磷渣细度对水泥石脆性和孔结构的影响研究

Study on effect of fineness of phosphorus slag on brittleness and pore structure of cement stone

研究了不同细度和掺量的磷渣对水泥石脆性和孔结构的影响。试验结果表明,当磷渣比表面积较小时,与基准水泥石相比,掺磷渣反而使其脆性系数降低,但当磷渣的比表面积达到350 m2/kg,同时磷渣掺量不高时,随着磷渣比表面积的增大,脆性系数有减小的趋势。磷渣掺量在30%以下时,磷渣细度对水泥石的平均孔径没有明显影响,但较细的磷渣可降低水泥石的最可几孔径及孔隙率;随着磷渣比表面积的增大,早期水泥石中大于50 nm有害孔的相对比例有增加的趋势,但后期明显减小。

The effect of fineness and content of phosphorus slag in cement on brittleness and pore structure of cement stone was studied.The results show that when the surface area of phosphorus slag was small,the brittle coefficient of the cement stone mixed with phosphorous slag is less than that of pure cement stone.But if the surface area of phosphorus slag reaches 350 m2/kg and the content of phosphorus slag is relatively small,the brittle coefficient has a decreased trend with the increasing of phosphorus slag surface area.When the content of phosphorus slag is less than 30%,the fineness of phosphorus slag has no significant effect on average pore size.But finer phosphorus slag can reduce the most probable pore size and porosity of cement stone.With the increasing of phosphorous slag surface area,the proportion of the harmful holes 50nm has a significant increasing trend during the early stage,but it reduces significantly at latter stage.