Producing a siliceous material exclusively from waste incineration energy and ashes and validating its use as a mineral admixture for concrete

该合作研究与开发（CRD）项目旨在生产一种生态友好型硅质材料，完全来自城市固体废物焚烧（MSWI）灰烬，温度相当于焚烧温度。如此生产的硅质材料将用作矿物掺合料，以部分取代混凝土中的波特兰水泥，并改善性能和耐久性。该项目建立在NSERC战略项目“将城市固体废物焚烧转化为生态砖生产”的成功完成的基础上，该项目展示了在焚烧等效温度下从垃圾焚烧厂灰烬合成生态水泥的可行性。有希望的结果值得调查生态水泥的真实的市场用途。作为混凝土中潜在的独立粘合剂，生态水泥需要碳化活化，这是一种仍处于发展阶段的固化技术。此外，生态水泥仅适用于干铸产品，仅占混凝土市场总量的15%。或者，当比例不同时，生态水泥可以表现出胶凝或火山灰行为，因此适合作为矿物掺合料考虑在所有类型的混凝土中部分取代水泥。这条路线展示了更大的市场份额和更容易的市场路径。对于粉煤灰和高炉矿渣等矿物掺合料来说，这一点已经很好地确立。事实上，近年来优质粉煤灰一直短缺，这为探索本研究的生态掺合料提供了机会。这种应用将把改性生态水泥的用途扩大到整个混凝土市场。焚化炉可能是自生的，其中硅质生态混合物是利用产生的热量和灰渣在当地生产的。在这种情况下，焚化炉变成了替代的混合物供应商，从而创造了新的收入来源，并从垃圾填埋场转移危险灰烬和消除相关的倾倒费成本中受益。该项目将集中在硅质外加剂的新配方。验证将包括针对标准合规性、环境稳定性和长期耐久性性能的全面材料测试。

This Collaborative Research and Development (CRD) project aims to produce an eco-friendly siliceous material exclusively from municipal solid waste incineration (MSWI) ashes at incineration-equivalent temperatures. The siliceous material so produced will be used as a mineral admixture to partially replace Portland cement in concrete and lend improvements to performance and durability. This project builds on the successful completion of NSERC strategic project, "turning municipal solid waste incineration into eco-bricks production", which demonstrated the viable synthesis of eco-cement from MSWI ashes at incineration-equivalent temperatures. The promising results warrant investigating real market uses for eco-cement. As a potential standalone binder in concrete, eco-cement requires carbonation activation, a curing technique that is still in its developmental stages. In addition, eco-cement is only applicable to dry-cast products, which represent only 15% of the total concrete market. Alternatively, when proportioned differently, eco-cement can be made to display cementitious or pozzolanic behavior and, therefore suited for consideration as a mineral admixture to partially replace cement in all types of concrete. This route demonstrates a larger share and easier path to market. It is well established for mineral admixtures such as coal fly ash and blast furnace slag. In fact, there has been a shortage in quality fly ash in recent years, presenting an opportunity to explore this study's eco-admixture. Such an application would expand the modified eco-cement's use to the entire concrete market. An incinerator could possibly be made autogenous, where the siliceous eco-admixture is produced locally using generated heat and ash residues. In such a scenario, an incinerator is turned into an alternative admixture supplier, thus creating a new revenue stream, and additionally benefiting from diverting hazardous ash from landfills and eliminating associated tipping fee costs. The project will focus on the novel formulation of a siliceous admixture. Validation will include comprehensive material testing specific to standards compliances, environmental stability, and long-term durability performance.