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Nano-modified Polymer Concrete: A New Material for Smart and Resilient Structures

机译:纳米改性聚合物混凝土:智能和弹性结构的新材料

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Polymer concrete (PC) is a type of concrete where polymer binder replaces cement. PC has been used in field applications since the 1950s. Specifically, PC has been widely used for precast architectural facade, underground utilities, manholes, machine foundations, bridge deck overlays and closures, and other applications. PC is characterized by high compressive and tensile strengths and superior durability compared with conventional Portland cement concrete. However, the use of PC is limited due to its relatively higher cost than conventional concrete. This paper suggests that a significant change in PC can take place by incorporating a very limited amount of nanomaterials (below 2% of carbon nanotubes or alumina nanoparticles by weight of the resin). Incorporating such small amount of nanomaterials will result in significant improvement in mechanical properties of PC including strength, ductility, and fracture toughness. We also show that incorporating 2.0 wt.% of pristine carbon nanotubes can result in significant improvement in ductility and can allow self-sensing capabilities of PC. The significance of using nanomaterials is fundamental and will open doors for using PC as a material for smart and resilient structures under extreme loadings.
机译:聚合物混凝土(PC)是一种混凝土,聚合物粘合剂取代水泥。自20世纪50年代以来,PC已被用于现场应用。具体而言,PC已广泛用于预制架构外观,地下公用设施,沙井,机器基础,桥式甲板覆盖和封闭以及其他应用。与传统的波特兰水泥混凝土相比,PC的特征在于高压压和拉伸强度和较强的耐用性。然而,由于其比传统混凝土成本相对较高,PC的使用受到限制。本文表明,通过掺入非常有限的纳米材料(低于2%的碳纳米管或氧化铝纳米粒子以重量的树脂)来进行PC的显着变化。掺入这种少量的纳米材料将导致PC的机械性能显着改善,包括强度,延展性和断裂韧性。我们还表明,掺入2.0重量%的原始碳纳米管可以导致延展性的显着改善,并且可以允许PC的自感应能力。使用纳米材料的重要性是基本的,并且将在极端载荷下使用PC作为用于智能和弹性结构的材料的门。

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