Nuclear magnetic resonance analysis of freeze-thaw damage in natural pumice concrete

Authors

  • Xiaoxiao Wang College of Civil Engineering, Inner Mongolia University of Technology - College of Water Conservancy and Civil Engineering , Inner Mongolia Agricultural University
  • Xiangdong Shen College of Water Conservancy and Civil Engineering , Inner Mongolia Agricultural University
  • Hailong Wang College of Water Conservancy and Civil Engineering , Inner Mongolia Agricultural University
  • Chu Gao College of Water Conservancy and Civil Engineering , Inner Mongolia Agricultural University
  • Tong Zhang College of Water Conservancy and Civil Engineering , Inner Mongolia Agricultural University

DOI:

https://doi.org/10.3989/mc.2016.09014

Keywords:

Natural pumice concrete, Damage extension, Nuclear magnetic resonance (NMR), Porosity, Relaxation time

Abstract


This paper presents an analysis of the damage propagation features of the pore structure of natural pumice lightweight aggregate concrete (LWC) under freeze-thaw cyclic action. After freeze-thaw cycling, we conducted nuclear magnetic resonance (NMR) tests on the concrete and acquired the porosity, distribution of transverse relaxation time T2, and magnetic resonance imaging (MRI) results. The results showed the following. The T2 distribution of the LWC prior to freeze-thaw cycling presented four peaks representative of a preponderance of small pores. After 50, 100, 150, and 200 freeze-thaw cycles, the total area of the T2 spectrum and the porosity increased significantly. The MRI presented the changing spatial distribution of pores within the LWC during freeze-thaw cycling. Ultrasonic testing technology was applied simultaneously to analyze the NMR results, which verified that the new NMR technology demonstrated high accuracy and practicability for research regarding freeze-thaw concrete damage.

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Published

2016-06-30

How to Cite

Wang, X., Shen, X., Wang, H., Gao, C., & Zhang, T. (2016). Nuclear magnetic resonance analysis of freeze-thaw damage in natural pumice concrete. Materiales De Construcción, 66(322), e087. https://doi.org/10.3989/mc.2016.09014

Issue

Section

Research Articles