Core Requirement: Visually present the complete mechanism of cement-stabilized macadam strength formation, displaying it in a layered manner according to the logic of "material composition → reaction process → strength cohesion." Clearly label key substances, reaction types, and their interactions at each stage, emphasizing interfacial effects and the structural densification process. Specific Presentation Elements: 1. Initial Material System: Clearly show the three-phase composition—continuously graded macadam particles (10-30mm particle size, labeled "aggregate skeleton"), cement powder (labeled "cementitious material"), and appropriate moisture content (labeled "reaction medium")—reflecting the packing state of aggregate particles and the dispersed distribution of cement powder. 2. First Stage: Cement Hydration Reaction (labeled "initial strength foundation stage"). Present the process of cement clinker minerals (tricalcium silicate, dicalcium silicate, etc., which can be simplified as "cement minerals") undergoing hydration reactions after contact between moisture and cement particles, generating C-S-H gel (labeled "core cementing substance") and Ca(OH)₂ crystals (labeled "auxiliary cementation and alkali activation medium"). Use arrows to indicate the reaction direction and label the "hydration heat release" characteristic. 3. Second Stage: Interface Bonding and Skeleton Reinforcement (labeled "core strength enhancement stage"). Show the process of C-S-H gel and Ca(OH)₂ crystals adhering to and spreading on the surface of macadam particles, filling the aggregate voids; focus on presenting the bonding state of the gel and macadam particle interface (labeled "interfacial transition zone"), and the process of Ca(OH)₂ reacting with active components on the aggregate surface (such as SiO₂, Al₂O₃, labeled "aggregate active components") to generate additional cementitious products, reflecting the synergistic effect of "cementation-interlocking." 4. Third Stage: Structural Densification and Strength Formation (labeled "final strength stabilization stage"). Present the state where hydration products continuously generate and interweave into a three-dimensional network structure, firmly cementing the dispersed macadam particles into a whole; label the "pore filling" process (hydration products fill the remaining voids, reducing porosity), highlighting the final formed "dense aggregate-cementitious body" overall structure, labeled "compressive/flexural strength carrier." Auxiliary Visual Requirements: Use different colors to distinguish each substance (e.g., gray for macadam, light yellow for cement hydration products, light blue for moisture), use dynamic arrows to indicate the direction of reaction and material migration, label the name and core function of each stage in different areas, and adopt a three-dimensional cross-sectional view to clearly present the correlation between the internal structure and the reaction process.
Core Requirement: Visually present the complete mechanism of...
