Design method of asphalt mixture aggregate gradation based on high-temperature performance
-
摘要: 为设计嵌挤、密实、稳定的矿料级配, 利用粗集料堆积密度试验分析了容器容积和撒铺方式对集料密度测试结果的影响, 建立了基于MTS的粗集料贯入试验方法, 对不同混合料进行了汉堡车辙试验, 并提出利用贯入试验确定粗集料级配, 利用贝雷法合成粗细集料的混合料级配。试验结果表明: 受到容器容积、集料洒落方式等的影响, 国内外粗集料松装密度测试数据间存在6%的差距; 按贝雷法设计的混合料无法保证其高温稳定性能; 贯入试验可有效区分粗集料稳定性, 同时与混合料车辙深度的线性相关系数达到0.71。可见, 混合料级配设计方法可有效确保混合料高温性能。Abstract: In order to gain the aggregate gradation with extrusion, density and stabilization, the density test of coarse aggregate was used to research the influences of vessel volume and spreading mode on aggregate density, penetration test was established based on MTS, and Hamburg wheel rutting test was taken for different mixtures. The gradation of coarse aggregate was confirmed by penetration test, and the aggregate gradations of asphalt mixtures were combined by Bailey method. Test result shows that because of the difference of vessel volumes and falling modes of aggregate, the home and abroad test difference of loose densities of aggregate is 6%. The good high-temperature performance of the mixture designed with Bailey method can not be assured. Penetration test can distinguish the stability of coarse aggregate effectively, and the correlation coefficient with the rutting depth of mixture is 0.71. So the high-temperature performance of mixture can be kept well by using the method.
-
Key words:
- road material /
- asphalt mixture /
- gradation design /
- penetration test /
- Bailey method /
- Hamburg wheel rutting test
-
表 1 容量桶规格
Table 1. Vessel specifications
粗集料公称最大粒径/mm 容量桶容积/L 容量桶规格/mm 筒壁厚度/mm 内径 净高 底厚 ≤4.75 3 155±2 160±2 5.0 2.5 9.5~26.5 10 205±2 305±2 5.0 2.5 31.5~37.5 15 255±2 295±2 5.0 3.0 ≥53 20 355±2 305±2 5.0 3.0 
下载: 导出CSV
表 2 集料堆积密度适宜容器容积
Table 2. Suitable volumes of vessels for packing densities of aggregates
粒径/mm 2.36 4.75 9.5 13.2 16 19 26.5 31 37.5 松装密度适宜容器容积/L 5 5 10 10 10 10 10 15 20 插捣密度适宜容器容积/L 5 5 5 5 10 10 10 10 15
下载: 导出CSV
表 3 容器建议容积
Table 3. Suggested volumes of vessels
公称最大粒径/mm 容器容积/L 容器规格/mm 壁厚/mm 内径 净高 底厚 2.36~9.5 5 175±2 200±2 5 2.5 9.5~26.5 10 205±2 305±2 5 2.5 ≥26.5 20 355±2 305±2 5 3.0
下载: 导出CSV
表 4 粗集料堆积密度
Table 4. Packing densities of coarse aggregates
集料粒径/mm 集中洒落时下落高度/mm 松装密度/ (g·cm-3) 50 mm高度时不同撒铺方式 松装密度/ (g·cm-3) 13.2 50 1.49 均匀 1.54 115 1.51 集中 1.49 4.75 50 1.44 均匀 1.52 115 1.47 集中 1.43
下载: 导出CSV
表 5 集料级配
Table 5. Gradations of aggregates
% 集料类型 筛孔尺寸/mm 19 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 0 CA-1 100.0 99.4 81.5 20.4 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 CA-2 100.0 100.0 100.0 99.8 23.2 2.0 0.7 0.0 0.0 0.0 0.0 0.0 FA 100.0 100.0 100.0 100.0 99.7 69.7 47.6 31.0 16.4 10.0 0.0 0.0
下载: 导出CSV
表 6 粗集料试验级配与体积指标
Table 6. Test gradations and volume indexes of coarse aggregates
% 级配类型 2 3 4 5 6 S Z CA-1质量分数 85 70 55 40 25 34 53 CA-2质量分数 15 30 45 60 75 66 47 松装空隙率 39.31 41.05 40.39 41.71 42.31 40.95 40.93 插捣空隙率 36.49 37.43 37.42 38.20 39.16 37.60 37.52
下载: 导出CSV
表 7 混合料级配
Table 7. Gradations of asphalt mixtures
