-performance technology, applied in computer-aided design, design optimization/simulation, calculation, etc., to achieve good economic effect, excellent road performance, and durability against water damage
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Embodiment 1
[0060] To design a HPUT-10 wear layer for general roads, with a thickness of 2cm, the main steps are as follows, and the flow chart is as follows figure 2 Shown:
[0061] S1: Raw material performance testing
[0062] The asphalt mix design uses high-viscosity and high-elasticity modified asphalt, and its technical indicators are shown in Table 4, which meets the technical requirements of Class I-D and PG76-28 stipulated in the "Technical Specifications for Construction of Highway Asphalt Pavement" (JTG F40-2004).
[0063] Table 4 Test results of high-viscosity and high-elasticity modified asphalt
[0064]
[0065]
[0066] The asphalt mix design uses coarse aggregate particle size specifications of 5-10mm and 3-5mm respectively; fine aggregate is 0-3mm stone chips, and the aggregate test is strictly in accordance with the "Highway Engineering Aggregate Test Regulations" (JTG E42-2005 ) requirements and methods for testing, see Table 5 for aggregate density and Table 6...
Embodiment 2
[0110] To design a HPUT-10 wearing layer for tunnel pavement and bridge deck pavement, with a thickness of 2cm, the main steps are as follows:
[0111] S1: Raw material performance testing
[0112] The asphalt is mainly Shell SBS (I-D) modified asphalt, and the test results are shown in Table 12.
[0113] Table 12 Test results of SBS(I-D) modified asphalt
[0114]
[0115] Coarse aggregate and fine aggregate are both made of diabase; mineral powder is limestone; anti-stripping agent uses 1.5% P.O.42.5 cement to improve the adhesion between asphalt and aggregate; flocculent wood fiber and flame retardant are added. The aggregate test results are shown in Table 13.
[0116] Table 13 aggregate test results
[0117]
[0118] S2: Select the initial grading
[0119] Select a grading curve this time. If a certain technical index does not meet the requirements during the design process, return to this step for corresponding adjustments. See Table 14 for aggregate screening res...
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