Department of Materials Engineering and Chemistry, Czech Technical University in Prague, Praha, Czech Republic.
Waste Manag Res. 2012 Oct;30(10):1041-8. doi: 10.1177/0734242X12448513. Epub 2012 Jun 7.
Fly ashes generated by power and heating plants are commonly used in the production of building materials in some countries, mainly as partial replacement of cement or aggregates in concrete. The ashes from municipal solid waste incinerators can be applied in a similar way. However, their chemical and mineralogical composition, granulometry and toxic constituents have to be taken into account. In this paper, four types of municipal solid waste incinerator (MSWI) ashes produced by the modern MSWI facility in Liberec, Czech Republic, were investigated. The relationship between the particular ash properties (morphology, chemical composition) and its separation temperature in the incinerator line is discussed. A coal fly ash (class F) is characterized as well, for a comparison because its utilization in building industry is more developed. The studied MSWI ashes exhibit high concentration of chlorides and sulfates which is an unfavourable feature for a potential concrete admixture. On the other hand, three of four ashes are found to be pozzolanic active and certain hydration reactions are indicated.
发电和供热厂产生的粉煤灰在一些国家常用于建筑材料的生产，主要作为混凝土中水泥或集料的部分替代物。城市垃圾焚烧炉的灰烬也可以以类似的方式应用。然而，必须考虑它们的化学和矿物组成、粒度和有毒成分。本文研究了捷克利贝雷茨现代垃圾焚烧厂产生的四种类型的城市垃圾焚烧炉（MSWI）灰烬。讨论了特定灰烬特性（形态、化学成分）与其在焚烧炉线中分离温度之间的关系。还对一种煤飞灰（类 F）进行了特征描述，因为其在建筑行业中的应用更为发达。研究中的 MSWI 灰烬表现出高浓度的氯化物和硫酸盐，这对于潜在的混凝土外加剂来说是不利的特征。另一方面，四种灰烬中的三种被发现具有火山灰活性，并且表明存在某些水合反应。
