— Foam concrete possesses low density and excellent thermal insulation properties and has been widely used in construction industry Considering the recycling and reusing of coal gasification slag CGS a solid waste product in the coal chemical industry CGS was used as the supplementary cementations material to prepare foam concrete
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— The hydration products of UHPC are mainly dominated by ultra high density calcium silicate hydrate UHD C S H and interfacial transition zone ITZ in UHPC has similar compact microstructure with the matrix [21] found that the utilization of ultra fine fly ash and steel slag powder in UHPC was feasible and the optimum steel slag powder
— Experimental Details Dilution experiment This can be divided into three steps of total experiment Firstly for the pre melting of the slag 400 g dry slag powder contained in a corundum crucible Φ70 mm × 120 mm were put into a high temperature furnace with a protective atmosphere by using argon gas at a flow rate of 200 mL/min
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— In Al/GS case the presence of the slag particles did not permit to obtain a similar densification rate Figure 2 obtaining relative densities of almost 90% at the same compaction pressure the bulk density of the composite being calculated according to the rule of mixture [4] Powder metallurgy manufacturing experience has shown that green
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— The density of nickel slag powder could be reduced via magnetic separation and there was no significant change in the crystal structure of the raw material Compared with porous ceramics prepared using nickel slag without magnetic separation ceramics subjected to magnetic separation had lower bulk density higher porosity and the same
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— For slag its density and surface are 1960 kg/m 3 and 420 m 2 /kg Table 1 Chemical composition of raw materials Empty Cell CaO SiO 2 Al 2 O 3 MgO Fe 2 O 3 SO 3 Na 2 O K 2 O LOI; FA Unlike fly ash slag powder the curve of size dispersion of pastes shift to the 30 150 μm corresponds to the dispersion states
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— slag produced at steel melting shop is known as steel slag Slag output obtained during pig iron and steel production is variable and depends mainly on composition of raw materials and type of furnace Typically for ore feed containing 60 to 65% iron blast furnace BF slag production ranges from about
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— CuW is widely used in high voltage electrical switch contacts rocket nozzle throat linings electronic packaging materials and other major high end technologies CuW is typically fabricated using infiltration and high temperature sintering methods based on powder metallurgy As CuW composites fabricated using these methods have the
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— Water cooled slag results in a porous and low density substance with particular physical properties that make the slag suitable for certain reuses If the slag is cooled under atmospheric conditions it tends to be hard and dense making it suitable for reuse in concrete products and other construction applications Indian Bureau of Mines
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— Steel slag is a by product of the steel industry and usually contains a high amount of f CaO and f MgO which will result in serious soundness problems once used as a binding material and/or aggregates To relieve this negative effect carbonation treatment was believed to be one of the available and reliable methods By carbonation treatment of
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— Fly ash FA and slag powder Slag were all purchased from the Hengnuo Filter Material Co ltd in Zhengzhou China The density of FA and Slag are g/cm 3 and g/cm 3 respectively The chemical compositions morphology and particle size distributions of the raw materials were measured Table1 presents the chemical
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— Portlandite has a lower density than free lime which increases volume 25 26 When completely immersed in water CaO can hydrate entirely and cause a volume increase as high as 100 % 27 If steel slag is given access to water the free lime will change to portlandite in a few days
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— This requires strictly selected materials to fill the pores to achieve a possible maximum packing density The mixture design for UHPC is more complicated and can be considered a metakaolin [34] limestone powder [35] steel slag powder [36] and rice husk ash [37] are used to reduce cement consumption carbon emission and
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