A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Microstructure and mineralogy of lightweight aggregates manufactured from mining and industrial wastes
Highlights ► We have studied the microstructure and mineralogy of LWA produced by wastes. ► The microstructure is controlled by the raw materials and heating conditions. ► There are several relations between the microstructure and the physical properties.
Abstract 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.
Microstructure and mineralogy of lightweight aggregates manufactured from mining and industrial wastes
Highlights ► We have studied the microstructure and mineralogy of LWA produced by wastes. ► The microstructure is controlled by the raw materials and heating conditions. ► There are several relations between the microstructure and the physical properties.
Abstract 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.
Microstructure and mineralogy of lightweight aggregates manufactured from mining and industrial wastes
González-Corrochano, B. (author) / Alonso-Azcárate, J. (author) / Rodas, M. (author) / Barrenechea, J.F. (author) / Luque, F.J. (author)
Construction and Building Materials ; 25 ; 3591-3602
2011-03-01
12 pages
Article (Journal)
Electronic Resource
English
LWA , lightweight aggregate , <italic>W</italic> , washing aggregate sludge , <italic>SS</italic> , sewage sludge , <italic>C</italic> , clay-rich sediment , WA<inf>24h</inf> , 24<hsp></hsp>h water absorption , BI , Bloating index , <italic>S</italic> , compressive strength , <italic>ρ<inf>b</inf></italic> , bulk density , <italic>ρ<inf>d</inf></italic> , dry particle density , BM , bulk mineralogy , LOI , loss on ignition , TG–DTA , thermogravimetry–differential thermal analysis , Qtz , quartz , Plg , plagioclases , Geh , gehlenite , Prx , piroxenes , <italic>T</italic> <inf>heating</inf> , temperature of heating , n.d. , not determined , Lightweight aggregate , Microstructure , Mineralogy , Washing aggregate sludge , Sewage sludge , Clay-rich sediment
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