Guo Guoliang, Lv Chun, Liu Jie, Wang Li
College of Architecture and Civil Engineering, Qiqihar University, Qiqihar 161006, China.
College of Light-Industry and Textile Engineering, Qiqihar University, Qiqihar 161006, China.
Polymers (Basel). 2022 Aug 16;14(16):3333. doi: 10.3390/polym14163333.
Geopolymers have the advantages of low carbon, being environmentally friendly and low price, which matches the development direction of building materials. Common geopolymer materials are also known as two-part geopolymers (TPGs). TPGs are usually prepared from two main substances, which are formed by polymerization of a silicoaluminate precursor and an alkaline activator solution. The TPG has many limitations in engineering application because of its preparation on the construction site, and the use of solid alkaline activator in one-part geopolymers (OPGs) overcomes this shortcoming. However, the brittleness of OPGs such as ceramics also hinders its popularization and application. The properties of the new OPG can be improved effectively by toughening and strengthening it with fibers. This review discusses the current studies of fiber-reinforced one-part geopolymers (FOPGs) in terms of raw precursors, activators, fibers, physical properties and curing mechanisms. In this paper, the effects of the commonly used reinforcement fibers, including polyvinyl alcohol (PVA) fiber, polypropylene (PP) fiber, polyethylene (PE) fiber, basalt fiber and other composite fibers, on the fresh-mixing properties and mechanical properties of the OPGs are summarized. The performance and toughening mechanism of FOPGs are summarized, and the workability, macroscopic mechanical properties and durability of FOPGs are investigated. Finally, the development and engineering application prospect of FOPGs are prospected.
地质聚合物具有低碳、环保和价格低廉的优点，这与建筑材料的发展方向相契合。常见的地质聚合物材料也被称为双组分地质聚合物（TPG）。TPG通常由两种主要物质制备而成，这两种物质是由硅铝酸盐前驱体和碱性活化剂溶液聚合形成的。由于TPG是在施工现场制备的，其在工程应用中有许多局限性，而单组分地质聚合物（OPG）中使用固体碱性活化剂克服了这一缺点。然而，OPG如陶瓷的脆性也阻碍了其推广应用。通过用纤维对新型OPG进行增韧和增强，可以有效改善其性能。本综述从原料前驱体、活化剂、纤维、物理性能和固化机理等方面讨论了纤维增强单组分地质聚合物（FOPG）的当前研究。本文总结了常用增强纤维，包括聚乙烯醇（PVA）纤维、聚丙烯（PP）纤维、聚乙烯（PE）纤维、玄武岩纤维和其他复合纤维，对OPG的新拌性能和力学性能的影响。总结了FOPG的性能和增韧机理，并研究了FOPG的工作性能、宏观力学性能和耐久性。最后，展望了FOPG的发展及工程应用前景。
