-
摘要: 为了研究纤维掺量对沥青混凝土变形性能的影响, 选用纤维掺量分别为沥青混凝土总质量的0、0.15%、0.20%、0.25%、0.30%的马歇尔试件, 在MTS810材料试验机上进行劈裂试验, 试验温度为15℃, 分析了劈裂试验结果随纤维掺量变化的规律, 应用无量纲的韧性指数和劈裂强度评价纤维沥青混凝土的变形性能。研究结果发现, 纤维的加入没有显著增大沥青混凝土的劈裂强度, 但其韧性得到明显的改善, 反映出材料的抗变形能力得以增强, 韧性指数能够作为评价纤维沥青混凝土变形性能的指标, 根据劈裂强度给出聚酯纤维改善沥青混凝土变形性能的合理掺量约为0.20%。Abstract: In order to study the deformation of polyester fiber asphalt concrete with different fiber contents by splitting test, Marshall samples of asphalt mixture, with fiber quality contents of 0, 0.15%, 0.20%, 0.25% and 0.30%, were tested by MTS810 at (15 ℃, ) a non-dimensional toughness index was induced in order to evaluate the deformation performance of polyester fiber asphalt concrete.It is found that polyester fiber doesn't evidently change the splitting strength, but it significantly enhances the toughness and deformation resistance of asphalt concrete, the proposed toughness index can properly evaluate the deformation resistance of polyester fiber asphalt concrete, and the optimum fiber content is about 0.20% according to the toughness index and the splitting strength.
-
Key words:
- pavement engineering /
- fiber asphalt concrete /
- splitting test /
- toughness
-
表 1 沥青性能指标
Table 1. Technical parameters of asphalt
软化点/℃ 针入度(25℃) /0.1mm 延度(15℃) /cm 含蜡量/% 闪点/℃ 溶解度/% 沥青薄膜加热试验(163℃, 5h) 密度(25℃) / (g·cm-3) 质量损失/% 针入度比/% 延度(15℃) /cm 45.5 86 > 100 1.93 251 99.7 0.16 62.1 42.7 1.008 
下载: 导出CSV
表 2 集料性能指标
Table 2. Properties of test aggregates
材料 压碎值/% 磨耗值/% 吸水率/% 含泥量/% 亲水系数 表观相对密度/ (g·cm-3) 针片状含量/% 塑性指数/% 粗集料 13.8 12.6 — — — 2.772 10.7 — 石屑 — — 0.75 — — 2.706 — — 砂子 — — 1.26 2 0.9 2.651 — — 矿粉 — — — — — 2.724 — 2.6
下载: 导出CSV
表 3 聚酯纤维物化性能参数
Table 3. Physical and chemical parameters of test polyester fiber
纤维类型 纤维直径/mm 拉伸强度/MPa 断裂伸长率/% 纤维长度/mm 密度/ (g·cm-3) 熔点/℃ 弹性模量/MPa 燃点温度/℃ 卷曲性 耐酸、碱性能 单丝 0.015±0.005 1 165 38 6±1 1.36~1.38 260 9 536 > 560 无 强
下载: 导出CSV
表 4 马歇尔试验结果
Table 4. Result of Marshall test
纤维掺量/% 最佳沥青用量/% 毛体积密度/ (g·cm-3) 空隙率/% 稳定度/kN 流值/0.1mm 0 5.20 2.458 4.30 8.48 25.4 0.15 5.31 2.432 4.47 8.79 26.6 0.20 5.35 2.423 4.62 9.03 27.3 0.25 5.41 2.388 4.71 8.32 28.7 0.30 5.45 2.381 4.83 8.07 30.4
下载: 导出CSV
表 5 劈裂试验结果
Table 5. Result of splitting test
纤维掺量/% 破坏荷载/kN 劈裂强度/MPa 劲度模量/MPa 破坏应变 0 9.68 0.958 161.45 0.011 1 0.15 10.04 0.994 202.99 0.009 2 0.20 10.24 1.014 250.24 0.007 6 0.25 9.24 0.915 176.05 0.009 7 0.30 8.50 0.842 166.47 0.009 5
下载: 导出CSV
-
