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《材料导报》期刊社  2018, Vol. 32 Issue (2): 295-300    https://doi.org/10.11896/j.issn.1005-023X.2018.02.027
  物理   材料研究 ｜材料 |
复掺钢丝绒纤维/水镁石纤维沥青胶浆性能研究
刘子铭1,陈华鑫1,熊锐1,王泳丹2,王小雯1
1 长安大学材料科学与工程学院,西安 710061
2 长安大学公路学院,西安 710064
Experimental Investigation on Properties of Steel Wool Fiber/Brucite Fiber Reinforced Asphalt Mortar
Ziming LIU1,Huaxin CHEN1,Rui XIONG1,Yongdan WANG2,Xiaowen WANG1
1 School of Materials Science and Engineering, Chang’an University, Xi’an 710061;
2 School of Highway, Chang’an University, Xi’an 710064;
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摘要 

通过改变纤维总掺量和两种纤维的体积比,采用延度试验、锥入度试验、布氏旋转粘度试验和动态剪切流变试验研究了混杂纤维沥青胶浆的低温延展性能、抗剪切性能、粘度特性及高温流变特性,同时借助扫描电镜(SEM)对其试样断面进行观察分析。结果表明:沥青胶浆的低温延展性随纤维掺量的增大而降低;在6%纤维总掺量范围内,随着纤维掺量的增大粘度逐渐增大,且增大的幅度减小;当钢丝绒纤维与水镁石纤维体积比为6/4时,沥青胶浆的车辙因子(G */sinδ)、抗剪强度达到最佳值;将两种纤维混杂掺入沥青胶浆中,充分分散,其与沥青粘结良好,发挥了增粘和桥接作用,提高了沥青胶浆的整体稳定性和抵抗永久变形的能力。

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刘子铭
陈华鑫
熊锐
王泳丹
王小雯
关键词:  道路工程  钢丝绒纤维  水镁石纤维  沥青胶浆    
Abstract: 

In order to investigate how fibers affect asphalt binder in low-temperature ductility, shear resistance, apparent viscosity and high-temperature rheology, ductility test, cone penetration test, Brookfield viscosity test and dynamic shear rheology test were applied and total adding mass and volume ratio of two type of fibers were considered. And cross sections morphology of samples were observed by scanning electronic microscope. Results showed that increasing addition of fibers could reduced low-temperature ductility. Viscosity was improved by increasing fiber addition but improvement seemed slower when adding proportion was close to 6%; while shear resistance and rut factor (G */sinδ) performed better when volume ratio of steel wool and brucite fiber was 6/4.Therefore,rutting resistance can be improved by viscosity growth and bridging induced by well dispersion and interaction between binder and fibers.

Key words:  road engineering    steel wool fiber    brucite fiber    asphalt mortar
出版日期:  2018-01-25      发布日期:  2018-01-25
ZTFLH:  U414.1  
基金资助: 青海省重大科技专项(2014-GX-A2A);中央高校基本科研业务费专项资金(310831161010)
引用本文:    
刘子铭,陈华鑫,熊锐,王泳丹,王小雯. 复掺钢丝绒纤维/水镁石纤维沥青胶浆性能研究[J]. 《材料导报》期刊社, 2018, 32(2): 295-300.
Ziming LIU,Huaxin CHEN,Rui XIONG,Yongdan WANG,Xiaowen WANG. Experimental Investigation on Properties of Steel Wool Fiber/Brucite Fiber Reinforced Asphalt Mortar. Materials Reports, 2018, 32(2): 295-300.
链接本文:  
https://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2018.02.027  或          https://www.mater-rep.com/CN/Y2018/V32/I2/295
Index Test method Unit Technical standard Measured value
Penetration(25 ℃,100 g,5 s) T0604 0.1 mm 80100 87
Ductility(15 ℃,5 cm/min) T0605 cm ≥100 >100
Softening point,TR&B T0606 ℃ 4252 45.6
Solubility T0607 g ≥99 99.8
Flash point (COC) T0611 ℃ ≥230 278
RTFOT
(165 ℃,85 min)		 Residual penetration
ratio		 T0604 % ≥60 66.7
Ductility
(10 ℃,5 cm/min)		 T0605 cm — 44
Softening point (TR&B) T0606 ℃ — 50
Table 1  Performance of KLM A-90# asphalt
Component SiO2 MgO Al2O3 Fe2O3 FeO CaO Na2O K2O H2O
Content/% 1—3 61—65 0.27 0.6—1 2—6 0.14 0.06 0.17 28.1
表2  水镁石纤维化学组成
图1  水镁石纤维微观形貌
图2  水镁石纤维外观形貌
图3  钢丝绒纤维微观形貌
图4  钢丝绒纤维外观形貌
图5  锥入度实验
图6  Brookfield旋转粘度仪
图7  动态剪切流变仪测试原理
图8  10 ℃延度实验结果
图9  延度试样
图10  抗剪强度随纤维掺量的变化结果
图11  不同纤维掺量下纤维沥青胶浆粘度实验结果
图12  不同纤维掺量下温度对纤维沥青胶浆G*/sinδ的影响
图13  频率对纤维沥青胶浆G*/sinδ的影响
图14  纤维沥青胶浆断面微观形貌
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