基于灰色理论的粒径分布对磷建筑石膏抗折强度的影响

Effect of Particle Size on the Flexural Strength of PBG Based on Grey Theory

探究磷建筑石膏(PBG)粒径对其力学性能的影响对磷建筑石膏的生产有着重要意义。本工作以磷建筑石膏2 h抗折强度为衡量指标,以粒径参数D10、D50、D90为主要参数,采用灰色理论分析磷建筑石膏粒径分布特征对其力学性能的影响规律,实现了基于粒径参数的磷建筑石膏2 h抗折强度的预测。随着磷建筑石膏粒径分布发生变化,其标稠用水量和2 h抗折强度也发生了显著变化;灰关联分析表明对标稠用水量和抗折强度影响最大的为细端粒径参数D10。建立OGM(1,4)模型实现了基于粒径参数D10、D50、D90预测磷建筑石膏的标稠用水量,预测误差为3.59%;建立OGM(1,2)模型实现了基于标稠用水量预测磷建筑石膏2 h抗折强度,预测误差为7.49%;结合两个模型可以实现基于粒径参数的磷建筑石膏2 h抗折强度的预测。

It is important for the production of phosphogypsum to explore the influence of particle size of phosphogypsum on its mechanical properties.In this work,the bending strength of PBG at 2 h is taken as the measurement index,and the particle size parameters D10,D50 and D90 are taken as the main parameters.The influence law of particle size distribution characteristics of PBG on its mechanical properties is analyzed by using grey theory,and the prediction of bending strength of PBG at 2 h based on particle size parameters is realized.With the change of particle size distribution of PBG,the water requirement of normal consistency and bending strength at 2 h also changed significantly;grey correlation analysis shows that the parameter D10 of fine telomere diameter has the greatest influence on the water requirement of normal consistency and flexural strength;the OGM(1,4)model is established to predict the water requirement of normal consistency of PBG based on particle size parameters D10,D50 and D90,and the prediction error is 3.59%;the OGM(1,2)model is established to predict the bending strength of PBG at 2 h based on the water requirement of normal consistency,and the prediction error is 7.49%;Combining the two models,the bending strength of PBG at 2 h can be predicted based on particle size parameters.