Warm-mixed auxiliary agent for asphalt mixture and preparation method thereof
A warm-mix asphalt and mixture technology, applied in the field of material science and engineering, can solve problems such as unstable road performance, achieve the effects of reducing exhaust gas emissions and saving energy
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[0031] Example 1:
[0032] The Superpave gradation design method is adopted for the gradation design. Take Superpave12.5 as an example. The rotary compactor is used for molding. The molding pressure of the rotary compactor is 600KPa, and the design rotation number is N-Initial=9, N-Design=125 And N-Max = 205 (the amount of warm-mix asphalt mixture additives added is 0.4% of the total mass of the asphalt mixture):
[0033] 1. Asphalt: SBS modified asphalt provided by Hubei Ezhou Keshi Asphalt Material Co., Ltd. is adopted, and its quality requirements meet the "Technical Specification for Highway Asphalt Pavement Construction" (JTG F40-2004).
[0034] 2. Warm-mix asphalt mixture additives:
[0035] The warm-mix asphalt additive is composed of synthetic zeolite and sodium sulfate decahydrate in a ratio of 96:4. The water release of the mixture when dried at 125℃ for 2h is 13.6%, and the water released by continuous drying at 200℃ for 2h is 21.5% .
[0036] The technical indicators of ...
Example Embodiment
[0045] Example 2:
[0046] Take dense-graded asphalt concrete mixture AC-13 as an example (the amount of additives for warm-mix asphalt mixture is 0.5% of the total mass of the asphalt mixture):
[0047] 1. Asphalt: use No. 90 road petroleum asphalt provided by Liaoning Panjin North Asphalt Co., Ltd., and its quality requirements conform to the "Technical Specification for Highway Asphalt Pavement Construction" (JTG F40-2004).
[0048] 2. Warm-mix asphalt mixture additives:
[0049] The warm-mix asphalt additive is composed of synthetic zeolite and sodium sulfate decahydrate, the mass ratio of which is 95:5. The water release of the mixture after drying at 125℃ for 2h is 13.8%, and the release of water after continuous drying at 200℃ for 2h is 19.7 %.
[0050] The technical indicators of synthetic zeolite are: yellow-white powder, SiO 2 The content is 30.6%, Al 2 O 3 The content is 29.2%, Na 2 The content of O was 16.1%, the amount of crystal water released by drying at 125°C for ...
Example Embodiment
[0057] Example 3:
[0058] Take the graded asphalt concrete mixture AC-20 as an example (the additive amount of the warm-mix asphalt mixture is 0.3% of the total mass of the asphalt mixture):
[0059] 1. Asphalt: use No. 70 road petroleum asphalt provided by Hubei Ezhou Keshi Asphalt Material Co., Ltd., and its quality requirements meet the "Technical Specification for Highway Asphalt Pavement Construction" (JTG F40-2004).
[0060] 2. Warm-mix asphalt mixture additives:
[0061] The warm-mix asphalt additive is composed of synthetic zeolite and sodium sulfate decahydrate, the mass ratio of which is 94:6, the water release of the mixture when dried at 125℃ for 2h is 13.0%, and the water released by continuous drying at 200℃ for 2h is 18.7 %.
[0062] The technical indicators of synthetic zeolite are: yellow-white powder, SiO 2 The content is 26.28%, Al 2 O 3 The content is 28.32%, Na 2 The content of O is 17.36%, the amount of crystal water released after drying at 125°C for 2h is ...
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