-
摘要: 应用马歇尔试验法对添加不同Sasobit剂量的普通AC-13C型沥青混合料进行了体积参数分析, 以Sasobit沥青混合料的空隙率达到普通沥青混合料的空隙率(4.5%) 为控制指标, 以Sasobit沥青混合料稳定度相对于普通沥青混合料稳定度提高幅度最大为辅助指标, 确定了Sasobit沥青混合料的最佳击实温度为130℃和最佳Sasobit剂量为3%。利用车辙试验、低温小梁试验、冻融劈裂试验和浸水马歇尔试验对加入3%Sasobit的沥青混合料以及同级配普通沥青混合料的性能进行了对比测试, 研究了Sasobit对沥青混合料路用性能的影响。分析结果表明: 相对于普通沥青混合料, Sasobit沥青混合料的击实温度虽然降低了20℃, 但高温稳定性却有明显提高, 动稳定度是普通沥青混合料的3倍; Sasobit沥青混合料的低温抗裂性与水稳定性低于普通沥青混合料, 但下降幅度不明显。
-
关键词:
- 路面材料 /
- Sasobit沥青混合料 /
- 最佳击实温度 /
- 最佳Sasobit剂量 /
- 路用性能
Abstract: The volume parameters of AC-13C asphalt mixtures with different Sasobit contents were analyzed by Marshall test method.The control index was that the porosity of Sasobit asphalt mixture was equal to the porosity of ordinary asphalt mixture (4.5%).The secondary index was that the improvement of dynamic stability for Sasobit asphalt mixture was maximum relative to ordinary asphalt mixture.The optimal compaction temperature and Sasobit content were determined according to the two indices, which were 130 ℃ and 3% respectively.The performances of different AC-13C asphalt mixtures with 3% Sasobit and without Sasobit were compared by rutting test, low-temperature bending-beam test, frost thawing and splitting test, immersion Marshall test respectively, and the influence of Sasobit was analyzed.Analysis result shows that compared with ordinary asphalt mixture, the compaction temperature of Sasobit asphalt mixture decreases by 20 ℃, but its high-temperature stability rises, and its dynamic stability increases by 3 times.Its low-temperature anti-crack ability and moisture stability are lower, but the diminutions are unconspicuous. -
表 1 Sasobit性能测试结果
Table 1. Test result of Sasobit performances
项目 熔点/℃ 闪点/℃ 135 ℃粘度/ (10-3Pa·s) 150 ℃粘度/ (10-3Pa·s) 25 ℃针入度/0.1 mm 60℃针入度/0.1 mm 测试值 100 290 5.47 3.26 1 8 表 2 沥青性能测试结果
Table 2. Test result of asphalt performances
项目 25 ℃针入度/0.1 mm 软化点/℃ 针入度指数 延度/cm 测试值 71 49.6 -0.83 > 144 表 3 AC-13C矿料级配
Table 3. Gradation of AC-13C
筛孔尺寸/mm 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 合成级配 100.0 98.7 77.8 43.6 36.5 25.8 17.3 10.5 7.6 5.6 表 4 空隙率测试结果
Table 4. Test result of porosity
Sasobit剂量/% 空隙率/% 150 ℃ 140 ℃ 130 ℃ 120 ℃ 110 ℃ 100 ℃ 0 4.5 4.7 5.4 5.8 5.9 6.3 2 4.2 4.5 5.2 5.5 5.8 6.1 3 3.8 4.3 4.5 4.8 5.4 6.0 4 3.4 3.7 4.3 5.1 5.3 5.9 5 3.2 3.5 4.0 5.0 5.3 5.8 表 5 矿料间隙率测试结果
Table 5. Test result of mineral aggregate void
Sasobit剂量/% 矿料间隙率/% 150 ℃ 140 ℃ 130 ℃ 120 ℃ 110 ℃ 100 ℃ 0 15.7 15.9 16.5 16.8 17.0 17.3 2 14.5 14.7 15.4 15.7 15.9 16.2 3 14.1 14.6 14.7 15.0 15.6 16.1 4 13.7 14.0 14.5 15.3 15.5 15.9 5 13.6 13.9 14.2 15.2 15.4 15.9 表 6 沥青饱和度测试结果
Table 6. Test result of asphalt saturation
Sasobit剂量/% 沥青饱和度/% 150 ℃ 140 ℃ 130 ℃ 120 ℃ 110 ℃ 100 ℃ 0 71.3 70.4 67.1 65.7 65.1 63.7 2 71.0 69.4 66.0 64.6 63.5 62.3 3 73.2 70.2 69.6 68.0 65.1 62.7 4 75.4 73.5 70.6 66.5 65.6 63.3 5 76.4 74.5 72.2 67.1 65.7 63.7 表 7 相对密度测试结果
Table 7. Test result of relative density
Sasobit剂量/% 毛体积相对密度/ (g·cm-3) 150 ℃ 140 ℃ 130 ℃ 120 ℃ 110 ℃ 100 ℃ 0 2.425 2.420 2.401 2.393 2.389 2.380 2 2.461 2.453 2.434 2.426 2.420 2.412 3 2.472 2.457 2.454 2.445 2.429 2.415 4 2.482 2.473 2.459 2.437 2.432 2.418 5 2.486 2.477 2.467 2.440 2.433 2.421 表 8 稳定度测试结果