[1] 倪富健, 郭咏梅, 曾兰英, 等. 聚丙烯腈纤维SMA路用性[J]. 交通运输工程学报, 2003, 3(3): 7-14. http://transport.chd.edu.cn/article/id/200303022Ni Fu-jian, Guo Yong-mei, Zeng Lan-ying, et al. Road performance of SMA mixture with PAN fiber composite[J]. Journal of Traffic and Transportation Engineering, 2003, 3(3): 7-14. (in Chinese) http://transport.chd.edu.cn/article/id/200303022 [2] 张争奇, 胡长顺. 纤维加强沥青混凝土几个问题的研究和探讨[J]. 西安公路交通大学学报, 2001, 21(1): 29-32. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200101007.htmZhang Zheng-qi, Hu Chang-shun. A study on fiber-enhanced asphalt concrete[J]. Journal of Xi'an Highway University, 2001, 21(1): 29-32. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200101007.htm [3] 彭波, 靳明, 袁万杰. 纤维增强沥青混合料性能的研究[J]. 重庆交通学院学报, 2002, 21(4): 27-30. https://www.cnki.com.cn/Article/CJFDTOTAL-CQJT200204007.htmPeng Bo, Jin Ming, Yuan Wan-jie. Study on performance of fiber-enhanced bituminous mixtures[J]. Journal of Chongqing Jiaotong University, 2002, 21(4): 27-30. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-CQJT200204007.htm [4] 陈华鑫, 胡长顺, 张争奇. 纤维沥青混合料的低温抗裂性能[J]. 华南理工大学学报: 自然科学版, 2004, 32(4): 82-86. doi: 10.3321/j.issn:1000-565X.2004.04.019Chen Hua-xin, Hu Chang-shun, Zhang Zheng-qi. Low temperature anti-cracking performance of fiber reinforced asphalt mixture[J]. Journal of South China University of Technology: Natural Science Edition, 2004, 32(4): 82-86. (in Chinese) doi: 10.3321/j.issn:1000-565X.2004.04.019 [5] JTJ 052-2000, 公路工程沥青及沥青混合料试验规程[S]. [6] 陈华鑫, 李宁利, 胡长顺, 等. 纤维沥青混合料路用性能[J]. 长安大学学报: 自然科学版, 2004, 24(2): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL201905004.htmChen Hua-xin, Li Ning-li, Hu Chang-shun, et al. Mechanical performance of fibers-reinforced asphalt mixture[J]. Journal of Chang'an University: Natural Science Edition, 2004, 24(2): 1-6. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL201905004.htm [7] Sobban K, Mashnad M. Mechanical stabilization of cemented soil-fly ash mixtures with recycled plastic strips[J]. Journal of Environmental Engineering, 2003, 129(10): 943-947. [8] Sobhan K, Mashnad M. Tensile strength and toughness of soil-cement-fly-ash composite reinforced with recycled highdensity polyethylene strips[J]. Journal of Materials in Civil Engineering, 2002, 14(2): 177-184. [9] 倪富健, 尹应梅. 聚酯玻纤布复合沥青混合料疲劳性能[J]. 交通运输工程学报, 2005, 5(3): 31-35. http://transport.chd.edu.cn/article/id/200503007Ni Fu-jian, Yin Ying-mei. Fatigue properties of asphalt mixture with fiberglass polyester mat[J]. Journal of Traffic and Transportation Engineering, 2005, 5(3): 31-35. (in Chinese) http://transport.chd.edu.cn/article/id/200503007 [10] 曾凡奇, 黄晓明, 李海军. 沥青性能的DSC评价方法[J]. 交通运输工程学报, 2005, 5(4): 37-42. http://transport.chd.edu.cn/article/id/200504008Zeng Fan-qi, Huang Xiao-ming, Li Hai-jun. Evaluation method of differential scanning calorimetry for asphalt performance[J]. Journal of Traffic and Transportation Engineering, 2005, 5(4): 37-42. (in Chinese) http://transport.chd.edu.cn/article/id/200504008 -
点击查看大图
图(3) / 表(5)
计量
- 文章访问数: 341
- HTML全文浏览量: 131
- PDF下载量: 470
- 被引次数: 0
