...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials and structures >Impact of rapid-hardening cements on mechanical properties of cement bitumen emulsion asphalt
【24h】

Impact of rapid-hardening cements on mechanical properties of cement bitumen emulsion asphalt

机译：快速硬化水泥对水泥沥青乳化沥青力学性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cement bitumen emulsion asphalt (CBEA) is obtained by mixing bitumen emulsion, cement, aggregates and filler at ambient temperature. CBEA is thought to be a promising substitute for hot mix asphalt because of its low environmental impact and cost-effectiveness. Disadvantages of this material are the long time required to reach its full strength and the inadequate understanding of the hardening mechanisms. This study aims at accelerating the development of mechanical properties of CBEA by using rapid-hardening cements while at the same time gaining a deeper understanding of the role of cement in CBEA. With this purpose, cold mix asphalt mixtures with cationic and anionic emulsions and different types of cement (ordinary Portland, calcium sulfoaluminate and calcium aluminate cement) were studied by means of isothermal calorimetry, measurements of water evaporation and Marshall tests. The results indicate that both anionic and cationic bitumen emulsions may affect the initial hydration rates of the cements used but have no significant influence on their degree of hydration after a few days. The addition of calcium sulfoaluminate and calcium aluminate cement to CBEA leads to mechanical properties after 1-day curing similar to those obtained with Portland cement after 1-week curing. Cement hydration dominates the strength gain, especially for rapid-hardening cements, and the type of cement influences both the amount of bound water and the rate of water evaporation from the CBEA.
机译：水泥沥青乳液沥青（CBEA）是在环境温度下将沥青乳液，水泥，集料和填料混合而成的。 CBEA因其对环境的低影响和成本效益而被认为是热拌沥青的有前途的替代品。这种材料的缺点是要达到其全部强度需要很长时间，并且对硬化机理的理解不足。这项研究旨在通过使用快速硬化水泥促进CBEA力学性能的发展，同时加深对水泥在CBEA中的作用的了解。为此，通过等温量热法，水蒸发测量和马歇尔试验研究了具有阳离子和阴离子乳液以及不同类型水泥（普通波特兰水泥，硫铝酸钙和铝酸钙水泥）的冷拌沥青混合料。结果表明，阴离子和阳离子沥青乳液均会影响所用水泥的初始水合速率，但几天后对其水合度没有明显影响。将硫铝酸钙和铝酸钙水泥添加到CBEA中可导致1天固化后的机械性能与1周固化后使用硅酸盐水泥获得的机械性能相似。水泥的水化作用主要是强度的增加，特别是对于快速硬化的水泥，水泥的类型会影响结合水的量和从CBEA蒸发的水的速率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号