Thomas Marta, Osińska Małgorzata, Ślosarczyk Agnieszka
Faculty of Civil and Transport Engineering, Institute of Building Engineering, Poznan University of Technology, 60-965 Poznań, Poland.
Faculty of Chemical Technology, Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, 60-965 Poznań, Poland.
Materials (Basel). 2022 Jan 27;15(3):1001. doi: 10.3390/ma15031001.
Limitations in natural aggregate resources and the continuous increase in the demand for concrete as a building material, as well as the increase in the production of waste and the problem with its storage were the reasons for attempts to replace the sand fraction in cement matrices with a corresponding slag fraction. Municipal solid waste incineration (MSWI) slag, which is a product of waste incineration, can be used as an aggregate. This extends its service life and reduces landfill waste. Therefore, three types of cement mortars with different aggregate composition were prepared. In addition, to increase the durability of the cement matrix and the degree of immobilization of harmful heavy metals and salts present in the slag, a natural zeolite with pozzolanic properties was used. A set of tests was carried out on fresh mortar and hardened mortar, including strength tests after 7, 28 and 360 days. What is more, chemical tests were undertaken, including the content of chlorides and sulfates, leaching using the TCLP method and oxide composition. The conducted tests revealed that all mortars had similar strength properties and demonstrated the effectiveness of immobilizing harmful substances contained in the municipal solid waste incineration (MSWI) slag by cementing.
天然骨料资源的限制、作为建筑材料的混凝土需求的持续增长、废弃物产量的增加及其储存问题，是尝试用相应的矿渣部分替代水泥基体中砂部分的原因。城市固体废物焚烧（MSWI）炉渣作为废弃物焚烧的产物，可作为骨料使用。这延长了其使用寿命并减少了填埋废弃物。因此，制备了三种具有不同骨料组成的水泥砂浆。此外，为了提高水泥基体的耐久性以及炉渣中有害重金属和盐分的固定程度，使用了具有火山灰特性的天然沸石。对新拌砂浆和硬化砂浆进行了一系列试验，包括7天、28天和360天后的强度试验。此外，还进行了化学试验，包括氯化物和硫酸盐含量、采用TCLP法的浸出试验以及氧化物组成分析。所进行的试验表明，所有砂浆具有相似的强度性能，并证明了通过胶结固定城市固体废物焚烧（MSWI）炉渣中有害物质的有效性。
