Manufacture and Microstructural Characterization of Fly Ash-Muck Artificial Aggregates with High Strength

Abstract

Abstract: The effect of different proportion of engineering muck and fly ash on the physical properties of artificial aggregates with high strength and low water absorption was studied. Moreover, the mineral composition, microstructure and porosity of artificial aggregates were characterized by X-ray diffractometer, X-ray computed tomography (X-CT), mercury intrusion porosimetry and scanning electron microscope. The results indicate that the density and strength of artificial aggregates increase firstly and then decrease with the increase of fly ash content. However, the water absorption variation shows the opposite trend. When the fly ash content is 50% (mass fraction), thehigh strength and low water absorption artificial aggregates with an apparent density of 2.17 g/cm³, compressive strength of 22.88 MPa, and water absorption rate of 0.055% are prepared. The decrease in the strength of artificial aggregates and the increase in water absorption is mainly due to the increased porosity caused by the insufficient liquid phase. High Al₂O₃ content in the raw material hinders the formation of a liquid phase, which degrades the physical properties of artificial aggregates.

Key words: solid waste, artificial aggregate, fly ash, muck, physical property, microstructure

CLC Number:

X705

ZHANG Rihong, MING Wei, WAN Wenhao, LIU Yunpeng. Manufacture and Microstructural Characterization of Fly Ash-Muck Artificial Aggregates with High Strength[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(8): 2819-2827.

References

[1] 马明亮,孙晓南,权宗刚,等.我国工业固废制备陶粒资源化利用的研究进展[J].硅酸盐通报,2020,39(8):2492-2500.
MA M L, SUN X N, QUAN Z G, et al. Research progress on resource utilization of ceramsite prepared from industrial solid waste in China[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(8): 2492-2500 (in Chinese).
[2] 汪学彬,杨重卿,张祥伟,等.工业固体废弃物制备陶粒及其应用研究进展[J].中国粉体技术,2021,27(2):1-8.
WANG X B, YANG C Q, ZHANG X W, et al. Preparation and application of ceramsite prepared from industrial solid waste: a review[J]. China Powder Science and Technology, 2021, 27(2): 1-8 (in Chinese).
[3] NADESAN M S, DINAKAR R P. Structural concrete using sintered flyash lightweight aggregate: a review[J]. Construction and Building Materials, 2017, 154: 928-944.
[4] 张磊,张鸿飞,荣辉,等.700~900密度等级渣土陶粒的研制及其性能[J].建筑材料学报,2018,5:803-810.
ZHANG L, ZHANG H F, RONG H, et al. Fabrication and performance of 700-900 density grade muck ceramsite[J]. Journal of Building Materials, 2018, 5: 803-810 (in Chinese).
[5] 季维生.700密度等级渣土陶粒制备及其性能研究[J].硅酸盐通报,2017,36(7):2209-2214.
JI W S. Preparation and performance of 700 density grades muck-ceramsite[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(7): 2209-2214 (in Chinese).
[6] 高瑞晓,荣辉,王海良,等.800密度等级的渣土陶粒制备及性能研究[J].硅酸盐通报,2017,36(5):1646-1650.
GAO R X, RONG H, WANG H L, et al. Preparation and performance of 800 density grades muck-ceramsite[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(5): 1646-1650 (in Chinese).
[7] YASHIMA S, KANDA Y, SANO S. Relationships between particle size and fracture energy or impact velocity required to fracture as estimated from single particle crushing[J]. Powder Technology, 1987, 51(3): 277-282.
[8] MORENO-MAROTO J M, GONZÁLEZ-CORROCHANO B, ALONSO-AZCÁRATE J, et al. Manufacturing of lightweight aggregates with carbon fiber and mineral wastes[J]. Cement and Concrete Composites, 2017, 83: 335-348.
[9] MORENO-MAROTO J M, GONZÁLEZ-CORROCHANO B, ALONSO-AZCÁRATE J, et al. A study on the valorization of a metallic ore mining tailing and its combination with polymeric wastes for lightweight aggregates production[J]. Journal of Cleaner Production, 2019, 212: 997-1007.
[10] LEE K H, LEE K G, LEE Y S, et al. Manufacturing and application of artificial lightweight aggregate from water treatment sludge[J]. Journal of Cleaner Production, 2021, 307: 127260.
[11] LI X G, HE C H, LV Y, et al. Effect of sintering temperature and dwelling time on the characteristics of lightweight aggregate produced from sewage sludge and waste glass powder[J]. Ceramics International, 2021, 47(23): 33435-33443.
[12] GAO W B, JIAN S W, LI X G, et al. The use of contaminated soil and lithium slag for the production of sustainable lightweight aggregate[J]. Journal of Cleaner Production, 2022, 348: 131361.
[13] LI X G, HE C H, LV Y, et al. Utilization of municipal sewage sludge and waste glass powder in production of lightweight aggregates[J]. Construction and Building Materials, 2020, 256: 119413.
[14] LIU T, TANG Y, HAN L, et al. Recycling of harmful waste lead-zinc mine tailings and fly ash for preparation of inorganic porous ceramics[J]. Ceramics International, 2017, 43(6): 4910-4918.
[15] WEI Y L, CHENG S H, OU K T, et al. Effect of calcium compounds on lightweight aggregates prepared by firing a mixture of coal fly ash and waste glass[J]. Ceramics International, 2017, 43(17): 15573-15579.
[16] 冯晋阳,龙民,陶海征,等.透辉石微晶玻璃的低温烧结制备及性能表征[J].人工晶体学报,2019,48(5):968-973.
FENG J Y, LONG M, TAO H Z, et al. Preparation and property characterization of diopside glass-ceramics by low-temperature sintering[J]. Journal of Synthetic Crystals, 2019, 48(5): 968-973 (in Chinese).[17] PONSOT I, BERNARDO E. Self glazed glass ceramic foams from metallurgical slag and recycled glass[J]. Journal of Cleaner Production, 2013, 59: 245-250.
[18] GAO W B, JIAN S W, LI B D, et al. Solidification of zinc in lightweight aggregate produced from contaminated soil[J]. Journal of Cleaner Production, 2020, 265: 121784.
[19] AYATI B, MOLINEUX C, NEWPORT D, et al. Manufacture and performance of lightweight aggregate from waste drill cuttings[J]. Journal of Cleaner Production, 2019, 208: 252-260.
[20] VU D H, WANG K S, BAC B H. Humidity control porous ceramics prepared from waste and porous materials[J]. Materials Letters, 2011, 65(6): 940-943.
[21] JI S C, GU Q, XIA B. Porosity dependence of mechanical properties of solid materials[J]. Journal of Materials Science, 2006, 41(6): 1757-1768.
[22] 张礼华.基于界面优化的铬铁冶金渣轻集料制备及混凝土性能研究[D].南京:东南大学,2018.
ZHANG L H. Preparation of lightweight aggregate use by ferrochrone slag based on the interfacial zone optimization and the performance of concrete[D]. Nangjing: Southeast University, 2018 (in Chinese).