Becquart Frederic, Bernard Fabrice, Abriak Nor Edine, Zentar Rachid
Ecole des Mines de Douai, Département Génie Civil and Environnemental, 59508 Douai Cedex, France.
Waste Manag. 2009 Apr;29(4):1320-9. doi: 10.1016/j.wasman.2008.08.019. Epub 2008 Oct 31.
Municipal solid waste incineration (MSWI) bottom ash is an atypical granular material because it may include industrial by-products that result from the incineration of domestic waste. The prospects for the beneficial use of this particular material mainly lie in the field of road construction, as a substitute for the traditional natural aggregates. However, its mechanical properties are still little known, particularly in term of stiffness and deformability, characteristics that are essential to the construction of a durable roadway. The purpose of this paper is to describe better the mechanical behaviour of this recycled material. In order to reach this objective, a large experimental campaign is presented. The first part of this paper presents and comments in detail on the results obtained from static monotonic tests. Oedometric and triaxial shear tests were performed on MSWI bottom ash both before and after treatment with a specific hydraulic binder. These tests allow specification of the mechanical characteristics of the MSWI bottom ash, such as the initial Young's modulus, Poisson's ratio, the compressibility index, the friction angle, and the contracting or dilating behaviour of the material. The results reveal a mechanical behaviour similar to that of initially dense standard materials (sands, unbound granular materials) and a dependence on the applied average pressure, characteristic of the mechanical behaviour of granular media. More laboratory data on other samples of MSWI bottom ash are required to ensure that this comparison is statistically valid.
城市固体废弃物焚烧（MSWI）底灰是一种非典型粒料，因为它可能包含生活垃圾焚烧产生的工业副产品。这种特殊材料的有益利用前景主要在于道路建设领域，可作为传统天然集料的替代品。然而，其力学性能仍鲜为人知，尤其是在刚度和可变形性方面，而这些特性对于建造耐用道路至关重要。本文旨在更好地描述这种再生材料的力学行为。为实现这一目标，开展了大量实验。本文第一部分详细介绍并评论了静态单调试验所得结果。对经特定水硬性粘结剂处理前后的MSWI底灰进行了侧限压缩试验和三轴剪切试验。这些试验能够确定MSWI底灰的力学特性，如初始杨氏模量、泊松比、压缩指数、摩擦角以及材料的收缩或膨胀行为。结果表明，其力学行为与初始密实的标准材料（砂、无结合料粒料）相似，且依赖于所施加的平均压力，这是粒料介质力学行为的特征。需要更多关于MSWI底灰其他样本的实验室数据，以确保这种比较在统计上是有效的。
