为了研究PVA纤维和水泥对钼尾矿砂的稳定效果,进行了PVA纤维增强水泥稳定钼尾矿的无侧限抗压试验.通过单掺试验结合正交试验研究了纤维掺量、纤维长度、水泥掺量对纤维增强水泥稳定钼尾矿无侧限抗压强度的影响趋势和影响程度.试验结果表明:纤维和水泥对钼尾矿的稳定效果明显,随着纤维掺量的增大,纤维增强水泥稳定钼尾矿的无侧限抗压强度和残余强度均呈现先增大后减小的趋势;随着水泥掺量的增大,纤维增强水泥稳定钼尾矿的无侧限抗压强度呈线性增大趋势,残余强度也不断提高;纤维长度对钼尾矿无侧限抗压强度的影响不明显;三种因素对钼尾矿无侧限抗压强度的影响程度由大到小依次为水泥掺量、纤维掺量、纤维长度.最佳配合比为:水泥掺量8%,纤维掺量0.2%,纤维长度12mm.研究结果为钼尾矿的再利用提供参考.
In order to study the stability effect of PVA fiber and cement on molybdenum tailings,unconfined compressive tests were conducted on PVA fiber reinforced cement stabilized molybdenum tailings.Through single admixture experiment and orthogonal experiment,the influence trend and degree of fiber content,fiber length and cement content on the unconfined compressive strength of fiber reinforced cement stabilized molybdenum tailings were studied.The results showed that fiber and cement had obvious stability effect on molybdenum tailings.With the increase of fiber content,the unconfined compressive strength and residual strength of fiber reinforced cement stabilized molybdenum tailings both showed a trend of increases at first and decreases followed.With the increase of cement content,the unconfined compressive strength of fiber reinforced cement stabilized molybdenum tailings showed a linear increase trend,and the residual strength was also constantly improved.The influence of fiber length on unconfined compressive strength of molybdenum tailings was not obvious.The influences of three factors on the unconfined compressive strength of molybdenum tailings were in descending order of cement content,fiber content,and fiber length.The optimum mix ratio is cement content of 8%,fiber content of 0.2%,fiber length of 12mm.The research results provide reference for the reuse of molybdenum tailings.