Mechanical and Pressure-sensitive Properties of Cement Mortar Containing Nano-Fe2O3

DOI

10.2991/icmea-17.2018.48How to use a DOI?

Keywords

Nano-Fe2O3; cement mortar; mechanical property; pressure-sensitive property; functional material

Abstract

The mechanical and pressure-sensitive properties of nano-Fe2O3 cement paste were experimentally studied. The experimental results showed that, except at the 7-day age, the compressive strength of cement paste doped with different amounts of nano-Fe2O3 measured at the 14-day and 28-day ages had a steady increase compared with the control group. All peak values of intensity appeared in adding amounts of nano-Fe2O3 with 10 %. However, the increase of compressive strength at the 28-day age was less than those found at the 7-day and 14-day ages. The pressure-sensitivity was also progressively improved with the increase of adding amount of nano-Fe2O3, though the escalating trend leveled out when the adding amount of nano-Fe2O3 was more than 5 %. It is proposed that the improvement of compressive strength and pressure-sensitivity of cement paste with doped nano-Fe2O3 is attributed to the reason that nano-Fe2O3 fills the pores in the hydration product and accelerates overall hydration. Moreover, according to Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD) results, nano-Fe2O3 may react with Ca(OH)2 and produce additional C-S-H gel. The pozzolanic reaction has occurred. Thus, the compressive strength of cement paste doped with nano-Fe2O3 is increased. Meanwhile, the magnetism of nano-Fe2O3 is also the reason for the improvement in the pressure-sensitivity of cement paste.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yiqin Fang
AU  - Yaru Sun
AU  - Meiyuan Lu
AU  - Feng Xing
AU  - Weiwen Li
PY  - 2018/02
DA  - 2018/02
TI  - Mechanical and Pressure-sensitive Properties of Cement Mortar Containing Nano-Fe2O3
BT  - Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)
PB  - Atlantis Press
SP  - 206
EP  - 210
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmea-17.2018.48
DO  - 10.2991/icmea-17.2018.48
ID  - Fang2018/02
ER  -