中文核心期刊
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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2018, Vol. 37 ›› Issue (05): 29-33.DOI: 10.3969/j.issn.1674-0696.2018.05.06

• 道路与铁道工程 • 上一篇    下一篇

PVA纤维水泥稳定碎石拌和均匀性研究

曹源文1，赵毅2，王棋1，夏柱林3，郑南翔4   

  1. 1. 重庆交通大学 机电与汽车工程学院，重庆 400074； 2. 重庆交通大学 材料科学与工程学院，重庆 400074； 3. 安徽省交通控股集团有限公司，安徽 合肥 230088； 4. 长安大学 公路学院，陕西 西安710064；)
  • 收稿日期:2017-08-27 修回日期:2017-10-22 出版日期:2018-05-15 发布日期:2018-05-15
  • 作者简介:曹源文（1963—），女，河北唐山人，教授，主要从事工程机械方面的研究。E-mail：37532992@qq.com。 通信作者：赵毅(1980—)，男，河北保定人，副教授，博士，主要从事高性能筑路材料方面的研究。E-mail：1585513635@qq.com。
  • 基金资助:
    安徽省交通科技基金项目(Ahjtkj20130051)

Mixing Uniformity of Cement Stabilized Macadam with PVA Fiber

CAO Yuanwen1, ZHAO Yi2, WANG Qi1, XIA Zhulin3, ZHENG Nanxiang4   

  1. (1. School of Mechatronics and Automotive Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China; 2.School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China； 3. Anhui Transportation Holding Group Co. Ltd., Hefei 230088, Anhui, P. R. China; 4. School of Highway, Changan University, Xian 710064, Shaanxi, P. R. China)
  • Received:2017-08-27 Revised:2017-10-22 Online:2018-05-15 Published:2018-05-15

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摘要： 为了研究如何将PVA纤维均匀的分散在水泥稳定碎石基层材料中，进行了多种拌和工艺方案下添加PVA的水泥稳定碎石拌和试验。采用质量分数比例系数与质量分数比例系数的离差系数 来判断PVA纤维水泥稳定碎石的均匀性，分析了在不同投料顺序、搅拌速度、单机搅拌量等拌和工艺下，PVA纤维水泥稳定碎石拌和均匀性随时间的变化规律。研究表明：不同投料顺序下，混 合料的质量分数比例系数的离差系数趋于平稳时普遍大于PVA纤维的质量离差系数。单从拌和稳定性的角度考虑，PVA纤维水泥稳定碎石最佳投料顺序为先投入集料和PVA纤维束，再加入水泥和 水继续搅拌。混合料质量分数比例系数离差系数和PVA纤维质量离差系数值达到最小值的拌和时间均随单机搅拌量的增加而增加、随搅拌速度的增加而减小。推荐WDZ-600型稳定土拌和站的最 佳单机搅拌量V=615 L，最佳搅拌轴转速为ω=48 r/min，最佳拌和时间为35 s。

关键词: 道路工程, PVA纤维, 拌和工艺, 拌和均匀性, 水泥稳定碎石

Abstract: In order to study how to disperse PVA fiber evenly in cement stabilized macadam base material, the test of cement stabilized macadam mixing with PVA fiber in the different mixing schemes was carried out. The mass fraction ratio coefficient and its deviation coefficient were used to judge the uniformity of cement stabilized macadam mixing with PVA fiber. The variation rule of the uniformity of cement stabilized macadam mixing with PVA fiber changing with the mixing time under conditions with different feeding sequence, different stirring speed, and different single mixing amount was analyzed. The results show that under different feeding sequence, the deviation coefficient of mass fraction coefficient of mixture tends to be stable, which is generally larger than the mass deviation coefficient of PVA fiber. Only Considering the stability of mixing only, the best feeding sequence of PVA fiber cement stabilized macadam is to put the aggregate and PVA fiber bundles first, and then to add cement and water to continue mixing. When the deviation coefficient of mass fraction coefficient of mixture and the mass deviation coefficient of PVA fiber reach the minimum value, both the mixing time is increased with the increase of single machine agitation and is decreased with the increase of stirring speed. It is recommended that the optimum mixing amount V for single machine is 615 L for the WDZ-600 stabilized soil mixing station, the optimum rotating shaft speed ω is 48 r/min, and the optimum mixing time is 35 s.

Key words: highway engineering, PVA fiber, mixing process, mixing uniformity, cement stabilized macadam

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