【摘要】 在集中式光伏项目中，基础建设需大量使用水泥，不仅消耗自然资源，还对环境产生负面影响。探索和应用替代水泥的固化材料成为光伏产业实现绿色低碳发展的重要方向。本文从水泥减量化入手，以循环流化床粉煤灰（CFBFA）和脱硫石膏（FGD）为矿物掺合料，联合碳化养护技术制备光伏桩基础，进行了碳化试验、混凝土强度试验和室内模型试验，并分析了固废消纳能力。结果表明，碳化养护可通过优化混凝土孔结构提升力学性能：28 d碳化养护后，CFBFA掺量30%（质量分数）、FGD掺量3%（质量分数）的固废混凝土，抗压强度达45.2 MPa、劈裂抗拉强度达5.5 MPa，相较于标准养护固废组分别提升55.3%和89.7%。此外，固废光伏桩的抗拔极限承载力较传统桩基提高了6.7%，并且桩侧摩阻力表现更优。应用该固废基光伏桩碳化养护技术制备每1 000块光伏板基础，可减少标准煤耗42.2 kg/t，降低电量与资源消耗33.0%，同时消纳29.4 t CFBFA和2.9 t FGD。综上，固废基光伏桩碳化养护技术能够显著减少光伏项目中水泥的用量，达到固废资源化利用和碳减排的双重目标。更多还原

【Abstract】 In centralized photovoltaic projects, a large amount of cement is consumed in foundation construction, which not only depletes natural resources but also exerts negative impacts on the environment. Therefore, exploring and applying alternative curing materials to replace cement has become a crucial direction for the photovoltaic industry to achieve green and low-carbon development. Focusing on the core goal of cement reduction, this study used circulating fluidized bed fly ash(CFBFA) and flue gas desulfurization gypsum(FGD) as mineral admixtures, and prepared photovoltaic pile foundations by combining carbonation curing technology. Carbonation tests, concrete strength tests, and indoor model tests were carried out to systematically analyze the solid waste absorption capacity and engineering performance of this technology. The results show that carbonation curing can improve the mechanical properties of concrete by optimizing its pore structure: after 28 d carbonation curing, the solid waste concrete with 30% CFBFA and 3% FGD(mass fraction) achieves a compressive strength of 45. 2 MPa and a splitting tensile strength of 5. 5 MPa, which are 55. 3% and 89. 7% higher than those of the solid waste group under standard curing, respectively. In addition, the ultimate uplift bearing capacity of the solid waste-based photovoltaic pile is 6. 7% higher than that of the traditional pile foundation, and its pile side friction resistance performs better. When the carbonation curing technology for solid waste-based photovoltaic piles is applied to prepare foundations for every 1 000 photovoltaic panels, it can reduce standard coal consumption by 42. 2 kg/t, decrease electricity and resource consumption by 33. 0%, and absorb 29. 4 t of CFBFA and 2. 9 t of FGD simultaneously. In conclusion, the carbonation curing technology for solid waste-based photovoltaic piles can significantly reduce cement usage in photovoltaic projects and achieve the dual goals of solid waste resource utilization and carbon emission reduction.更多还原