Use of wood dust fly ash from an industrial pulverized fuel facility for rendering. (20th November 2018)

• Record Type: Journal Article
• Authors: Fuller, Aaron; Stegmaier, Michael; Schulz, Norbert; Menke, Martin; Schellhorn, Hans; Knödler, Friedrich; Maier, Jörg; Scheffknecht, Günter
• Is Part Of: Construction & building materials. Volume 189(2018)
• Page Start: 825
• Page End: 848
• Publication Date: 2018-11-20
• Subjects: C3A tricalcium aluminate -- C3S tricalcium silicate -- C-A-S-H CDW construction and demolition waste -- C-S-H nano-pours gel of calcium-silicate-hydrate (CaO-SiO2-H2O) -- H height -- L length -- OFA over-fire air -- OPC ordinary Portland cement -- Prair primary combustion air -- PSD particle size distribution -- RCA recycled concrete aggregates -- RH relative humidity -- RMA recycled mortar aggregates -- Secair secondary combustion air -- W width; Biomass -- Ash utilization -- Bioenergy -- Fly ash -- By-products -- Mortars -- Renders; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.09.016
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Wood fly ash is a viable component for render mortars. Wood dust fly ash from reducing conditions has excellent resistance to weathering. Wood fly ash from reducing conditions can replace a significant amount of cement. Wood fly ash from reducing conditions is good in mixtures for atmospheric CO2 sinks. Abstract: Wood dust II fly ash, which was generated after boiler retrofit (implementation of low-NOx burners combined with over-fire air), apparently is an enhanced quality for rendering. This is attributed to the mineral phases formed, an increase in the amount of free lime, and performance test results. After accelerated aging tests, the wood dust II fly ash showed no visible occurrence of cracks or detachment of the render base coat from the substrate. Tensile strength values met the applicable limit requirement of 8 MPa. The results contribute to a sustainable ash management for wood fly ash from pulverized fuel facilities.