The study on effective utilization of the construction waste sludge to road material by lime stabilization in cold region

建筑垃圾污泥是建筑工程垃圾处理中有效利用率较低的废弃物之一。虽然提出了各种应用方法，但由于利用率小或价格昂贵，目前仍处于低利用率的状态，如路堤材料。为了利用石灰作为路面冻层等增值材料，研究了石灰的稳定特性。一般采用的石灰稳定法是在立即加入石灰后通过压实来改善养护的方法（称为后续压实养护）。然而，我们使用的方法是压实，因为它是离开和任何天的进展后，石灰被混合（离开养护）。通过这种方法，由于稳定土的储存是可能的，因此固定式装置的处理成为可能，并有望有效利用更多的建筑污泥。然后，对改变养护方法的稳定土进行无侧限压缩试验和冻胀试验，得到如下结果：1)无侧限抗压强度随养护天数成比例增加，其中石灰掺量为7%、养护天数为7时增加比例最显著。2)在无侧限抗压强度与养护天数的关系中，当养护天数较短时，无侧限抗压强度之间不存在差异。但随着休假养护天数的延长，随着休假7天的高峰，无侧限抗压强度发生了变化。在第90次养护时，无侧限抗压强度下降明显。3)变形模量随养护天数成比例增大。无侧限抗压强度与变形模量的关系中，变形模量随初始含水量的增加而增大，但与龄期无关。4)冻胀量随石灰掺量的增加和养护天数的延长而减小。压实养护对这一效应的影响显著地表现在叶片养护上。这是因为叶片固化时毛细力的减小是显著的。少

The construction waste sludge is one of the waste material in which the proportion of the effective utilization is low even in the inside of waste disposal at construction. Though various application methods are proposed, by that there are small volumes of utilization or expensiveness, it is present state to remain the lower utilization such as embankment materials.In order to utilize as added value material such as the frost blanket of the road, we investigated the characteristics of lime stabilization.Generally used lime stabilization is the method which improves curing by compacting after addition of lime immediately (called the following compaction curing). However, we used the method for compacting in as it is leave and after any days progress, after the lime was mixed (leave curing ). By this method, since to stock the stabilized soil is possible, the processing becomes possible by the stationary type plant, and it is expected that the effective utilization of the construction wa … More ste sludge.Then, in carrying out unconfined compression test and frost heave test of the stabilized soil which changed the curing method, we obtained following result.1) The unconfined compressive strength increases in proportion to the curing days, and increasing proportion in case of addition of lime rate 7% and 7 leave curing days is the most remarkable.2) In the relation between unconfined compressive strength and leave curing days, the difference between the unconfined compressive strength is not observed, when the curing days is short. But as a long of the leave curing days, with the peak 7 leave days seventh change unconfined compressive strength. In the 90th curing, the lowering of the unconfined compressive strength is remarkable.3) The modulos of deformation increases in proportion to the curing days. In the relationship between unconfined compressive strength and modulos of deformation, modulos of deformation is bigger as initial water content is increase, but it is no relation with the leave curing days.4) The frost-heaving quantity decreases with increase of the addition of lime rate and extension of the curing days. The leave curing remarkably appeared on this effect from the compaction curing. This is because it is remarkable the decrease of the capillary force of the leave curing. Less