| 摘要: |
| 采用破碎、碳化和腐熟3种方法预处理园林垃圾，并按质量分数0%、3%、6%、9%和12%掺入工程弃土中，制备得到工程弃土烧结砖，并对其进行基本性能研究.结果表明：掺入园林垃圾后混合物料的塑限和液限提高，烧结后的主要产物为钾长石、斜长石、赤铁矿和莫来石；烧结砖的孔隙率增加、微观结构变得松散、吸水率增大、表观密度降低、体积收缩先增大后减小、质量损失增大；碳化园林垃圾因其颗粒小、有机质含量少、对烧结砖微观结构影响小且烧结产物中含有莫来石等，对烧结砖的力学性能影响最小；以质量分数6%的碳化园林垃圾掺入工程弃土中所制备的烧结砖抗压强度有所提升. |
| 关键词: 烧结砖 工程弃土 园林垃圾 碳化 腐熟 |
| DOI：10.3969/j.issn.1007-9629.2022.11.013 |
| 分类号:TU522.1;TU522.06 |
| 基金项目:中韩国际合作重点项目（2022TFE0198300） |
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| Effects of Garden Waste on the Properties of Sintered Bricks Prepared with Construction Spoil |
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GAO Qi1,2, XIAO Jianzhuang1, SHEN Jianyu1
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1.College of Civil Engineering, Tongji University, Shanghai 200092,China;2.Xuchang Jinke Resources Recycling Co., Ltd., Xuchang 461000,China
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| Abstract: |
| Three methods of pulverizing， carbonizing and decomposing were used to pretreat the garden waste， and sintered bricks were prepared by mixing the construction spoil and treated garden waste. The sintered brick was prepared with the mass mixing ratios of 0%、3%， 6%， 9% and 12% of the treated garden waste and the basic properties of sintered construction spoil bricks were studied. The results show that the plastic limit and liquid limit of the construction spoil are increased after the addition of garden waste. The main products after sintering are potassium feldspar， plagioclase， hematite and mullite. With the increase of the mixing ratios， the micropores increase， the microstructure becomes looser， the water absorption increases， the density decreases， the volume shrinkage first increases and then decreases， and the mass loss increases. It is found that carbonized garden waste has the least influence on the mechanical properties of sintered brick because of its small particle size， less organic matter， little influence on the microstructure of sintered brick and mullite in sintered product， the compressive strength of sintered brick can be improved by adding 6% mass fraction of waste clay. |
| Key words: sintered brick construction spoil garden waste carbonizing decomposing |
