JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2016, Vol. 46 ›› Issue (6): 89-96.doi: 10.6040/j.issn.1672-3961.0.2016.091

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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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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

CLC Number: 

  • TU528.041
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