Sustainable recycled wood ash-based mortar and concrete from production to large-scale application

可持续再生木灰砂浆和混凝土从生产到大规模应用

• 批准号: 557333-2020
• 负责人: Alam, Shahria
• 金额: $ 2.62万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Alliance 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=721664
• 关键词: Sustainable; recycled; wood; ash; based

The production of green thermal energy from timber biomass products, commonly known as Bioenergy, is growing in demand not only in Canada but also worldwide. However, a major problem arising from burning woody biomass is the substantial amount of ash that is being produced as a by-product, which usually ends up in landfills. Tolko co-generation facilities in Armstrong, British Columbia, produces about 20 Tonnes of boiler ash per day as their by-product. If not managed properly, the disposal of such a significant amount of wood ash may result in serious environmental and health problems. Thus, it is crucial to find a sustainable solution to this waste disposal.This research aims to discover ways to produce environment-friendly and sustainable concrete in addition to addressing the problems associated with this wood ash disposal. This project will investigate the prospects of utilizing wood ash - both fly ash and bottom ash, as partial replacements for cement in concrete in terms of both mechanical and durability properties. The proposed study will render a thorough characterization of the wood ash by Tolko, mechanical properties of mortar and concrete made partly of wood ash at different replacement levels, and durability of concrete with wood ash at optimized replacement levels. The optimized concrete mixtures will be implemented in the M & K Ready Mix compound, applied in a real-life project in collaboration with Fawdry Homes, and carefully monitored to assess their short and long-term performance. Canada does not have a standard guideline on the use of wood ash in the production of concrete yet. A limited number of guidelines/practices for such use of wood ash have been developed globally. Research results from this project will be presented during the technical committee meetings of Canadian Standards Association (CSA A23.1) and American Concrete Institute (ACI) 555 Concrete with Recycled Materials (ACI 555) committee to get their feedback and endorsement to incorporate the mix designs in CSA and ACI codes.

利用木材生物质产品生产绿色热能（通常称为生物能源）不仅在加拿大而且在全世界的需求都在增长。然而，燃烧木质生物质产生的一个主要问题是作为副产品产生大量灰烬，这些灰烬通常最终被填埋。位于不列颠哥伦比亚省阿姆斯特朗的 Tolko 热电联产设施每天产生约 20 吨锅炉灰渣作为副产品。如果管理不当，处理如此大量的木灰可能会导致严重的环境和健康问题。因此，找到这种废物处理的可持续解决方案至关重要。本研究除了解决与木灰处理相关的问题外，还旨在探索生产环境友好型和可持续混凝土的方法。该项目将研究利用木灰（粉煤灰和底灰）作为混凝土中水泥的部分替代品的机械和耐久性能的前景。拟议的研究将通过 Tolko 全面表征木灰、部分由木灰制成的砂浆和混凝土在不同替代水平下的机械性能，以及木灰混凝土在优化替代水平下的耐久性。优化后的混凝土混合物将在 M & K Ready Mix 混料中实施，与 Fawdry Homes 合作应用于现实项目中，并仔细监控以评估其短期和长期性能。加拿大尚无关于在混凝土生产中使用木灰的标准指南。全球范围内已经制定了数量有限的木灰使用指南/实践。该项目的研究结果将在加拿大标准协会 (CSA A23.1) 和美国混凝土协会 (ACI) 555 再生材料混凝土 (ACI 555) 委员会的技术委员会会议上提交，以获得他们的反馈和认可以纳入该混合物采用 CSA 和 ACI 规范进行设计。