同济大学学报（自然科学版）2024，Vol.52Issue(12)：1834-1842,9.DOI:10.11908/j.issn.0253-374x.23020
3D打印纤维再生细骨料混凝土孔隙结构与力学性能
Pore Structure and Mechanical Properties of 3D Printed Fiber-Reinforced Concrete with Recycled Aggregate
韩女 1肖建庄 2吕振源 3陈卫华4
作者信息
- 1. 同济大学 土木工程学院 上海 200092||宿迁学院 建筑工程学院 江苏 宿迁 223800
- 2. 同济大学 土木工程学院 上海 200092||广西大学 土木建筑工程学院 广西 南宁 530004
- 3. 同济大学 土木工程学院 上海 200092||中国建筑第八工程局有限公司 上海 200122
- 4. 上海浦东环保能源发展有限公司 上海 200127
- 折叠
摘要
Abstract
The mechanical properties of 3D printed fiber-reinforced concrete with recycled aggregate show significant anisotropy,which is closely related to meso-pore structure and interface region.Based on the visualization analysis of 3D printing concrete samples by computed tomography(CT),the porosity of 3D printed recycled concrete samples is ellipsoidal.The average pore compactness of 3D printed recycled concrete is significantly lower than that of mold-casted samples.The addition of polyethylene fiber and basalt fiber leads to the decrease of the mean compactness.Meanwhile,the ratio of pore length and Z-axis in 3D printed recycled concrete samples is as high as 58.0%at orientations between 60°to 90°,which is much higher than that of mold-casted samples with the same mixture.Fiber addition also affects the pore orientation of 3D printed recycled concrete.The pore in the vertical to Z axis has increased for polyethylene fiber 3D printing recycled concrete specimens,while that has decreased for basalt fiber 3D printing recycled concrete specimens.关键词
3D打印混凝土/纤维再生混凝土/孔隙结构/各向异性特征Key words
3D printed concrete/fiber-reinforced recycled concrete/pore structure/anisotropic characteristics分类
建筑与水利引用本文复制引用
韩女,肖建庄,吕振源,陈卫华..3D打印纤维再生细骨料混凝土孔隙结构与力学性能[J].同济大学学报（自然科学版）,2024,52(12):1834-1842,9.
