To use many asbestos tailings collected in Ya-Lu highway,and to explore the feasibility of using asbestos tailings as aggregates in common asphalt mixtures,and properties of some asphalt mixtures were evaluated as wel...To use many asbestos tailings collected in Ya-Lu highway,and to explore the feasibility of using asbestos tailings as aggregates in common asphalt mixtures,and properties of some asphalt mixtures were evaluated as well.X-ray diffraction （XRD）,X-ray fluorescent （XRF）,and atomic absorption spectrophotometry （AAS） were employed to determine the solid waste content of copper,zinc,lead,and cadmium.Volume properties and pavement performances of AC-25 asphalt mixture with asbestos tailings were also evaluated compared with those with basalt as aggregates.XRD and XRF measurement results infer that asbestos tailing is an excellent road material.Volume properties of AC-25 asphalt mixture with asbestos tailings satisfied the related specifications.No heavy metals and toxic pollution were detected in AAS test and the value of pH test is 8.23,which is help to the adhesion with asphalt in the asphalt concrete.When compared with basalt,high temperature property and the resistance to low temperature cracking of AC-25 asphalt mixture was improved by using asbestos tailings as aggregates.In-service AC-25 asphalt pavement with asbestos tailings also presented excellent performance and British Pendulum Number （BPN） coefficient of surface.展开更多
本文叙述了铜—镍选矿厂尾矿自然沉降和絮凝沉降规律的研究。通过标准的试验室分批沉降试验,确定了各种条件下的沉降速度。试验发现,絮凝可以显著改善沉降过程,但是其效果取决于几方面因素,例如:给入的矿浆浓度,絮凝剂的种类和用量,矿浆...本文叙述了铜—镍选矿厂尾矿自然沉降和絮凝沉降规律的研究。通过标准的试验室分批沉降试验,确定了各种条件下的沉降速度。试验发现,絮凝可以显著改善沉降过程,但是其效果取决于几方面因素,例如:给入的矿浆浓度,絮凝剂的种类和用量,矿浆 pH 值,絮凝剂与尾砂混合的程度以及在压缩期间搅拌的使用。结果表明,对于在给定条件下的沉降过程,底流矿浆浓度(P)和沉降时间(t)附合关系式:P=k·t^n,式中 k 和 n 为常数。最后叙述了利用该关系式确定浓密机尺寸的程序。展开更多
基金Funded by the Western Region Transport Development Science and Technology Program (200731800003)
文摘To use many asbestos tailings collected in Ya-Lu highway,and to explore the feasibility of using asbestos tailings as aggregates in common asphalt mixtures,and properties of some asphalt mixtures were evaluated as well.X-ray diffraction （XRD）,X-ray fluorescent （XRF）,and atomic absorption spectrophotometry （AAS） were employed to determine the solid waste content of copper,zinc,lead,and cadmium.Volume properties and pavement performances of AC-25 asphalt mixture with asbestos tailings were also evaluated compared with those with basalt as aggregates.XRD and XRF measurement results infer that asbestos tailing is an excellent road material.Volume properties of AC-25 asphalt mixture with asbestos tailings satisfied the related specifications.No heavy metals and toxic pollution were detected in AAS test and the value of pH test is 8.23,which is help to the adhesion with asphalt in the asphalt concrete.When compared with basalt,high temperature property and the resistance to low temperature cracking of AC-25 asphalt mixture was improved by using asbestos tailings as aggregates.In-service AC-25 asphalt pavement with asbestos tailings also presented excellent performance and British Pendulum Number （BPN） coefficient of surface.
文摘本文叙述了铜—镍选矿厂尾矿自然沉降和絮凝沉降规律的研究。通过标准的试验室分批沉降试验,确定了各种条件下的沉降速度。试验发现,絮凝可以显著改善沉降过程,但是其效果取决于几方面因素,例如:给入的矿浆浓度,絮凝剂的种类和用量,矿浆 pH 值,絮凝剂与尾砂混合的程度以及在压缩期间搅拌的使用。结果表明,对于在给定条件下的沉降过程,底流矿浆浓度(P)和沉降时间(t)附合关系式:P=k·t^n,式中 k 和 n 为常数。最后叙述了利用该关系式确定浓密机尺寸的程序。
