Study on bending strength of cementitious composites based on fiber alignment

Abstract

The traditional cement-based composites can't meet the needs of actual 3D printing, people are committed to get breakthroughs in printing materials and extrusion process. This paper introduces the preparation of fiber-reinforced concrete materials, determining the optimum content of glass fiber in composite cement-based materials, and studying the fiber alignment during extrusion. From the bending strength, the performance of 3D printed fiber concrete materials are comprehensively analyzed. As a result, the bending strength of the sample does increase to the fiber volume ratio. The composite cement-based material with 2 vol.-% aligned fiber can have an excellent flexural strength of 12.05MPa, and the samples along the extrusion direction are more excellent than that along the transverse direction.