Ozdemir Huseyin, Bilisik Kadir
Vocational School of Technical Sciences, Gaziantep University, 27310 Sehitkamil-Gaziantep, Turkey.
Nano/Micro Fiber Preform Design and Composite Laboratory, Department of Textile Engineering, Faculty of Engineering, Erciyes University, 38039 Talas-Kayseri, Turkey.
Materials (Basel). 2021 May 21;14(11):2713. doi: 10.3390/ma14112713.
Multiaxis three-dimensional (3D) continuous basalt fiber/cementitious concretes were manufactured. The novelty of the study was that the non-interlace preform structures were multiaxially created by placing all continious filamentary bundles in the in-plane direction of the preform via developed flat winding-molding method to improve the fracture toughness of the concrete composite. Principle and off-axis flexural properties of multiaxis three-dimensional (3D) continuous basalt fiber/cementitious concretes were experimentally studied. It was identified that the principle and off-axis flexural load-bearing, flexural strength and the toughness properties of the multiaxis 3D basalt concrete were extraordinarily affected by the continuous basalt filament bundle orientations and placement in the pristine concrete. The principle and off-axis flexural strength and energy absorption performance of the uniaxial (B-1D-(0°)), biaxial ((B-2D-(0°), B-2D-(90°) and B-2D-(+45°)), and multiaxial (B-4D-(0°), B-4D-(+45°) and B-4D-(-45°)) concrete composites were considerably greater compared to those of pristine concrete. Fractured four directional basalt concretes had regional breakages of the brittle cementitious matrix and broom-like damage features on the filaments, fiber-matrix debonding, intrafilament bundle splitting, and minor filament entanglement. Multiaxis 3D basalt concrete, particularly in the B-4D structure, controlled the crack phenomena and it was recognized as a more damage-tolerant material than the neat concrete.
制备了多轴三维（3D）连续玄武岩纤维/水泥基混凝土。该研究的新颖之处在于，通过开发的平面缠绕成型方法，将所有连续的丝状束放置在预制件的平面内方向，从而多轴创建非交织预制件结构，以提高混凝土复合材料的断裂韧性。对多轴三维（3D）连续玄武岩纤维/水泥基混凝土的原理和离轴弯曲性能进行了实验研究。结果表明，多轴3D玄武岩混凝土的原理和离轴抗弯承载能力、抗弯强度和韧性性能受到原始混凝土中连续玄武岩丝束取向和布置的显著影响。与原始混凝土相比，单轴（B-1D-(0°)）、双轴（(B-2D-(0°)、B-2D-(90°)和B-2D-(+45°)）以及多轴（B-4D-(0°)、B-4D-(+45°)和B-4D-(-45°)）混凝土复合材料的原理和离轴抗弯强度及能量吸收性能显著更高。断裂的四向玄武岩混凝土在脆性水泥基体上有局部破损，在纤维上有扫帚状损伤特征、纤维-基体脱粘、丝束内部分裂以及少量纤维缠结。多轴3D玄武岩混凝土，特别是B-4D结构，能够控制裂缝现象，并且被认为是一种比纯混凝土更具损伤容限的材料。
