This paper deconstructs the inherent defects of "steel-clad wood" formwork due to stiffness mismatch and internal electrochemical corrosion from the perspective of fundamental engineering physics. It quantitatively compares the mechanical boundaries of aluminum alloy (elastic modulus ~70 GPa) and structural steel (elastic modulus ~210 GPa) under high fluid lateral pressure. Simultaneously, it systematically analyzes the cost-effectiveness of general-purpose Q235 carbon steel, the optimization of section modulus of Q700 high-strength steel under extreme heavy loads, and the microscopic mechanism of "cut self-healing" of a 1.5mm ZAM (zinc-aluminum-magnesium) coating in strongly alkaline concrete environments through electrochemical sacrificial anodes. This provides global EPC contractors with quantitative decision-making basis for life-cycle cost (LCC).

 

Many builders only consider the purchase price when choosing templates, but overlook issues such as secondary plastering, rework, construction period, disposal costs of used wooden templates, and material residual value. This article starts from the cost accounts that bosses are most concerned about, conducts a practical comparison of wooden templates, plywood templates, aluminum alloy templates and steel templates, and explains why metal templates are becoming a more rational choice in markets with high labor costs.