Performance Evaluation of Engineered Newark Concrete Forming Tubes for Construction Applications

在北美，数百万美元用于建造钢筋混凝土结构的模板。质量差的模板是在施工阶段生产质量差的混凝土以及随后在使用阶段由于耐久性问题而导致混凝土结构劣化的主要问题来源之一。随着用于基础设施维护、修复和更换的预算拨款的减少，显然需要高性能的混凝土建筑模板。该纽瓦克集团是一个领先的制造商的创新混凝土成型管再生纸产品在北美。 这些工程管作为模板的应用可以通过提高防水性、在浇注过程中处理大量振动/静水压力、更好的表面光洁度和增强混凝土耐久性来生产优质混凝土。通过施工和使用阶段的实验/理论研究，为新引进的纽瓦克成型管制定设计标准和性能规范是至关重要的。这项研究将涉及对纽瓦克成型管的广泛调查，以研究各个方面，如模板性能和对各种类型混凝土的短期/长期机械/耐久性性能的影响，以制定基于性能的规范。该项目的成果将有利于加拿大的工程师、建筑商和地方当局在使用纽瓦克成型管建造结构时，促进美观、耐用、绿色、高效和可持续的建筑。

Millions of dollars are spent on the formwork for construction of reinforced concrete structures in North America. The poor quality formwork is one of the major sources of problem in producing bad quality concrete in the construction stage and subsequent deterioration of concrete structures in the service stage due to durability issues. With decreasing budget allocations for infrastructure maintenance, rehabilitation, and replacement, the need for high performance formwork for concrete construction is apparent. The Newark Group is one of the leading manufacturers of innovative concrete forming tubes from recycled paper products in the North America. The application of these engineered tubes as formwork can produce quality concretes through improved water resistance, handling extensive vibration/hydrostatic pressure during casting, better surface finish and enhancing concrete durability. It is essential to produce design standards and performance based specifications for the newly introduced Newark forming tubes through experimental/theoretical investigations in the construction and service stages. This research will involve extensive investigations on the Newark forming tubes to study various aspects such as performance as formwork and influence on short/long term mechanical/durability properties of various types of concretes in order to develop performance based specifications. The outcomes of this project will benefit engineers, builders and local authorities in Canada when constructing structures with the Newark forming tubes in terms of promoting aesthetic, durable, greener, efficient and sustainable construction.