| 生活垃圾焚烧解毒飞灰复合掺合料的制备及其在建材中的应用性能研究 |
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| 引用本文：俞伟伟.生活垃圾焚烧解毒飞灰复合掺合料的制备及其在建材中的应用性能研究[J].上海第二工业大学(中文版),2026,43(2):119-128 |
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| 基金项目:上海城投(集团) 有限公司2023 年科技创新计划项目(CTKY-ZDZX-2023-002) 资助 |
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| 中文摘要:为实现生活垃圾焚烧(MSWI) 解毒飞灰的资源化利用, 本研究采用XRD、XRF、热重分析及化学滴定等多方法联合定量解析飞灰的化学成分, 测得了活性组分约26%、惰性组分约61%、残余组分约7% 的组成分布图谱。本文提出飞灰与S95 级矿粉质量比为1 : 9 的复合掺合料配方, 其各项指标均满足JG/T 486—2015 标准要求。针对飞灰活性组分在水泥基与石灰基体系中作用机制的差异, 分别在干粉砂浆、水泥桩、水泥稳定碎石、石灰土和二灰土5 种典型建材场景中开展了差异化配方验证。结果表明: 水泥稳定碎石中, 采用飞灰: 粉煤灰: 矿粉= 1 : 1 : 3 的质量比替代50% 水泥时, 7 d 抗压强度较基准提升18%; 石灰土中来用相同配方替代50% 生石灰时, 强度仅下降2.5%; 而在水泥桩场景中, 当飞灰100% 替代换矿粉时, 强度高出10%。综合性能与经济性, 本文推荐优先在水泥稳定碎石和石灰土场景中使用含解毒飞灰的复合掺合料, 该策略可为MSWI 飞灰安全处置与高值化利用提供新的可行途径。 |
| 中文关键词:生活垃圾焚烧飞灰 解毒飞灰 复合掺合料 粒化高炉矿渣粉 无侧限抗压强度 资源化利用 |
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| Preparation and Application Performance of MSWI Detoxification Fly Ash Composite Admixture in Building Materials |
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| Abstract:To achieve the resource utilization of detoxification fly ash from municipal solid waste incineration (MSWI), multiple methods including XRD, XRF, thermogravimetric analysis and chemical titration were combined to quantitatively analyze the chemical composition of the fly ash and obtained a composition distribution pattern where active components accounting for approximately 26%, inert components about 61%, and residual components accounting for approximately 7%. In this paper, a compound admixture formula with a mass ratio of fly ash to S95 mineral powder of 1 : 9 was proposed, and all indicators of this formula meet the requirements specified in standard JG/T 486-2015. Inview of the differences action mechanisms of fly ash active components in cement-based and lime-based systems, differentiated formula verification tests were carried out in five typical building materials application scenarios: namely dry-mixed mortar, cement piles, cement-stabilized crushed stone, lime soil and lime-fly ash stabilized soil. The results show that when a mass ratio of the incineration fly ash: fly ash: mineral powder = 1 : 1 : 3 is used to replace 50% cement in cement-stabilized crushed stone, the 7-day compressive strength is increased by 18% compared with the benchmark. When the same formula is used to replace 50% quicklime in lime soil, the strength only decreases by 2.5%. In the cement pile scene, when fly ash fully replaces the mineral powder, the strength is 10% higher. In terms of comprehensive performance and economy, this paper recommends the priority use of composite admixtures containing detoxification fly ash fly ash in cement-stabilized crushed stone and lime soil scenarios, which can provide a new feasible approach for the safe disposal and high-value utilization of MSWI fly ash. |
| keywords:municipal solid waste incineration fly ash detoxification fly ash composite admixture ground granulated blast furnace slag unconfined compressive strength resource utilization |
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