Advances in concrete construction

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Investigation on compression properties of seawater-sea sand concrete

  • Chen, Zongping (College of Civil Engineering and Architecture, Guangxi University) ;
  • Mo, Linlin (College of Civil Engineering and Architecture, Guangxi University) ;
  • Song, Chunmei (College of Civil Engineering and Architecture, Guangxi University) ;
  • Zhang, Yaqi (College of Civil Engineering and Architecture, Guangxi University)
  • Received : 2021.03.06
  • Accepted : 2021.06.21
  • Published : 2021.08.25
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Abstract

This paper introduces the experimental results of the influence of sea sand replacement rate and mixing water on the basic mechanical properties of sea sand concrete. A total of thirty test blocks were designed for uniaxial compression test. In this test two parameters were considered: (a) sea sand replacement ratio (i.e., 0%, 25%, 50%,75%, 100%); (b) water for mixing (i.e., freshwater, seawater). The entire stress-strain curve of sea sand concrete under uniaxial compression was obtained. Based on the test results, the influence of sea sand replacement rate and mixing water on the peak stress, peak strain, and deformation performance of sea sand concrete were analyzed. Test results showed that the stress-strain curves of seawater sea sand concrete were steeper than that of ordinary concrete, which indicated that seawater sea sand concrete was slightly more brittle. On the whole, the sea sand replacement rate had no significant effect on the axial compressive properties of sea sand concrete. Under the same sea sand replacement rate, the deformation performance of freshwater sea sand concrete (FSC) was slightly greater than that of seawater sea sand concrete (SSC). Seawater had an enhanced effect on the early strength development of sea sand concrete.

Keywords

Acknowledgement

This research report was financially supported by the National Natural Science Foundation of China (No. 51578163), Bagui Scholars Special Funding Project ([2019] No. 79) and the Science and Technology Base and Talent Special Project of Guangxi (No. AD21075031). The authors are very grateful for the support of the above project funds.

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