Development of engineered cementitious composite for bridge overlay

公路桥的桥面由混凝土和钢筋制成。这些甲板板有50-100毫米厚的顶部覆盖层，由普通水泥混凝土制成，通常称为普通水泥混凝土或PCC。覆盖层**用于保护桥面板的钢筋（钢筋）免受腐蚀性盐和恶劣天气的影响，也**用于提高可乘坐性。然而，由于PCC是一种脆性（不可弯曲）材料，PCC覆盖层会产生许多问题，如裂缝、分层和坑洞。这些裂缝和坑洞允许盐和其他有害化学物质和材料通过混凝土进入并腐蚀钢筋。因此，混凝土层膨胀并从桥面脱落，给车辆和乘客带来安全隐患。该项目将开发一种合适的可弯曲和耐用的混凝土材料，称为工程胶凝复合材料（ECC）。Facca公司将使用这种ECC作为桥梁覆盖层，它可以抵抗裂缝和坑洞。因此，该项目将使Facca公司比其竞争对手具有竞争优势。因此，Facca公司将找到一个真正的机会来扩大他们的业务，并可能在安大略省的温莎-埃塞克斯地区创造新的就业机会。工程预计在获批后六个月内完成。**将雇用和培训两名学生，这两名学生将执行该项目。通过这些培训，这些学生将能够减少加拿大熟练劳动力的短缺。

Road bridges have deck slabs made of concrete and steel rebar. These deck slabs have 50-100 mm thick top**overlay made of regular cement concrete which is usually called as plain cement concrete or PCC. Overlays are**used to protect steel reinforcement (rebar) of the bridge deck slab from corrosive salt and harsh weather and**also to improve rideability. However, a PCC overlay creates many problems such as cracks, delamination, and**potholes since a PCC is a brittle (non-bendable) material. These cracks and potholes allow salt and other**deleterious chemicals and materials to ingress through the concrete and corrode steel rebar. Hence, the concrete**layer swells and delaminates off the bridge deck causing safety concern to the vehicles and the passengers. This**project will develop a suitable bendable and durable concrete material known as engineered cementitious**composite (ECC). Facca Incorporated will use this ECC as the bridge overlay which will offer resistance to**cracks and potholes. Hence, the project will give Facca Incorporated a competitive edge over its competitors.**Thus, Facca Incorporated will find a real opportunity to expand their business and possibly create new jobs in**the Windsor-Essex area of Ontario. The work is scheduled to be completed in six months after its approval.**Two students will be hired and trained and these two students will execute the project. With this training, these**students will be able to reduce Canadian skilled labour shortage.