Macro-meso failure characteristics of corn straw biomass integrated material columns with different integration methods under axial compression

Abstract Global wood resources have been in short supply for a long time, whereas corn straw resources are abundant. To effectively alleviate the shortage of wood resources and the harm caused by straw burning, this paper developed corn straw biomass integrated material substitute wood materials. Corn straw biomass integrated material is a new type of material produced by a new reorganization and integration process of corn straw, which can replace wood as a structural material in construction engineering. In this paper, the mechanical properties of the axial compression components of the three integrated methods of parallel texture integration, vertical texture integration, and combination texture integration of corn straw biomass integrated material are studied. Through experimental research on the corn straw biomass integrated material, the failure modes and bearing capacity of different integration methods are compared. The straw fiber characteristics of the failure surface of the axial compression component are observed on a mesoscopic scale. The axial compression failure mechanism is then analyzed and determined, and the optimal integrated method for the axial compression component of corn straw biomass integrated material is proposed. Strong theoretical support is provided for further research and application of corn straw biomass integrated material structural components, and a reliable reference for research on new sustainable biomass building materials is given.