蒸汽养护条件下3D打印混凝土的力学性能

Mechanical Performance of 3D Printed Concrete in Steam Curing Conditions.

作者信息

Wang Bolin, Yao Xiaofei, Yang Min, Zhang Runhong, Huang Jizhuo, Wang Xiangyu, Dong Zhejun, Zhao Hongyu

机构信息

CCCC First Highway Consultants Co., Ltd., Xi'an 710075, China.

Institute for Smart City of Chongqing University in Liyang, Chongqing University, Liyang 213300, China.

出版信息

Materials (Basel). 2022 Apr 13;15(8):2864. doi: 10.3390/ma15082864.

DOI:10.3390/ma15082864

PMID:35454556

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9025376/

Abstract

Three-dimensional (3D) concrete printing (3DCP) technology attracts significant attention from research and industry. Moreover, adequate mechanical performance is one of the primary properties for materials, meeting the demand of structural safety using 3DCP technology. However, research on curing conditions as the significant influence factor of mechanical capacity is required to accelerate the practical application of 3DCP technology. This study aims to explore the impact of various steam curing conditions (heating rate, constant temperature time, and constant temperature) on the mechanical performance of printed concrete containing solid wastes. Moreover, the optimal steam curing conditions are obtained for compressive, tensile, and flexural properties in different directions. Subsequently, anisotropies in the mechanical properties of printed composites and interlayer bonding behaviors are investigated when various curing conditions are employed. The result shows that steam curing conditions and solid waste incorporation improves the interlayer bond for 3D printed cement-based composites.

摘要

三维（3D）混凝土打印（3DCP）技术引起了研究界和工业界的极大关注。此外，足够的力学性能是材料的主要性能之一，以满足使用3DCP技术时结构安全的要求。然而，作为力学性能重要影响因素的养护条件研究对于加速3DCP技术的实际应用是必要的。本研究旨在探讨各种蒸汽养护条件（升温速率、恒温时间和恒温温度）对含固体废弃物的打印混凝土力学性能的影响。此外，针对不同方向的抗压、抗拉和抗弯性能获得了最佳蒸汽养护条件。随后，研究了采用不同养护条件时打印复合材料力学性能的各向异性和层间粘结行为。结果表明，蒸汽养护条件和固体废弃物掺入改善了3D打印水泥基复合材料的层间粘结。