Study on mechanical properties of cement mortar with different amount of coal gangue and activator Na2SO4

DOI

10.2991/ifeesm-17.2018.217How to use a DOI?

Keywords

Coal gangue; Activation; Chemical activator; mechanical property

Abstract

The phase and composition of Liupanshui coal gangue were determined by XRD and XRF analysis. The coal gangue is calcined at 600°C for 2h, grind 200 mesh, and the optimum amount of coal gangue is determined by testing cement mortar with different proportions and testing its compressive and flexural mechanical properties. Under the optimum dosage of coal gangue, the chemical activator Na2SO4 is added to cement mortar in different proportion to study its influence on the mechanical properties of cement mortar. The results show that the proper amount of coal gangue has little effect on the mechanical properties of cement mortar. When the addition amount is more than 70%, the compressive strength of cement mortar will be reduced remarkably. The optimum amount of coal gangue is 50%, and its compressive strength can reach 23.31MPa in 28 days. As the chemical activator Na2SO4 is added. The optimum addition amount of Na2SO4 was 3%, then compressive strength of specimens 3d and 28d reached 11.23MPa and 23.59MPa respectively.

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  - Bingke Qin
AU  - Yonghua Ji
AU  - Zhiling Bai
AU  - Qingkao Zhao
PY  - 2018/02
DA  - 2018/02
TI  - Study on mechanical properties of cement mortar with different amount of coal gangue and activator Na2SO4
BT  - Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)
PB  - Atlantis Press
SP  - 1182
EP  - 1185
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-17.2018.217
DO  - 10.2991/ifeesm-17.2018.217
ID  - Qin2018/02
ER  -