南京林业大学学报(自然科学版) ›› 2010, Vol. 34 ›› Issue (06): 105-99.doi: 10.3969/j.jssn.1000-2006.2010.06.023

• 研究论文 • 上一篇    下一篇

抑制砂岩骨料碱活性膨胀效果的对比分析

叶伟1,李国芬1*,肖军2,张高勤1   

  1. 1.南京林业大学土木工程学院,江苏南京210037;2.高速地产集团有限公司,安徽合肥230000
  • 出版日期:2010-12-27 发布日期:2010-12-27
  • 基金资助:
    收稿日期:2009-12-21修回日期:2010-06-23作者简介:叶伟(1985—),硕士生。*李国芬(通信作者),教授。Email: lgf@njfu.com.cn。引文格式:叶伟,李国芬,肖军,等.

Contrastive analysis of restraining the alkali active inflation effect of the sandstone aggregate

YE Wei1, LI Guofen1*, XIAO Jun2, ZHANG Gaoqin1   

  1. .College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China; 2.HighSpeed Real Estate Group Co., Ltd., Hefei 230000, China
  • Online:2010-12-27 Published:2010-12-27

摘要: 通过混凝土棱柱体法、60 ℃快速混凝土棱柱体法及全级配混凝土棱柱体法,分析了抑制砂岩骨料碱活性膨胀所采取的骨料替换措施的有效性。结果表明:采用大理岩人工砂 替代砂岩细骨料的组合骨料对砂岩碱活性膨胀具有明显的抑制作用;水泥品种对砂岩碱活性膨胀有一定的影响;在混凝土中掺30 %粉煤灰可显著抑制砂岩碱活性膨胀;大坝混凝土 浇筑后,养护温度应控制在38 ℃左右为宜。

Abstract: The validity of the aggregate replacement measure for restraining alkali active inflates of sandstone aggregate was analyzed by three methods including concretes prism method, fast concretes prism method at 60 ℃, and the entire gradation concretes prism method. Analysis results indicated that a obvious effect of inhibiting alkali active inflation of sandstone was observed by replacing the combined aggregate of sandstone thin aggregate with marble artifical granulated substance, and the cement variety also gave some influence on the sandstone alkali active inflation. The sandstone alkali active inflation can be remarkably inhibited by adding 30 % of pulverized coal ash to the concretes. The suitable curing temperature should be controlled at around 38 ℃ after the constructing dam concretes.

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