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

仅利用废物焚烧能源和灰烬生产硅质材料，并验证其作为混凝土矿物掺合料的用途

• 批准号: 543518-2019
• 负责人: Shao, Yixin
• 金额: $ 5.1万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=720727
• 关键词: Producing; siliceous; material; exclusively; waste

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.

该合作研究与开发（CRD）项目旨在仅在相当于焚烧的温度下利用城市固体废物焚烧（MSWI）灰烬生产环保型硅质材料。如此生产的硅质材料将用作矿物掺合料，部分替代混凝土中的波特兰水泥，并提高性能和耐久性。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”的成功完成基础上，该项目展示了在相当于焚烧的温度下利用城市生活垃圾焚烧灰烬合成生态水泥的可行方法。这些令人鼓舞的结果值得对生态水泥的实际市场用途进行调查。作为混凝土中潜在的独立粘合剂，生态水泥需要碳化活化，这是一种仍处于开发阶段的固化技术。此外，生态水泥仅适用于干浇产品，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水泥质或火山灰性质，因此适合考虑作为矿物掺合料来部分替代所有类型混凝土中的水泥。这条路线展示了更大的份额和更容易的市场路径。它非常适用于粉煤灰和高炉矿渣等矿物掺合料。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混合物提供了机会。这样的应用将把改性生态水泥的用途扩大到整个混凝土市场。焚烧炉可能是自生的，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，焚烧炉变成了替代的混合物供应商，从而创造了新的收入来源，并且还受益于将危险灰烬从垃圾填埋场转移并消除相关的倾倒费成本。该项目将重点关注硅质混合物的新颖配方。验证将包括针对标准合规性、环境稳定性和长期耐久性能的全面材料测试。