钢渣混凝土窨井盖压敏性研究

Research on Pressure Sensitivity of Steel Slag Concrete Manhole Cover

摘要:

以低碱度风淬钢渣制成钢渣混凝土试件，再采用两电极法测得钢渣混凝土的渗滤阀值.根据渗滤阀值制作了带不锈钢片电极的钢渣混凝土窨井盖,然后模拟窨井盖在实际工况下的受力情况，测试了窨井盖加载至破坏时以及在循环荷载和冲击荷载作用下电阻率的变化情况.结果表明：在不同的受力状况下窨井盖的电阻率变化是不同的，正常荷载作用下窨井盖的电阻率趋于一常数，破坏荷载作用下窨井盖电阻率急剧上升.通过测量窨井盖电阻率的变化情况，可以感知窨井盖的破坏状况，以便对其及时更换.

Abstract:

Low basicity air quench slag were collected to produce steel slag concrete, the percolation threshold of steel slag concrete were measured through two electrodes way. Steel slag concrete manhole cover which has two stainless steel electrodes were produced based on the percolation threshold, the actual force the manhole cover subjected to was simulated, the resistivity from initial loading to destroy and under cyclic loading and impact loading were measured. The results show that the change of resistivity under different force is not the same. Under normal loading condition it tends to stabilize toward a constant and it moves sharply higher under failure loading. The destroy state of steel slag concrete manhole cover could be known by measuring its resistivity.