Mechanical Properties of Composite Material Using Coal Ash and Clay

Abstract

Coal ash is industry waste exhausted lots of amount by electric power plant. The particle sizes of coal ash, especially coal fly ash are very fine, and the chemical component are extremely resemble with Okinawa-Kucha clay. From the point of view that clay is composed of particles of micro meter size in diameter, we should try the application for fabrication of composite material using coal fly ash and clay. The comparison of the mechanical properties of composite material using coal fly ash and clay were performed during electric furnace burning and spark plasma sintering. As a result, the bending strength of composite material containing the coal ash 10% and fired at 1423K using the electric furnace after press forming at 30 MPa showed the highest value of 47 MPa. This phenomenon suggests a reinforcement role of coal ash particles to clay base material. In spark plasma sintering process, the bending strength of the composite material containing the clay 5-10% to fly ash base material fired at 1473K and pressured at 20 MPa showed the highest value of 88 MPa. This result indicates a binder effect of clay according to the liquid phase sintering of melted clay surrounding around coal fly ash particles surface.

Effective utilization of recycled fine aggregate powder as reinforcement particles in polyethylene composite

“…RFAP chemical composition, established using energy dispersive X-ray fluorescence analysis (Shimadzu Corporation, EDX-8000), has been listed in Table 1, and included CaO, derived from waste cement, limestone crushed sand and sea sand, a SiO 2 and Al 2 O 3 ceramic materials. It was noted that, while the RFAP chemical components was similar to that of clay and fly ash, 38 there was a comparatively greater proportion of CaO.…”

Ceramics based on concrete wastes prepared by spark plasma sintering

“…Similarly, municipal solid waste ash [21,22], blast furnace slag [23][24][25][26], sewage sludge [27,28], and bagasse ash [29][30][31] have been suggested as raw material for ceramic processing. Furthermore, it has been suggested that materials with superior mechanical strength can be developed using the spark plasma sintering (SPS) method with industrial waste as a ceramic raw material [31][32][33][34][35]. The SPS method, which sinters raw material powders within a graphite mould under compression pressure, lowers the sintering temperature and produces materials with superior mechanical properties as compared to hot pressing [36][37][38][39][40].…”

Production and Characterization of Porous Ceramics From Coal Fly Ash and Clay

“…The presence of the liquid phase is evident in the three microstructures, but at least present in the sample PC20%P3 which microstructure is less homogenous. According to Fucumoto and Kanda (2009) the sintering process of fl y ash is performed by solid state sintering in the frame of the particles, while the sintering process of compos- ite material including clay is carried out by liquid and solid phase sintering due to lower melting point of clay. Therefore the surfaces around fl y ash particles are surrounded by the melted clay which is solidifi ed as binder around fl y ash particles.…”