表面活性剂对全尾砂胶结充填料强度及流动性作用机理研究

根据表面活性剂的作用原理,采用物理化学方法,对添加两种不同活性剂的全尾砂胶结填料的强度及流动性分别进行试验研究。试验采用三因子五水平二次回归正交设计,得出掺有活性剂的充填料试块7天、14天、28天的单轴抗压强度方程。试验结果表明,表面活性剂的增强作用与其种类和自身的掺入量有关,也与全尾砂胶结充填料的砂灰比有关,而与充填料的浓度关系不大。通过坍落度的测试,认为表面活性剂可显著地改善全尾砂胶结充填料的流动性,因而可增大充填倍线。

A STUDY ON EFFECT MECHANISM OF SURFACE-ACTIVEAGENT ON STRENGTH AND FLUIDITY OF CEMENTEDFILL WITH UNCLASSIFIED TAILINGS

According to effect plinciple of surface-active agent experiment study on strength and fluidith of two cemented fills with unclassified tailings in which was added a different active agent was performed using physicochemical methods. The equation of uniaxial compressive strength of cubic specimen of filling material with surface-active agent for 7,14 and 28 days age was derived from triple factors quintic level quadratic regression orthogonal design in the experiment process. The experiment results indicated that strengthening effect of ,1 surface-active agent is dependent on its type and dosage as well as on cementsand ratio of cemented fill,but to a less extent on the concentration of filling material. Collapsibility test shown that surface-active agent is able to improve fluidity of unclassified tailing fill material greatly, thus to increase fill line.