Preparation of LDHs-CRMA composite modified asphalt by response surface methodology and its characterization

被引：0
作者：
Lu Y. [1 ]
Yu L. [2 ]
Yang J. [1 ]
Zeng W. [1 ]
Lu J. [1 ]
机构：
[1] Key Laboratory of Oil & Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi, 830046, Xinjiang
[2] Bei-xin Si-fang Engineering Testing and Consulting Co. Ltd., Urumqi, 830018, Xinjiang
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 03期
关键词：
Anti-UV aging; Mathematical modeling; Modified asphalt; Optimization; Preparation; Response surface methodology;
D O I：
10.11949/0438-1157.20190856
中图分类号：
学科分类号：
摘要：
Mg-Al layer double hydroxides (Mg-Al LDHs) modified asphalt was prepared by melt blending with Karamay asphalt and waste crumb rubber (CR), which has UV aging resistance. The physical properties including softening point, penetration index (PI), ductility were tested, and the three indicators were "normalized"into overall desirability by Hassans mathematical method. The Box-Behnken mathematical relation model between overall desirability and affecting factors was established, and the technology of preparing composing LDHs/CRMA was optimized. The optimum preparation conditions were: shear temperature 173, shear time 89 min, and shear rate 3500 r/min. The aging resistance of composite modified asphalt was evaluated by UV aging simulation test. The FT-IR and SEM revealed that the introduction of LDHs can reduce the production of oxygen-containing functional groups during asphalt aging, and the anti-UV aging performance was improved. © All Right Reserved.
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页码：1362 / 1369
页数：7
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共 36 条
  • [1] Apeagyei A.K., Laboratory evaluation of antioxidants for asphalt binders, Construction & Building Materials, 25, 1, pp. 47-53, (2011)
  • [2] Petersen J.C., Chapter 14 chemical composition of asphalt as related to asphalt durability, Developments in Petroleum Science, 40, 9, pp. 363-399, (1984)
  • [3] Lu X., Isacsson U., Effect of ageing on bitumen chemistry and rheology, Construction & Building Materials, 16, 1, pp. 15-22, (2002)
  • [4] Fang C.Q., Yu R.E., Liu S.L.S., Et al., Nanomaterials applied in asphalt modification: a review, Journal of Materials Science & Technology, 29, 7, pp. 589-594, (2013)
  • [5] Zhang H.L., Yu J.Y., Kuang D.L., Effect of expanded vermiculite on aging properties of bitumen, Construction & Building Materials, 26, 1, pp. 244-248, (2012)
  • [6] Ouyang C.F., Wang S.F., Zhang Y., Et al., Improving the aging resistance of styrene-butadiene-styrene tri-block copolymer modified asphalt by addition of antioxidants, Polymer Degradation & Stability, 91, 4, pp. 795-804, (2006)
  • [7] Wu S.P., Han J., Pang L., Et al., Rheological properties for aged bitumen containing ultraviolate light resistant materials, Construction & Building Materials, 33, 7, pp. 133-138, (2012)
  • [8] Kang Y., Preparation and characterization of high performance epoxy modified asphalt materials, (2006)
  • [9] Xie Y.G., Yao H.R., Huang J., Structure and properties of POE elastomer modified asphalt, Elastomer, 23, 3, pp. 29-34, (2013)
  • [10] Song X., Yu J.Y., Wu W.F., Et al., Synthesis and characterization of layered double hydroxides intercalated by UV absorbents and their application in improving UV aging resistance of bitumen, Applied Clay Science, 114, pp. 112-129, (2015)
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