Analysis of Active Mechanism of Chemical Activated Strontium Slag
Advances in Materials
Volume 8, Issue 4, December 2019, Pages: 170-175
Received: Oct. 16, 2019;
Accepted: Nov. 6, 2019;
Published: Nov. 21, 2019
Views 589 Downloads 203
Hongzhou Zhu, Opening Funding Supported by the Key Laboratory of Road Structure & Material Ministry of Transport, Beijing, People's Republic of China; National and Local Joint Engineering Laboratory of Traffic Civil Engineering Materials, Chongqing Jiaotong University, Chongqing, People's Republic of China; Department of Civil Engineering, Chongqing Jiaotong University, Chongqing, People's Republic of China
Li Ou, Department of Civil Engineering, Chongqing Jiaotong University, Chongqing, People's Republic of China
Daqian Wang, Department of Civil Engineering, Chongqing Jiaotong University, Chongqing, People's Republic of China
Lanxin Hu, Department of Civil Engineering, Chongqing Jiaotong University, Chongqing, People's Republic of China
Erhu Yan, Opening Funding Supported by the Key Laboratory of Road Structure & Material Ministry of Transport, Beijing, People's Republic of China
Follow on us
In order to improve the activity of strontium slag, the mixed cementitious material of strontium slag cement was prepared by adding 30% (mass fraction) of pulverized strontium slag into cement. Chemical activators such as Na2SiO4, NaOH, CaCl2, NaCl, Ca(OH)2, Na2SO4 were added to the cementitious material. The flexural and compressive strength values of 3d, 7d, 28d were obtained by mortar strength test, and were used as the base with standard samples. The mechanism of activator improving the activity of strontium slag is analyzed. CaCl2 and NaCl are cement early strength agents. So the substitution of strontium slag with silica powder is compared. The strength of strontium slag is judged by principle analysis. The results show that NaOH and Ca(OH)2 are beneficial to the activation of SiO2 and Al2O3, but the amount of ettringite is large and the strength is reduced, so there is a certain active excitation for strontium slag, but the effect is not very good; the addition of Na2SiO4 causes damage to volume stability and it is the worst of all activators. the compressive strength increases rapidly in 3d and 7d after adding NaCl, so it is mainly to stimulate the early strength of cement; The 28d compressive strength of strontium slag cement containing CaCl2 is higher than that of strontium slag cement containing other chemical activators, which can reach 91% of the compressive strength of cement mortar. It is preliminarily judged that CaCl2 has an exciting effect on strontium slag and the exciting effect is obvious.
Pulverized Strontium Slag, Chemical Activation, Activity, Mechanism
To cite this article
Analysis of Active Mechanism of Chemical Activated Strontium Slag, Advances in Materials.
Vol. 8, No. 4,
2019, pp. 170-175.
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
ZHANG Qingli, WANG Aiguang, WU Weidong. The current status and developing trend of industrial strontium carbonate production in China [J]. Inorganic Chemicals Industry, 2005 (08): 1-4.
ZHANG Li. Preparation and process study of strontium carbonate from Industrial waste strontium [D]. Chongqing: Chongqing University, 2012.
Jang J G, Park S M, Lee H K. Physical barrier effect of geopolymeric waste form on diffusivity of cesium and strontium [J]. Journal of hazardous materials, 2016, 318: 339-346.
XU Longjun, QU Ge, ZHAO Qing, et al. Pollution actuality of st-rontium tailings & waste residues and progress on resourceful utilization [J]. Resources Environment & Engineering, 2008 (02): 222-224+242.
Wang T, Tao Q, Xie Z. Performance and Environmental Evaluation of Stabilized Base Material with Strontium Slag in Low-Volume Road in China [J]. Advances in Civil Engineering, 2019, 2019.
ZHU Hongzhou, HE Lihong, ZOU Xiaoling. Applied research on strontium slag concrete pavement in low traffic volume roads [C]// International Conference on Transportation Engineering. 2013: 1208-1213.
Wang T, Tang B. Utilization of pulverized strontium slag as the admixture of Portland cement [J]. Journal of Thermal Analysis and Calorimetry, 2018, 132 (1): 285-291.
Zhu Hongzhou, Zhong Weiming, Tian Wenyu. Performance of mortar containing strontium slag [J]. Journal of Chongqing Jiaotong University (Natural Science), 2018, 37 (04): 34-38.
Zhu Hongzhou, Liao Nengwu, Zhang Minggong, Tian Wenyu. Evaluation of road performance of cement strontium slag concrete [J]. Bulletin of the Chinese Ceramic Society, 2018, 37 (02): 483-489.
Zhu Hongzhou, Ge Qi, Tian Wenyu. Design and perfoemance evaluation on mixture of lime strontium ore waste slag crushed stone base course [J]. Highway, 2017, 62 (10): 224-228.
Zhu Hongzhou, Zhong Weiming, Tian Wenyu, Xiang Hao, Yang Yang. Effect of pulverized strontium slag on mechanical properties of cement mortar [J]. Bulletin of The Chinese Ceramic Society, 2017, 36 (08): 2855-2860.
Si Chenhao. Research on the leaching characteristics of strontium slag and treatment of acid mine wastewater [D]. Anhui: Anhui University of Technology, 2017.
TIAN Wenyu, TANG Boming, WANG Guoan. Specific strength indicators analysis of the activity of strontium slag based on the smount [J]. Concrete, 2008 (10): 58-61.
TIAN Wenyu, TANG Boming, YU Zhilong. Influence of combus-tion temperature on strength activity of pulverized strontium slag [J]. Journal of Building Materials, 2009, 12 (02): 136-140.
TIAN Wenyu, TANG Boming, WANG Guoan. Influence of curin-g conditions on the activity of grinding strontium slag with spec-ific strength index [J]. Journal of China & Foreign Highway, 2008, 28 (06): 208-212.