% 筛孔尺寸/mm 混合料级配 2 3 4 5 6 S Z 16 99.67 99.73 99.79 99.85 99.90 99.87 99.84 13.2 90.32 92.02 93.74 95.46 97.20 96.30 95.19 9.5 58.38 65.67 73.01 80.41 87.85 84.01 79.26 4.75 39.13 40.17 41.21 42.26 43.31 49.99 56.27 2.36 27.50 26.72 25.94 25.15 24.36 31.17 37.82 1.18 20.62 20.02 19.41 18.80 18.18 22.94 27.60 0.6 15.45 15.01 14.57 14.13 13.69 16.84 19.94 0.3 10.99 10.76 10.53 10.29 10.06 11.72 13.36 0.15 9.04 8.90 8.76 8.61 8.47 9.48 10.48 0.075 6.00 6.00 6.00 6.00 6.00 6.00 6.00
下载: 导出CSV
表 8 沥青混合料最佳油石比与车辙试验结果
Table 8. Optimal asphalt contents and rutting test results of mixtures
混合料类型 2 3 4 5 6 S Z 最佳油石比/% 4.24 4.56 4.92 5.36 5.79 4.83 3.63 车辙/mm 2.17 2.96 5.13 2.96 7.67 7.20 7.50
下载: 导出CSV
表 9 粗集料贯入荷载
Table 9. Penetration loads of coarse aggregates
级配类型 2 3 4 5 6 S Z 贯入荷载/kN 15.7 13.7 15.1 14.7 10.6 12.8 12.1
下载: 导出CSV
-
[1] 黄卫东, 游宏, 钟顺福. 基于矿料间隙率的SMA混合料设计新法[J]. 同济大学学报: 自然科学版, 2009, 37 (4): 500-504. https://www.cnki.com.cn/Article/CJFDTOTAL-TJDZ200904019.htmHUANG Wei-dong, YOU Hong, ZHONG Shun-fu. ModifiedSMAdesign procedure based on voids in mineral aggregate[J]. Journal of Tongji University: Natural Science, 2009, 37 (4): 500-504. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TJDZ200904019.htm [2] 李晓军, 冯樊. 非均匀性的沥青混凝土半圆弯曲试验数值仿真[J]. 长安大学学报: 自然科学版, 2010, 30 (4): 18-22. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL201004006.htmLI Xiao-jun, FENG Fan. A microstructure-based numericalsi mulation of semi-circular bending test of asphalt concrete[J]. Journal of Chang an University: Natural Science Edition, 2010, 30 (4): 18-22. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL201004006.htm [3] 沙爱民, 周庆华, 杨琴. 高模量沥青混凝土材料组成设计方法[J]. 长安大学学报: 自然科学版, 2009, 29 (3): 1-5. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200903000.htmSHA Ai-min, ZHOU Qing-hua, YANG Qin. Material com-position design methodfor high modulus asphalt concrete[J]. Journal of Chang an University: Natural Science Edition, 2009, 29 (3): 1-5. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200903000.htm [4] 贾锦绣, 韩森, 徐鸥明. 沥青稳定碎石混合料的抗剪性能[J]. 长安大学学报: 自然科学版, 2009, 29 (3): 23-26. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200903005.htmJI A Jin-xiu, HAN Sen, XU Ou-ming. Anti-shearing per-formance of asphalt treated base mixtures[J]. Journal ofChang an University: Natural Science Edition, 2009, 29 (3): 23-26. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200903005.htm [5] 谭忆秋, 石昆磊, 朱峰, 等. 级配对应力吸收层沥青混合料性能的影响[J]. 长安大学学报: 自然科学版, 2009, 29 (2): 33-36. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200902011.htmTAN Yi-qiu, SHI Kun-lei, ZHU Feng, et al. Impact of asphaltmixture gradation on stress-absorbing layer performance[J]. Journal of Chang an University: Natural Science Edition, 2009, 29 (2): 33-36. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200902011.htm [6] 王富玉, 沙庆林, 戴文亭, 等. VCAAC级配检验方法在施工中的应用[J]. 长安大学学报: 自然科学版, 2008, 28 (5): 39-44. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200805011.htmWANG Fu-yu, SHA Qing-lin, DAI Wen-ting, et al. Applicationof aggregate gradation test method of VCAACin highwayconstruction[J]. Journal of Chang an University: NaturalScience Edition, 2008, 28 (5): 39-44. