High-performance Nano-Modified Cementitious Composites Comprising Multi-Scale Fibres for Concrete Flatwork

混凝土平台（如人行道、桥面）基础设施是加拿大城市经济持续增长的重要组成部分。Performance BioFilaments（BF，加拿大纳米原纤化纤维素[NFC]生产商）和温尼伯市（COW;市政当局/最终用户）正在与马尼托巴大学（UM）合作，以提高混凝土平台基础设施的性能并延长使用寿命，最大限度地减少维修周期并降低生命周期成本。该项目的具体目标是开发创新的高性能纤维增强水泥基复合材料（FRCC），包括大量矿渣（工业废料副产品），生物基纳米材料（NFC，纳米结晶纤维素：NCC）和新型纤维（玄武岩纤维颗粒：BFP）。该项目将提供有关FRCC的机械性能和耐久性的基本数据，以及其与路面和桥梁中使用的混凝土的兼容性。这是必要的资格，这些新的复合材料作为一个覆盖或修复系统，在未来的实地研究，混凝土平台（长期目标）。NFC作为纳米增强材料的成功可能会为BF在加拿大和其他地方的高性能FRCC市场创造额外的商机。拟议项目将增加使用加拿大产品（矿渣/纳米材料/纤维）生产特种混凝土的信心。该项目之后将由COW与UM，BF，混凝土生产商，咨询公司和承包商协调进行现场示范试验，以促进技术向建筑部门的转让。随着通过国家讲习班/会议更广泛地传播知识，这一举措将通过鼓励在重要的运输基础设施中更多地采用新型、高性能和成本效益高的建筑材料，对加拿大基础设施的可持续发展产生积极影响。

Concrete flatwork (e.g. pavements, bridge decks) infrastructure is an essential component for continued economic growth of Canadian cities. Performance BioFilaments (BF, Canadian producer for nano-fibrillated cellulose [NFC]) and City of Winnipeg (COW; municipality/end user) are collaborating with the University of Manitoba (UM) to improve the performance of concrete flatwork infrastructure and extend service life, minimize cycles of repair and reduce life-cycle costs. The specific objective of the project is to develop innovative high-performance fiber reinforced cementitious composites (FRCC) comprising high-volume slag (industrial waste by-product), bio-based nanomaterials (NFC, nano-crystalline cellulose: NCC) and novel fibers (basalt fiber pellets: BFP). The project will provide fundamental data on the mechanical properties and durability of FRCC, as well as its compatibility with concrete used in pavements and bridges. This is needed to qualify these novel composites for use as an overlay or repair system in future field studies for concrete flatwork (long-term objective). Success of NFC as nano-reinforcement may create additional business opportunities for BF in the market of high-performance FRCC in Canada and elsewhere. The proposed project will increase confidence in using Canadian products (slag/nanomaterials/fibers) to produce specialty concrete. The project will be followed by field demonstration trials coordinated by COW with UM, BF, concrete producers, consulting firms and contractors to facilitate technology transfer to the construction sector. With wider dissemination of knowledge through national workshops/conferences, this initiative will reflect positively on the sustainable development of Canadian infrastructure by encouraging more implementation of novel, high-performance and cost-efficient building materials in vital transportation infrastructure.