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- 新型墙体材料
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淤泥烧结保温砌块的制备工艺、产品性能及微观
作者：贾鲁涛1，2，张亚梅2
（1.华电电力科学研究院有限公司，浙江 杭州 310030；
2.东南大学 材料科学与工程学院，江苏省土木工程材料重点实验室，江苏 南京 211189）
摘要：以湖泊淤泥为主要原材料、砖粉为瘠性料、煤粉为内燃料，在中试生产线上采用真空挤压塑性成型技术制备并经烧结制备湖泊淤泥烧结保温砌块。试验结果表明，当湖泊淤泥掺量为75%、砖粉掺量为10%、煤粉掺量为15%时，经930 ℃高温焙烧，可制备出抗压强度大于5.0 MPa，导热系数为0.249 W/（m·K）的淤泥烧结保温砌块。SEM分析表明，经高温焙烧后，可以获得较为致密的微观结构。以湖泊淤泥、煤粉为主要原材料生产烧结砌块是实现淤泥、工业废渣等综合利用的有效途径。
关键词：湖泊淤泥；烧结砌块；工艺；性能
中图分类号：TU522.3 文献标识码：A 文章编号：1001-702X（2019）05-0098-05
Preparation process，performance and microstructure of fired heat preservation blocks made of lake silt
JIA Lutao1，2，ZHANG Yamei2
（1.Huadian Electric Power Research Institute Co. Ltd.，Hangzhou 310030，China；2.School of Materials Science and Engineering，Jiangsu Key Laboratory of Construction Materials，Southeast University，Nanjing 211189，China）
Abstract：Lake silt，brick powder and cinder were used as the main raw materials to prepare fired heat preservation blocks using the vacuum plastic extrusion in a pilot scale study. Results showed that fired heat preservation blocks with compressive strength（above 5 MPa） and thermal conductivity of 0.249 W/（m·K） can be made from 75% lake silt，10% brick powder and 15% cinder under 930 ℃ high temperature. Scanning electron microscopy images showed that the microstructure of fired heat preservation blocks was very dense. This study proves that comprehensive utilization of lake silt，cinder would be promoted by producing fired heat preservation blocks.
Key words：lake silt，fired block，preparation process，performance