混凝土再生骨料—赤泥充填材料的抗压强度及电阻率特性研究

Study on compressive strength and resistivity characteristics of recycled concrete aggregate-red mud filling material

将废旧混凝土及赤泥应用于膏体充填开采,既解决了膏体充填材料原材料不足的问题,又可以实现建筑、工业固废的资源化利用,带来良好的环境效益。以废旧混凝土作为骨料,赤泥取代大部分水泥作为主要胶结料,制备膏体充填材料。通过研究其立方体抗压强度及电阻率特性,得到在混凝土再生骨料∶赤泥为2∶1时,试样达到最大抗压强度,且其电阻率值与抗压强度呈线性正相关关系。在工程应用时,可选用这一配合比,并可通过测量电阻率值反映其抗压强度指标。

The application of concrete solid waste and red mud in paste filling mining can not only solve the problem of insufficient raw materials of paste filling materials,but also realize the resource utilization of construction and industrial solid waste and bring good environmental benefits.In this study,the paste filling material was prepared by using concrete solid waste as aggregate and red mud instead of most cement as main cementing material.By studying its cubic compressive strength and resistivity characteristics,it is found that when the ratio of recycled concrete aggregate to red mud is 2∶1,the sample reaches the maximum compressive strength,and its resistivity value has a linear positive correlation with compressive strength.In engineering application,this ratio can be selected,and its compressive strength index can be reflected by measuring resistivity value.