Exploration of the Technical Pathway for the Collaborative Preparation of Green and Environmentally Friendly Concrete Using Wood/Bamboo Particles

In response to the dual goals of reducing carbon emissions in construction and promoting solid waste utilization, this study systematically explores an integrated technical route for preparing green and sustainable concrete materials based on the "wood/bamboo particles-synergistic admixtures-low-carbon cementitious system." The research begins with the cleaning, drying, sieving, and surface modification (alkali treatment, silane coupling, or mineralization coating) of wood and bamboo particles, followed by material characterization. Mix design is then conducted through orthogonal and response surface methods combined with multi-objective optimization, targeting workability, mechanical strength, and durability. The performance evaluation covers slump/flowability, compressive/flexural strength, elastic modulus, and durability indices such as permeability resistance, chloride penetration, sulfate attack, freeze-thaw cycles, and carbonation depth. Microstructural analyses, including SEM/EDS, XRD, and MIP, are performed to reveal the synergistic mechanisms of interface transition zone (ITZ) densification and pore structure evolution. To ensure the reliability of results, statistical significance is verified through t-tests and ANOVA, and process control windows and quality acceptance criteria are proposed for practical engineering replication. On the environmental and economic fronts, a life cycle assessment (LCA) and cost model are established based on functional units to quantify differences in carbon footprint, energy consumption, and water usage, followed by sensitivity analyses. The results show that through interface modification and synergistic material design, wood/bamboo particles can significantly improve durability and microstructure while maintaining comparable mechanical strength, and notably reduce greenhouse gas emissions per unit volume. The recommended dosage range and construction parameters derived from this work provide a foundation for scaled application. Ultimately, the study formulates a closed-loop methodology-"material pretreatment-mix design optimization-performance and mechanism-LCA/economic analysis-engineering verification"-that offers a replicable paradigm for the standardized and practical application of bio-based solid waste in low-carbon concrete production.