• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Fly Ash with Different Particle Size Distributions on the Properties and Microstructure of Concrete
【24h】

Effect of Fly Ash with Different Particle Size Distributions on the Properties and Microstructure of Concrete

机译：粉煤灰具有不同粒度分布对混凝土性能和微观结构的影响

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

Fly ash has become an important component of concrete as a supplementary cementitious material. Fly ash, as an admixture in concrete, has a great impact on the improvement of concrete properties and utilization of resources. In this work, fly ashes with different particle size distributions (S. Tsivilis, Andersen, normal and F distributions) were selected to prepare concrete. The relationships among the particle size distribution of the fly ash, compressive strength, hydration, pore structure and microstructure of the concrete were studied. The results showed that the compressive strength of the concrete increased at 28 d with fly ashes with the S. Tsivilis and F distributions. Moreover, the porosity of the concrete at 28 d was reduced, and the pore structure of the concrete was improved. The early compressive strength of the concrete increased with the fly ash with a normal distribution. The second hydration heat release rate of the concrete with fly ashes with a normal distribution and an F distribution was obviously faster. In addition to the Andersen distribution, other distributions of fly ash had obvious improvement effects on the pore structure of the concretes. High-performance concrete can be made from fly ash with different particle sizes, which avoids the need for ultrafine grinding with a high energy consumption and high-cost chemical excitation processes.
机译：粉煤灰作为辅助胶凝材料已成为混凝土的重要组成部分。粉煤灰作为混凝土中的外加剂，对混凝土性能的改善和资源的利用有很大的影响。在这项工作中，选择具有不同粒径分布（S.Tsivilis、Andersen、正态分布和F分布）的粉煤灰来制备混凝土。研究了粉煤灰粒径分布与混凝土抗压强度、水化性能、孔结构和微观结构之间的关系。结果表明，掺入S.Tsivilis和F分布的粉煤灰后，混凝土的抗压强度在28d时有所提高。此外，28d时混凝土的孔隙率降低，混凝土的孔结构得到改善。随着粉煤灰掺量的增加，混凝土的早期抗压强度呈正态分布。掺粉煤灰混凝土的二次水化放热速率明显快于正态分布和F分布。除安德森分布外，粉煤灰的其他分布对混凝土的孔结构也有明显的改善作用。高性能混凝土可以由不同粒径的粉煤灰制成，这避免了使用高能耗和高成本的化学激发工艺进行超细粉碎的需要。

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