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·In this study the effects of foam content different dosages of fly ash slag silica fume and water to binder ratio on a series of properties of foamed concrete were examined In total 39 mixes of foamed concrete were prepared and corresponding fluidity mechanical strength water absorption and resistance against freezing thawing cycles
·This study investigated the impact of adding different proportions of ground granulated blast furnace slag GGBS on the engineering properties of expansive soils GGBS proportions ranging from 0 to 40% by weight of soil were tested A comprehensive series of experiments was conducted to determine the consistency limits modified compaction
·The main purpose of this work is to provide a comprehensive review of fly ash as a construction material To achieve this goal this literature review uses the following five steps 1 Selecting review topics as follows characterization compositional understanding activation approaches nanotechnology applications durability and sustainability evaluations of fly ash or
Request PDF On Jan 1 2022 Sulei Zhang and others published A Systematic Research on Foamed Concrete The Effects of Foam Content Fly Ash Slag Silica Fume and Water to Binder Ratio Find
The feasibility of a waste glass powder residue GP from glass recycling as partial mineral precursor to produce alkali activated materials is investigated GP served as powder coal fly ash PCFA replacement within a reference system composed of 50% PCFA and 50% ground granulated blast furnace slag GGBS
·Although the compositions of MSWI FA were variable in different cases a high alkali content pH was Main mineral phases are Ca OH 2 AFt and C 3 A Based on the geopolymerization mechanism the co disposal of MSWI FA and other wastes red mud blast furnace slag coal fly ash etc has been investigated in recent
·By adding steel slag powder while keeping the content of mineral powder and fly ash constant the crack area per unit area in concrete reduced with increased content of steel slag powder Additionally G53 15% mineral powder 15% fly ash and 15% steel slag powder revealed the smallest crack area per unit area recorded at mm/m 2 %
·The present work reviews the various mineral admixtures used in concrete which modifies the concrete properties In this study cement is partially or completely replaced by different mineral admixtures such as fly ash silica fume rice husk ash Ground Granulated Blast Furnace Slag palm oil fuel ash and metakaolin The strength obtained is different for different
·The paper deals with developing fly ash Blast Furnace Slag BFS composite with additives like cement to utilize waste material in engineering applications The additive like cement with different proportions has gained particular attention worldwide because of the excellent bonding strength and enhancement of mechanical properties of fly ash composite
· Test materials To prepare the cement backfill material raw materials such as fly ash slag NaOH solution coal gangue and basalt fibres were prepared in advance as shown in Fig chemical compositions of the raw materials are presented in Table ash was obtained from Shendong Power of National Energy; slag was obtained from Ansteel
·the quality of fly ash Pulverized coal enters the boiler where then the mineral content in the coal melts during the burning process Large ash particles gather just after the boiler as cinder ash while fine particles that drift as far as the electric precipitator are collected as fly ash The loss on ignition LOI Blaine fineness
·Raw Materials This experiment mainly uses fly ash mineral slag water glass sodium hydroxide and deionized water as the raw material Fly ash is from Dalian Huaneng Power Co Ltd and mineral slag is granulated blast furnace slag It is called slag for short in this paper both belong to solid waste produced by smelting metals and their chemical
·The effect of the activator modulus 0 and the slag content 0% 30% 50% 70% and 100% on a the initial setting time and b final setting time of alkali activated fly ash
·Fly ash FA Ground granulated blast furnace slag GGBFS are two types of mineral admixtures frequently using in the SCC FA is a fine grained residue of coal combustion in coal fired power plant GGBFS is a ground glassy granular material formed when molten blast furnace slag is quickly cooled
·Coal fly ash CFA is an industrial by product generated during combustion in coal fired power plants China generated approximately 620 million tonnes of CFA in 2015 and annual generation is still increasing Sun et al 2017 However technical limitations mean that large amounts of fly ash cannot be fully utilized at present
·Nowadays the industrial by products Fly ash FA Ground granulated blast furnace slag GGBFS as mineral admixtures for the production of the self compacting concrete SCC had been increasingly widespread In this study the SCC with FA GGBFS of 20% 30% 40% were prepared the fresh mechanical durability properties and porosity of the SCC were
·Fly ash from bituminous and anthracite coal combustion results in siliceous fly ash F grade fly ash F CFA with CaO content mostly below 10 % belonging to silica rich or aluminium rich fly ash Another type of CFA is derived from the combustion of lignite or sub bituminous coal producing calcium rich fly ash C grade fly ash C CFA with
·The small size and the glassy texture of fly ash and slag makes it possible to reduce the amount of water required for a given consistency Workability All mineral admixtures tend to improve the cohesiveness and workability of fresh concrete but many do not possess the water reducing capability of fly ash and slag
·In order to reduce CO 2 emissions the power industry started to burn coal with addition of other fuels mainly biomass zero emission fuel This fact has been reflected in the European standard EN 450 1 2012 [17] The subject of research in recent years is also ashes from the combustion of other than coal alternative fuels mainly renewable biomass [[18] [19]
·Fly ash possesses certain distinct mineral phases however few slag categories do not show well resolved x ray diffraction patterns mainly due to the glassy state [51] [112] [113] [114] Fly ash and slag which are generally used as alternative binding materials in paste backfill mainly consist of SiO 2 Al 2 O 3 Fe 2 O 3 CaO K 2 O
·Copper slag can be used in high performance concrete for marine environment with the addition of fly ash & silica fume [16] 40%−50% of sand can be replaced by copper slag [17] [18] 100% sand can be replaced by copper slag for high strength concrete with the addition of 1% Nano silica [19] Copper slag has been used by researchers to
As observed the initial setting time presented different trends as the activator modulus and slag content varied For the fly ash/slag blended system the initial setting time varied between 20 to 50 min which is quite short compared to that of OPC This is in agreement with previous findings In general the initial setting time and final
