Study on progressive cracking of fiber-reinforced mortar under repeated dynamic loads and biaxial constraints

Research Overview: Journal of Building Engineering, Volume 133 (published on December 1, 2026) Hua-Chuan Wang、Hao-Jun Wang、Zeng Ding、Qian-Bing Zhang The research focuses on the progressive cracking behavior of fiber-reinforced mortar under repeated dynamic loads and biaxial constraints. This study belongs to the direction of mechanical properties and damage evolution of building materials, and is directly related to topics such as concrete modification and durability evaluation in the building and home decoration column.

Core issues of research concern

Fiber reinforced mortar is often subjected to multi-directional stress in building structures and may withstand repeated dynamic loads.

. The study focuses on how internal cracks in mortar gradually develop, propagate, and ultimately affect material properties under repeated dynamic loads and biaxial constraints as experimental conditions. This perspective is different from a single static load test and is closer to the complex stress environment that materials experience in practical engineering. From the perspective of the column field, this study involves the formulation composition of building mortar (fiber reinforcement), mechanical property testing, and damage evaluation methods, and belongs to the research category of building material properties. Although the research object is not PVC profiles or sealants, its analytical approach to fiber reinforcement and crack control has reference value for understanding the performance degradation of building materials under long-term loads.

Significance for the polymer additive industry

When building and home decoration materials are used outdoors or in humid environments for a long time, weather resistance and stability are one of the key points in formula design.

. PVC profiles, architectural coatings, sealants and other products usually require the use of antioxidants, light stabilizers and other additives to delay aging and reduce cracking. The study on progressive cracking of fiber-reinforced mortar suggests that material damage is often a multifactorial and gradual accumulation process, and the design of additive systems should also focus on maintaining performance under long-term dynamic loads and constraint conditions. For building materials, cracking not only affects appearance, but may also weaken waterproofing, insulation, and flame retardant functions. Combining antioxidants, light stabilizers with fiber reinforcement, matrix modification, and other methods can help improve the stability of materials under complex stress and climate conditions. The experimental ideas provided by this study can also provide reference for the improvement of durability testing methods for building materials.

Boundary to be noted

This study focuses on the mechanical behavior of fiber-reinforced mortar and does not involve the specific formulation of polymer additives or the evaluation of the effectiveness of weather stabilizers.

. The relevant conclusions should not be directly extrapolated to PVC profiles or coating systems, and industry applications still need to be validated in conjunction with specific material systems.

Information source:Progressive fracturing of fibre-reinforced mortar under repeated dynamic loadings and biaxial confinement， Organized by Herun Chemical.