SAFE, SUSTAINABLE AND DIGITALLY-MONITORED CONCRETE STRUCTURES FOR SMART CITIES

智慧城市是整合基础设施和服务的城市，通过智能传感器和先进的数据科学，建立一个有效的城市生态系统，整合机构，物理，社会和经济基础设施。智慧城市中的混凝土基础设施不仅必须安全和可持续，还必须集成物联网（IoT）和信息通信技术（ICT），以实现运营效率，成本效益的维护和寿命终止的可拆卸性。该提案的主要目标是为智能城市发展安全，可持续和数字监控的混凝土结构做出贡献。 这些目标不仅适用于新建筑，也适用于需要恢复其损失能力的受损结构，以及未受损但仍需要加固以抵御地震和火灾等灾害的结构。 该提案的重点是开发高度耐损伤的材料，这些材料利用纳米技术的原理来描述自我修复，智能和低碳行为，并可以使用3D打印等数字授权过程放置在结构中。在这样做的过程中，该计划努力整合材料科学，传感器和结构工程的前沿发现。 该提案集中在两个广泛的领域：第一：它旨在开发一种新型的纤维增强混凝土，称为生态韧性水泥基复合材料（EDCC），具有自我修复，耐用，低碳，耐损伤高达6%的应变。进一步提出了用纳米颗粒改性EDCC中的基体，并用亲水性和火山灰纳米涂层改性的来自废物流（如轮胎）的共挤出回收纤维增强它们。在一个应用中，提出了中空纤维作为增强材料，

Smart cities are cities that integrate infrastructureand services to produce an efficient urban eco-system that integrates institutional,physical, social and economic infrastructure through smart sensors and advanceddata-science. Concrete infrastructure in a Smart City must not only be safe andsustainable, but must also integrate Internet of Things (IoT) and Informationand Communication Technology (ICT) to achieve operational efficiency,cost-effective maintenance and end-of-life deconstructability. The primaryobjective of this proposal is to contribute towards development of safe, sustainable,and digitally-monitored concrete structures for Smart Cities. These objectives apply not only to newconstruction, but also to deteriorated structure that need to regain their lostcapacity, as well as structures that are not deteriorated but still requiresstrengthening against calamities such as earthquakes and fires. This proposal focuses on development of highlydamage-tolerant materials that utilize principles of nanotechnology to depict self-healing,smartness and low-carbon behavior and can be placed in structures using digitallyempowered processes such as 3-D printing. In doing so, the program strives to integrate cutting edgediscoveries in materials sciences, sensors and structural engineering. The proposal focuses on two broad areas: FIRST:It purports to develop a novel class of fiber reinforced concretes called Eco-FriendlyDuctile Cementitious Composites (EDCC) that are self-healing, durable, low-carbon,and damage tolerant up to 6% strain. It is further proposed to modify matricesin EDCC with nano-particles and reinforce them with co-extruded recycled fibersfrom waste streams (such as tires) modified with hydrophilic and pozzolanic nano-coatings. In one application, hollow fibers areproposed as reinforcement i