Development of carbon-neutral, multiphase composite coatings (MCC) and their robotic placement technologies for corrosion protection and rehabilitation of sewer systems

开发碳中性、多相复合涂层 (MCC) 及其机器人放置技术，用于下水道系统的腐蚀防护和修复

• 批准号: 571076-2021
• 负责人: Banthia, NemkumarNP
• 金额: $ 15.74万
• 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: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749175
• 关键词: Development; carbon; neutral; multiphase; composite

Sewerage is the civic infrastructure that transports sewage using concrete sewer pipes. Thousands of such sewerage pipe segments are replaced prematurely because of severe bio-corrosion caused by a prolonged exposure of concrete to highly corrosive, bacteria-laden, sewer environments. Maintaining and repairing aged and deteriorated sewerage infrastructure is an ongoing challenge for many municipalities and regional utilities, including Metro Vancouver. This is further complicated by the fact that aging sewerage infrastructure is often located under crowded urban areas, necessitating careful planning for assessment, repair, and replacement. With rapidly aging civic infrastructure in Canada, this problem is expected to only get worse. The applicants have recently developed, tested and patented a low-carbon, Multiphase Composite Coating (MCC) which when applied as a coating prevents bio-corrosion in sewer pipes. MCC is based on a modified geopolymer matrix of alumina silicate and magnesium phosphate with antibacterial agents encapsulated in it. The CO2 equivalent emissions from the MCC are estimated to be 65%-85% less than that of traditional Portland cement mortars. The coating has already been hand-applied to a sewerage chamber in Vancouver. Here, it is proposed to improve the MCC by further reducing its carbon footprint by using CO2 sequestered recycled sand, employing natural biocides and reinforcing it with recycled fiber. Rheology will be studied so MCC can be spray applied using robotics based on Artificial Intelligence (AI). Modified MCC will be spray applied on Metro Vancouver's assets using sensors to monitor performance. The Multiphase Composite Coating (MCC) will not only be useful as a spray-applied liner for the rehabilitation of existing pipes, manholes and chambers, but also for new precast pipes and manholes. Full-scale trials with Metro Vancouver will help improve the MCC technology and reduce both materials and placement costs. The project will provide the two private companies a major competitive edge in the burgeoning international infrastructure rehab market.

下水道是一种公民基础设施，使用混凝土下水道管运输污水。由于混凝土长期暴露于高度腐蚀性，富含细菌的下水道环境而导致的严重生物腐蚀导致了数以千计的下水道管段。对于许多市政当局和地区公用事业（包括温哥华），维持和维修老化和恶化的下水道基础设施是一个持续的挑战。衰老的下水道基础设施通常位于拥挤的城市地区，因此需要仔细的评估，维修和更换的计划，这更加复杂。 随着加拿大公民基础设施的快速老化，预计这个问题只会变得更糟。申请人最近开发，测试和申请了低碳，多相复合涂料（MCC），当用作涂层时，该涂层可防止下水道管中的生物腐蚀。 MCC基于氧化铝硅酸盐和磷酸镁的修饰地球聚合物基质，其抗菌剂封装在其中。 MCC的CO2当量排放估计比传统的波特兰水泥砂浆低65％-85％。该涂层已经被手工施加到温哥华的一个下水道室。 在这里，提议通过使用二氧化碳隔离的回收砂，采用天然杀菌剂并用再生纤维加固，以进一步降低其碳足迹来改善MCC。将研究流动性，以便可以使用基于人工智能（AI）的机器人技术来喷涂MCC。修改后的MCC将使用传感器在温哥华地铁的资产上喷涂以监视性能。多相复合涂料（MCC）不仅可以作为用于恢复现有管道，人孔和腔室的喷雾衬里，而且还可以用于新的预制管道和人孔。与大温哥华大都会的全面试验将有助于提高MCC技术并降低材料和放置成本。该项目将为两家私人公司提供新兴的国际基础设施康复市场的主要竞争优势。