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Composites with Inorganic Matrix for Repair of Concrete and Masonry Structures 混凝土和砌体结构修复用无机基质复合材料
发布日期: 2018-05-01
本SP是2017年在密歇根州底特律举行的ACI春季大会期间举行的两次技术会议的成果。通过介绍和收集论文,发起委员会(ACI委员会549和562以及Rilem TC 250)打算提请技术界注意混凝土和砌体结构新型修复/加固材料的进展。这些材料的特点是由水力或石灰基粘合剂制成的胶结基质,以一种或多种织物(也称为纺织品)的形式嵌入加固物。织物结构的巨大变化(例如,横截面积、股间距和有机树脂浸渍纤维)与所用材料类型(芳纶、玄武岩、碳、玻璃、聚对苯撑苯并双恶唑(PBO)和涂层超滤膜)相结合- 高强度钢)使得这些系统的表征、验证和设计相当具有挑战性。无论钢筋类型(合成钢或超高强度钢)如何,浸渍砂浆均采用抹子或喷射法。还应注意的是,织物增强水泥基和钢骨水泥浆与其他修复技术(如FRC(纤维增强混凝土)和UHPC(超高性能混凝土))有很大不同,因为它们使用连续和定向钢筋。在某种意义上,FRCM和SRG可以被视为钢丝网水泥的现代演变。
This SP is the result of two technical sessions held during the 2017 ACI Spring Convention in Detroit, MI. Via presentations and the resulting collection of papers, it was the intention of the sponsoring committees (ACI Committees 549 and 562 together with Rilem TC 250) to bring to the attention of the technical community the progress being made on a new class of repair/strengthening materials for concrete and masonry structures. These materials are characterized by a cementitious matrix made of hydraulic or lime-based binders, which embeds reinforcement in the form of one or more fabrics also known as textiles. The great variability of fabric architectures (for example, cross sectional area, strand spacing, and fiber impregnation with organic resin) coupled with the types of material used (aramid, basalt, carbon, glass, polyparaphenylene benzobisoxazole (PBO) and coated ultra-high strength steel) makes the characterization, validation, and design of these systems rather challenging. Irrespective of the reinforcement type (synthetic or ultra-high strength steel), the impregnating mortar is applied by trowel or spray-up. It should also be noted that fabric reinforced cementitious matrix and steel reinforced grout, in particular, are very different from other repair technologies such as FRC (fiber reinforced concrete) and UHPC (Ultra High-Performance Concrete) in that they utilize continuous and oriented reinforcement. In a sense FRCM and SRG can be viewed as the modern evolution of ferrocement.
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发布单位或类别: 美国-美国混凝土学会
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