院报 ›› 2017, Vol. 34 ›› Issue (6): 143-148.DOI: 10.11988/ckyyb.20160276

• 水工结构与材料 • 上一篇    下一篇

土石坝沥青混凝土心墙材料配合比试验研究

闫小虎1a,1b,2,姚新华3,王晓军1a,1b,杨华全1a,1b   

  1. 1. a.材料与结构研究所;b.水利部水工程安全与病害防治工程技术研究中心, 武汉 430010;
    2.河海大学 水利水电学院,南京 210098;
    3.新疆奴尔水利枢纽工程建设管理局,新疆 和田 848000
  • 收稿日期:2016-03-25 修回日期:2016-04-21 出版日期:2017-06-01 发布日期:2017-06-19
  • 作者简介:闫小虎(1984-),男,安徽阜阳人,工程师,博士研究生,主要从事水工建筑材料方面的研究,(电话)15927265766(电子信箱)610475209@qq.com。

Experimental Research on Mix Proportion of Asphaltic Concrete Core Material in Earth-rock Dams

YAN Xiao-hu1,2,3,YAO Xin-hua4, WANG Xiao-jun1,2,YANG Hua-quan1,2   

  1. 1.Department of Materials and Structure,Yangtze River Scientific Research Institute,Wuhan 430010,China;
    2.Research Center of Water Engineering Safety and Disease Control Engineering Technology under Ministry of Water Resources, Yangtze River Scientific Research Institute,Wuhan 430010,China;
    3.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China;
    4.Construction Administration of Xinjiang Nuer Water Control Project,Hetian 848000,China
  • Received:2016-03-25 Revised:2016-04-21 Online:2017-06-01 Published:2017-06-19

摘要: 传统观念认为水工沥青混凝土防渗结构中,碱性骨料可以与沥青中的表面活性物质产生化学吸附,有很好的黏附性;酸性骨料与沥青主要是物理吸附作用,与沥青的黏附性和耐久性无法保证,在长期浸水作用下,沥青膜易被水逐渐置换而从骨料表面剥离,从而导致结构破坏。奴尔水利枢纽工程坝址区内有丰富的酸性天然砂砾石料,距坝址较近,便于开采,但其附近没有碱性骨料料场。依托奴尔水利枢纽工程,采用人工灰岩骨料及天然砂砾料2种骨料,进行了室内沥青混凝土配合比性能试验研究,提出了级配指数r=0.40、填料F=12%、人工灰岩骨料沥青含量B=6.9%和天然砂砾石骨料沥青含量B=6.0%优选配合比,供设计参考。

关键词: 土石坝, 沥青混凝土心墙坝, 混凝土配合比, 奴尔水利枢纽, 天然砂砾石料

Abstract: In impervious structures such as hydraulic asphaltic concrete, alkaline aggregate is generally considered to be of good adhesion resulted from the chemisorption between alkaline aggregate and surface active materials of asphalt; while acidic aggregate could lead to structural damage as asphalt film is easily replaced by water and detached from aggregate under long-term water immersion because the physical adsorption could not guarantee the adhesion and durability of asphalt. By using artificial limestone and natural gravel aggregates, laboratory tests were conducted to research the mix proportion of hydraulic asphalt concrete for Nuer water control project in Xinjiang, which has rich natural acidic gravel aggregate near the dam site but no alkaline aggregate nearby. Optimization of mix proportion is proposed as follows gradation index r=0.40, filler content F=12%, asphalt content B=6.9% for concrete with artificial limestone aggregates, and B=6.0% for concrete with natural gravel aggregates.

Key words: earth-rock dam, dam with asphaltic concrete core, concrete mix proportion, Nuer water control project, natural gravel aggregate

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