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垃圾处理中有效利用比例较低的废弃物之一。虽然提出了各种应用方法，但由于使用量小或价格昂贵，目前的状况是保持较低的使用率，如路堤材料。为了作为附加值材料使用，如道路的防冻毯，研究了石灰稳定剂的特性，一般采用的石灰稳定剂是在加入石灰后立即压实以改善养护的方法（以下称为压实固化）。然而，我们使用的方法压实，因为它是离开后，任何天的进展，石灰混合后（离开固化）。通过这种方法，由于可以储存稳定土，因此可以通过固定式设备进行处理，并且可以期望有效地利用建筑材料。 ...更多信息 然后，对改变养护方式的固化土进行无侧限抗压试验和冻胀试验，得到如下结果：1）固化土的无侧限抗压强度随养护天数的增加而增加，在石灰添加量为7%、养护期为7天的情况下，提高比例最为合理。在无侧限抗压强度与养护龄期的关系中，当养护龄期较短时，无侧限抗压强度没有明显差异。但随着养护龄期的延长，无侧限抗压强度随养护龄期的增加而增大，峰值出现在养护龄期的第7天。养护90天后，无侧限抗压强度下降明显。3）变形模量与养护天数成正比增加。在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大而增大，但与养护龄期无关。4）随着掺灰率的增大和养护龄期的延长，混凝土的冻胀量减小。压实养护对叶养的影响显著。这是因为叶固化的毛细管力的降低是显著的。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