Malaiškienė Jurgita, Spudulis Edmundas, Stonys Rimvydas
Laboratory of Composite Materials, Faculty of Civil Engineering, Institute of Building Materials, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania.
Materials (Basel). 2023 Mar 22;16(6):2528. doi: 10.3390/ma16062528.
Large amounts of municipal solid waste incineration bottom ash (MSWI BA) are formed worldwide, and this quantity is growing because of the establishment of new waste-to-energy plants. This waste is generally kept in landfills but can be used for the manufacturing of cementitious building materials. This article analyzes the use of MSWI BA as a microfiller in cement mortars. The effects of MSWI BA on the properties of cement binder and mortar were analyzed by using them separately or in combination with other microfillers: milled quartz sand, metakaolin, milled glass, and microsilica. This article investigates the flowability of cement-based mixtures, the volume change as a result of the evolution of hydrogen gas, cement hydration, XRD, TG, the physical and mechanical properties of the mortar samples, and leaching. The addition of milled MSWI BA in cement mortars was found to significantly increase slump flow; therefore, MSWI BA can be used as a microfiller. The addition of metakaolin changed the kinetics of H, which evolved due to the reaction between Al and alkali, and had a positive effect on the mechanical properties of cement mortar.
全球产生了大量城市固体废弃物焚烧底灰（MSWI BA），并且由于新建垃圾焚烧发电厂，这一数量还在不断增加。这种废弃物通常被填埋，但可用于制造水泥基建筑材料。本文分析了MSWI BA作为水泥砂浆微填料的用途。通过单独使用MSWI BA或将其与其他微填料（磨碎石英砂、偏高岭土、磨碎玻璃和微硅粉）结合使用，分析了其对水泥基粘结剂和砂浆性能的影响。本文研究了水泥基混合物的流动性、氢气逸出导致的体积变化、水泥水化、X射线衍射（XRD）、热重分析（TG）、砂浆样品的物理和力学性能以及浸出情况。研究发现，在水泥砂浆中添加磨碎的MSWI BA可显著增加坍落度；因此，MSWI BA可用作微填料。偏高岭土的添加改变了由于铝与碱反应而产生氢气的动力学，并对水泥砂浆的力学性能产生了积极影响。
