Study on Properties and Optimization of Ternary Auxiliary Cementing Materials for IOTs

Yannian Zhang; Xiangkun Zhang; Xiaowei Gu; Ting Wang; Bonan Liu

doi:10.3390/ma15113851

Study on Properties and Optimization of Ternary Auxiliary Cementing Materials for IOTs

Materials (Basel). 2022 May 27;15(11):3851. doi: 10.3390/ma15113851.

Authors

Yannian Zhang¹, Xiangkun Zhang¹, Xiaowei Gu², Ting Wang¹, Bonan Liu¹

Affiliations

¹ School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China.
² Science and Technology Innovation Center of Smart Water and Resource Environment, Northeastern University, Shenyang 110819, China.

Abstract

In order to control energy consumption and reduce pollution, the use of supplementary cementitious materials (SCMs) instead of cement to produce green cementitious materials can save energy, reduce emissions and achieve sustainable development. This study demonstrates the possibility of developing SCMs with iron tailings (IOTs), fly ash (FA) and ceramic powder (CP) ternary system, as well as the optimization and improvement scheme of gelation activation. The effects of activator dosage, mix ratio and substitution rate on mechanical properties of ternary SCMs system were investigated. The formation and evolution of hydration products were analyzed by differential thermogravimetric analysis (DTA) and scanning electron microscopy (SEM). The results of the study show that there is synergy in the system. The results show that there is synergy in the system and the hydration reaction is sufficient. At the substitution rate of 30%, the doping ratio of IOTs, CP and FA is 1:2:2 and the Ca(OH)₂ is 0.6%, the strength reaches 39.9 MPa and the activity index is 91.5%, which can provide a basis for the application and more in-depth study of IOTs multi SCMs.

Keywords: compressive strength; iron tailing; microstructure; supplementary cementitious materials.

Grants and funding

The financial support provided by the National Key Research and Development Program of China (No.2019YFC1907202) and Major Science and Technology Project of Liaoning Province (No. 2020JH1/10300005) to the first author is gratefully acknowledged.