Fabric-Reinforced Cement Composites by Pultrusion: Manufacturing, Properties, and Modeling Aspects

摘要本研究旨在开发一种新的经济有效的方法来生产高性能薄片织物增强水泥复合材料。薄壁构件(厚度约为10 mm)是水泥基复合材料的主要类别，可用作墙板、外墙板、瓷砖、屋顶构件和压力管道。对于这类构件，为了改善其拉伸和弯曲性能，必须增加配筋。建议的织物-水泥系统有可能被用作结构承重构件，从而与其他板材类型的材料，如木材、合成材料或金属竞争。开发一种工业生产方法来生产带有织物的片状水泥元件不仅是技术上的挑战，而且是科学的挑战，因为事实证明，这种生产方法可以对最终产品的性能产生重大影响。在实际使用织物-水泥复合材料时，这里提出了一种工业上经济有效的生产工艺，如拉挤工艺。这项研究的主要科学目标是：1)开发织物增强水泥复合材料的拉挤工艺，2)开发具有合适流变性和最佳机械性能的水泥混合料，3)优化各种新型和改进型产品的制造材料和结构，4)发展理论方法，帮助设计者实施、商业化和使用这些材料。这项工作的智力和演绎部分将涉及两名高级人员与几名学生在一个国际水平的项目中的互动。随着能源和稀缺自然资源的日益减少，开发新的耐用、坚固、环保和经济的建筑材料的潜力是一个全球性的挑战。水泥复合材料制品中的纤维增强与拉挤工艺的结合有望带来一种有效的创新技术，以生产一种新型的高性能织物-水泥复合材料。这一突破可能会为大量新产品和应用开辟道路。它还将讨论一种改造现有钢筋混凝土结构和砖石墙的经济手段。短期目标包括开发经济的材料和制造它们的工艺。该项目的长期目标是向工程界展示一种适合21世纪的替代建筑材料。

AbstractThe research is aimed at developing a novel cost-effective method for the production ofhigh performance thin-sheet fabric-reinforced cement composites. Thin elements (about 10 mm thickness)represent a major category of cement-based composites and may be used as wall panels, exterior siding,tiles, roofing members, and pressure pipes. For such elements addition of reinforcement is essential inorder to improve the tensile and flexural performance. The proposed fabric-cement systems have thepotential to be used as structural load bearing members, thus competing with other board type materialssuch as wood, synthetics, or metals. The challenge in developing an industrial production method to producethin sheet cement elements with fabrics is not only technological, but also scientific, as it is demonstratedthat the production method can have substantial impact on the properties of the final product. Topractically use fabric-cement composites, an industrial cost-effective production process such as thepultrusion process is proposed here. The main scientific goals of this research are: 1) development of thepultrusion processing for fabric reinforced cement composites, 2) development of cement mixtures withappropriate rheology for the process, and optimal mechanical performance, and 3) optimization of fabricmaterials and structure for various new and retrofit type products, and 4) development of theoreticalapproaches to help the designers with implementation, commercialization, and use of these materials.The intellectual andeducational components of this work will involve the interaction of two senior personnel with severalstudents in a project that is addressed at an international level. The potential for developing new durable,strong, environmentally friendly, and economical, construction materials is a global challenge as we lookat the diminishing energy and scarce natural resources. The promising combination of fabricreinforcement in cement composite products and the pultrusion process is expected to lead to an effectivenovel technique to produce a new class of high performance fabric-cement composite materials. Suchbreakthrough may open the way for a multitude of new products and applications. It will also address aneconomical means of retrofitting existing reinforced concrete structures and masonry walls. The shortterm objectives include the development of economical materials and processes to manufacture them. Thelong term objective of this project is to present to the engineering community an alternative buildingmaterial fit for the 21st century.