Liu Jie, Lv Chun
College of Light-Industry and Textile Engineering, Qiqihar University, Qiqihar 161006, China.
Engineering Research Center for Hemp and Product in Cold Region of Ministry of Education, Qiqihar University, Qiqihar 161006, China.
Polymers (Basel). 2022 Mar 24;14(7):1315. doi: 10.3390/polym14071315.
The engineering applications and related research of fiber-reinforced cement and geopolymer mortar composites are becoming more and more extensive. These reinforced fibers include not only traditional steel fibers and carbon fibers, but also synthetic polymer fibers and natural polymer fibers. Polymer fiber has good mechanical properties, good bonding performance with cement and geopolymer mortars, and excellent performance of cracking resistance and reinforcement. In this paper, representative organic synthetic polymer fibers, such as polypropylene, polyethylene and polyvinyl alcohol, are selected to explore their effects on the flow properties, thixotropic properties and printing time interval of fresh 3D-printed cement and geopolymer mortars. At the same time, the influence of mechanical properties, such as the compressive strength, flexural strength and interlaminar bonding strength of 3D-printed cement and geopolymer mortars after hardening, is also analyzed. Finally, the effect of polymer fiber on the anisotropy of 3D-printed mortars is summarized briefly. The existing problems of 3D-printed cement and polymer mortars are summarized, and the development trend of polymer fiber reinforced 3D-printed mortars is prospected.
纤维增强水泥与地质聚合物砂浆复合材料的工程应用及相关研究正变得越来越广泛。这些增强纤维不仅包括传统的钢纤维和碳纤维，还包括合成聚合物纤维和天然聚合物纤维。聚合物纤维具有良好的力学性能、与水泥和地质聚合物砂浆良好的粘结性能以及优异的抗裂和增强性能。本文选取了具有代表性的有机合成聚合物纤维，如聚丙烯、聚乙烯和聚乙烯醇，来探究它们对新鲜3D打印水泥和地质聚合物砂浆的流动性能、触变性能及打印时间间隔的影响。同时，还分析了硬化后3D打印水泥和地质聚合物砂浆的力学性能，如抗压强度、抗折强度和层间粘结强度的影响。最后，简要总结了聚合物纤维对3D打印砂浆各向异性的影响。总结了3D打印水泥和聚合物砂浆存在的问题，并展望了聚合物纤维增强3D打印砂浆的发展趋势。
