摘要
为了研发适用于微细粒尾矿固结的矿渣胶凝材料,以粒化高炉矿渣为主要原料,采用Design-Expert软件中的响应面实验设计,考查了熟料、石膏配比及其交互作用对矿渣胶凝材料抗压强度的影响,并通过对实验结果的回归分析,提供了各因素对抗压强度影响的可视化模型。结果表明:与石膏相比,熟料为更为显著的影响因素,且随着养护龄期的延长,矿渣水化对熟料的需求量增加,对石膏的需求量减少;拟合的二阶回归方程模型具有良好可靠性,以3d养护龄期的抗压强度最大值为优化目标,可得出预测优化方案中熟料、石膏占矿渣质量的最佳百分比分别为52.47%、19.36%。与P·O 42.5普通硅酸盐水泥相比,矿渣胶凝材料具有早强和高效的特点,同等条件下,其3、28d的抗压强度可分别提高122%和104%以上。
In order to prepare the slag cementitious materials for the cementation of ultrafine tailings,granulated blast furnace slag（GBFS）was mixed with clinker and gypsum powders under different proportions and the effect of the proportions of clinker and gypsum and their interaction on the performance of the slag cementitious material was studied by using response surface design in Design-Expert software.Based on the regression analysis of test results,a visual model was provided.The results show that clinker is a more significant influencing factor than gypsum,and with the extension of curing age,the demand of slag hydration for clinker is increased,but the demand for gypsum is reduced.The fitting of the two order regression equation model has good reliability.With the maximum of the compressive strength at 3days as the optimized goal,the optimal ratios of clinker/slag and gypsum/slag were predicted as 52.47% and 9.36% respectively.Compared with P·O 42.5ordinary Portland cement（OPC）,the prepared slag cementitious material has the characteristics of early strength and high efficiency.With the same dosage,after a curing period of 3and 28 days,its compressive strength can be increased by 122% and 104% respectively.
出处
《山东科技大学学报（自然科学版）》
CAS
2017年第2期34-41,共8页
Journal of Shandong University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(51674161)
高等学校博士学科点专项科研基金项目(20133718110005)
山东省2016年重点研发计划项目(2016GSF116013)
青岛市黄岛区科技计划项目(2014-1-37)
关键词
响应面设计
粒化高炉矿渣
水泥熟料
石膏
response surface design
granulated blast furnace slag
cement clinker
gypsum