Table 8. Test result of stability
Sasobit剂量/% 稳定度/kN 150 ℃ 140 ℃ 130 ℃ 120 ℃ 110 ℃ 100 ℃ 0 11.14 10.23 9.80 9.25 7.12 6.48 2 13.23 11.93 11.20 10.89 8.99 8.44 3 14.98 13.84 13.29 11.15 10.51 9.04 4 15.18 14.15 13.45 11.17 10.62 9.79 5 16.19 14.52 13.98 12.91 11.94 10.38 表 9 性能对比
Table 9. Comparison of performances
类型 稳定度/kN 动稳定度/ (次·mm-1) 破坏应变/με 残留稳定度/% 残留强度比/% 普通沥青混合料 11.14 1140 2 819 82.6 79.3 Sasobit沥青混合料 13.29 3277 2 554 80.7 78.4 规范值 ≥8.00 ≥1 000 ≥2 000 ≥80.0 ≥75.0 -
[1] 杨小娟, 李淑明, 史保华. 温拌沥青混合料的技术与应用分析[J]. 石油沥青, 2007, 21 (4): 58-61. https://www.cnki.com.cn/Article/CJFDTOTAL-OILE200704017.htmYANG Xiao-juan, LI Shu-ming, SHI Bao-hua. Technologyand applied analyzing of warm-mixed asphalt mixture[J]. Petroleum Asphalt, 2007, 21 (4): 58-61. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-OILE200704017.htm [2] 秦永春, 黄颂昌, 徐剑, 等. 温拌沥青混合料技术及最新研究[J]. 石油沥青, 2006, 20 (4): 18-21. https://www.cnki.com.cn/Article/CJFDTOTAL-OILE200604005.htmQI N Yong-chun, HUANG Song-chang, XU Jian, et al. Warm mix asphalt technologies and latest researches[J]. Petroleum Asphalt, 2006, 20 (4): 18-21. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-OILE200604005.htm [3] 李祝龙, 丁小军, 赵述曾, 等. 沥青混合料应用中的环境保护[J]. 交通运输工程学报, 2004, 4 (4): 1-4. http://transport.chd.edu.cn/article/id/200404001LI Zhu-long, DI NG Xiao-jun, ZHAO Shu-zeng, et al. Envi-ronment protection in application of asphalt mixture[J]. Journal of Traffic and Transportation Engineering, 2004, 4 (4): 1-4. (in Chinese) http://transport.chd.edu.cn/article/id/200404001 [4] HURLEY GC, PROWELL B D. Evaluation of Sasobit for useinwarm mix asphalt[R]. Auburn: Auburn University, 2005. [5] HURLEY G C, PROWELL B D. Evaluation of evothermfor usein warm mix asphalt[R]. Auburn: Auburn University, 2006. [6] JTJ 052—2000, 公路工程沥青及沥青混合料试验规程[S].JTJ 052—2000, standard test methods of bitumen and bitu-minous mixtures for highway engineering[S]. (in Chinese) [7] JTG F40—2004, 公路沥青路面施工技术规范[S].JTG F40—2004, technical specifications for construction ofhighway asphalt pavement[S]. (in Chinese) [8] 严世祥. 温拌沥青混合料的应用技术研究[D]. 重庆: 重庆大学, 2007.YAN Shi-xiang. Study on the technology of warm mixasphalt[D]. Chongqing: Chongqing University, 2007. (in Chinese) [9] 王随原, 严世祥, 周进川. 减粘剂对沥青及沥青混合料典型特性的影响[J]. 公路交通科技2008, 25 (4): 146-150.WANG Sui-yuan, YAN Shi-xiang, ZHOUJin-chuan. Effectof viscosity-reducer on typical properties of asphalt andasphalt mixture[J]. Journal of Highway and TransportationResearch and Development, 2008, 25 (4): 146-150. (in Chinese) [10] 李宁利, 李铁虎, 陈华鑫, 等. 改性沥青混合料的拌和与压实温度[J]. 中国公路学报, 2007, 20 (2): 40-44. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200702007.htmLI Ning-1i, LI Tie-hu, CHEN Hua-xin, et al. Mixing andcompaction temperatures of modified asphalt mixture[J]. China Journal of Highway and Transport, 2007, 20 (2): 40-44. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200702007.htm [11] BUTTONJ W, ESTAKHRI C, WI MSATT A. Asynthesisof warm-mix asphalt[R]. Texas: Texas TransportationInstitute, 2007. -