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200805011.htm [7] 赵战利, 张争奇, 薛建设, 等. 基于分形理论的沥青混合料抗滑级配评价[J]. 长安大学学报: 自然科学版, 2008, 28 (3): 6-10. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200803002.htmZHAO Zhan-li, ZHANG Zheng-qi, XUE Jian-she, et al. Evaluation of skid resistance gradations of asphalt mixture basedon fractal theory[J]. Journal of Chang an University: NaturalScience Edition, 2008, 28 (3): 6-10. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200803002.htm [8] 付其林, 陈拴发, 陈华鑫. 开级配大粒径沥青碎石混合料的高温稳定性[J]. 长安大学学报: 自然科学版, 2010, 30 (2): 20-23. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL201002006.htmFU Qi-lin, CHENShuan-fa, CHEN Hua-xin. Hightempera-ture stability of open-graded large stone asphalt mixes[J]. Journal of Chang an University: Natural Science Edition, 2010, 30 (2): 20-23. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL201002006.htm [9] 冯新军, 郝培文. 密级配沥青稳定碎石基层混合料级配设计方法[J]. 中国公路学报, 2009, 22 (4): 33-38. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200904007.htmFENG Xin-jun, HAO Pei-wen. Gradation design method ofdense-graded asphalt stabilized macadam base[J]. ChinaJournal of Highway and Transport, 2009, 22 (4): 33-38. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200904007.htm [10] 吴旷怀, 张肖宁. 沥青混合料设计的主骨料空隙体积填充法研究及应用[J]. 中南公路工程, 2004, 29 (2): 58-64. https://www.cnki.com.cn/Article/CJFDTOTAL-ZNGL200402015.htmWU Kuang-huai, ZHANG Xiao-ning. Coarse aggregate void-filling method for asphalt mixture design[J]. Central SouthHighway Engineering, 2004, 29 (2): 58-64. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZNGL200402015.htm [11] 王立久, 刘慧. 骨架密实型沥青混合料集料级配设计方法[J]. 中国公路学报, 2008, 21 (5): 6-9. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200805003.htmWANG Li-jiu, LI U Hui. Method of aggregate gradationdesign of skeleton denseness asphalt mixture[J]. China Journalof Highway and Transport, 2008, 21 (5): 6-9. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200805003.htm [12] 申康, 陈爱文, 吕文江, 等. 贝雷法设计密度对沥青混合料性能的影响[J]. 长安大学学报: 自然科学版, 2008, 28 (3): 16-20. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200803004.htmSHEN Kang, CHEN Ai-wen, LU Wen-jiang, et al. Influ-ence of Bailey s chosen unit weight on performance of asphaltmixture[J]. Journal of Chang an University: Natural ScienceEdition, 2008, 28 (3): 16-20. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200803004.htm [13] 郝培文, 徐金枝, 周怀治. 应用贝雷法进行级配组成设计的关键技术[J]. 长安大学学报: 自然科学版, 2004, 24 (6): 1-6.HAO Pei-wen, XUJin-zhi, ZHOU Huai-zhi. Key technolo-gies of aggregate blending by Bailey method[J]. Journal ofChang an University: Natural Science Edition, 2004, 24 (6): 1-6. (in Chinese) [14] JTG E42—2005, 公路工程集料试验规程[S].JTG E42—2005, test method of aggregate for highway engin-eering[S]. [15] AASHTO T326—2005, standard method of test for uncom-pacted void content of coarse aggregate (as influence by parti-cle shape, surface texture, and grading)[S]. [16] 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 pavements[S]. (in Chinese) -
点击查看大图
图(7) / 表(9)
计量
- 文章访问数: 811
- HTML全文浏览量: 87
- PDF下载量: 546
- 被引次数: 0
