基于RSM-DF的矿渣胶凝材料复合激发剂配比优化

doi:10.13722/j.cnki.jrme.2019.0718

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Abstract In view of the problems of the poor filling effect and high cost of cemented cementing material used for fine unclassified tailings cement filling. The low-cost mine filling cementitious materials is developed by using ground granulated blast furnace slag powder(GGBFSP). In order to effectively stimulate the activity of GGBFSP，on the basis of a large number of exploratory tests in the early stage，the multi-objective optimization method of (RSM-DF) was used to carry out the compounding agent optimization experimen. Firstly，the physicochemical properties of the test materials were analyzed. Secondly，based on the influencing factors and the corresponding level determined by the previous experiment，13 groups of experiments were designed and carried out by using Box-Behnken Response Surface Methodology in Design-Expert software. And according to the results，response surface regression model is established to study the influence of three factors and their interaction on 28 d strength，slurry slump and bleeding rate. Then on this basis，the multi-objective optimization method of satisfaction was used to optimize the ratio of composite activator. The results show that the three responses of 28 d strength，slump and bleeding rate are not only affected by a single factor，but also by the interaction between factors. The optimized proportion of composite cementitious material is：clinker content is 4%，desulfurization ash content is 19%，mirabilite content is 0.5%，the GGBFSP is 76.5%. And the verification test was carried out at this ratio，and the 28 d strength，slurry slump，and bleeding rate is 3.42 MPa，18.6 cm，and 6.1%，respectively，which meet the requirements of high-concentration gravity flow transportation. Finally，the hydration mechanism of new filling cementitious material was studied by XRD and SEM，which provided theoretical basis for the utilization of new cementitious material in mines.

Key words： mining engineering filling mining cementitious material ground granulated blast furnace slag powder(GGBFSP) response surface methodology and desirability function(RSM-DF) multi-objective optimization hydration mechanism

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	Articles by authors
	WEN Zhenjiang1
	2
	GAO Qian1
	2
	WANG Zhonghong3
	YANG Xiaobing1
	2

Cite this article:

WEN Zhenjiang1,2,GAO Qian1, et al. Optimization of compound activator ratio of the ground granulated blast furnace slag powder cementitious material based on RSM-DF[J]. , 2020, 39(S1): 3103-3113.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.0718 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/IS1/3103

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