Microstructure and mineralogy of lightweight aggregates manufactured from mining and industrial wastes

作者：Gonzalez Corrochano B; Alonso Azcarate J^*; Rodas M; Barrenechea J F; Luque F J

来源：Construction and Building Materials, 2011, 25(8): 3591-3602.

DOI：10.1016/j.conbuildmat.2011.03.053

• Lightweight aggregate
• Microstructure
• Mineralogy
• Washing aggregate sludge
• Sewage sludge
• Clay-rich sediment

The microstructure and mineralogy of lightweight aggregates manufactured with washing aggregate sludge, sewage sludge and a clay-rich sediment have been studied. The mineralogical analysis revealed the neo-formation of plagioclase and pyroxene group minerals and a minor presence of gehlenite. Some relationships may be established: (i) heating temperature and dwell time affect the formation of new porosity; (ii) the disappearance of pyroxenes could produce changes in the density of the solid material in the lightweight aggregates; (iii) when an external glassy film is not present, water absorption values depend on the size and number of each type of pore.

• 出版日期2011-8