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山东大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (6): 89-96.doi: 10.6040/j.issn.1672-3961.0.2016.091

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废旧橡胶粉对混合骨料混凝土力学特征的影响

王海龙,王培,王磊,张克   

  1. 内蒙古农业大学水利与土木建筑工程学院, 内蒙古 呼和浩特 010018
  • 收稿日期:2016-03-09 出版日期:2016-12-20 发布日期:2016-03-09
  • 作者简介:王海龙(1980— ),男,内蒙古呼和浩特人,副教授,硕导,博士,主要研究方向为新型建筑材料. E-mail:nndwhl@126.com
  • 基金资助:
    国家自然科学基金资助项目(51369023,51669026);内蒙古自然科学基金资助项目(2015MS0564)

Mechanical characteristics effect of waste rubber powder on combined aggregate concrete

WANG Hailong, WANG Pei, WANG Lei, ZHANG Ke   

  1. WANG Hailong, WANG Pei, WANG Lei, ZHANG Ke(College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, Inner Mongolia, China
  • Received:2016-03-09 Online:2016-12-20 Published:2016-03-09

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摘要： 为拓展废旧轮胎、再生骨料及天然浮石的应用范围,研究了在1∶1(再生骨料和天然浮石体积比为1∶1)混合骨料中外掺不同粒径(粒径20目、60目、80目、100目、120目)和不同掺量(掺量3%、6%、9%)的废旧橡胶粉,分析混合骨料混凝土的早期力学性能和微观结构。试验结果表明:在粒径相同的条件下,废旧橡胶粉使混合骨料混凝土的抗压强度降低率增大;掺量相同时,80目抗压强度下降率最大;从环境扫描电镜中得出,橡胶粉、再生骨料、浮石与水泥界面是薄弱区域,是造成混合骨料混凝土强度降低的主要原因。

关键词: 天然浮石, 再生骨料, 混合骨料混凝土, 力学特征, 废旧橡胶粉

Abstract: To expand the application of waste tire, recycled aggregate and natural pumice, this research studied the scrapped rubber powder that was mixed with different grain diameters(20, 60, 80, 100, and 120 mesh)and different mixing amounts(3%, 6%, and 9%)into 1∶1(the volume ratio of recycled aggregate and natural pumice was 1∶1)combined aggregate, and analyzed the early mechanical properties and microstructure of combined aggregate concrete. The experiment results showed that under the condition of the same grain diameter, the decreasing rate of combined aggregate concretes compressive strength because of scrapped rubber powder increased; under the condition of the same mixing amount, the descent rate of the compressive strength of 80 mesh was at the maximum; it could be obtained from environment scanning electron microscope that rubber powder, recycled aggregate, pumice and concrete interface were weak areas, and they were major reasons that led to the strength decrease of combined aggregate concrete.

Key words: natural pumice, recycled aggregate, combined aggregate concrete, mechanical characteristics, waste rubber powder

中图分类号: 

  • TU528.041
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