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·The Class F fly ash used in this experiment was obtained from the Huaneng Power Plant in Qingdao Shandong Province China It has a specific surface area of 517 m 2 /kg and an apparent density of g/cm chemical composition is listed in Table total Si oxide and Al oxide content of the fly ash is %
·Alkali activated materials AAMs manufactured by the reaction between alkaline activator and solid aluminosilicate powders fly ash FA ground granulated blast furnace slag GGBFS and calcined clay have attracted much interest in academic and industrial fields over the past decades [1] [2] AAMs present comparable mechanical properties and
·Alkali silica reaction ASR mitigation mechanisms of fly ash in concrete are still being debated and remain an interesting research topic This study provides new insights into the role of aluminum oxide Al 2 O 3 in fly ash particles on ASR comprehensive test program was conducted and included expansion measurements dissolution model
·The alkali activator used for preparation of the alkali activated cementitious material was water glass sodium silicate solution with moduli n SiO 2 /Na 2 O molar ratio of g sodium hydroxide NaOH tablets that were dissolved directly into 100 g commercial water glass with modulus of to adjust the modulus to content of Na 2 O SiO 2
·DOI / Corpus ID 103212132; Alkali metal transformation and ash deposition performance of high alkali content Zhundong coal and its gasification fly ash under circulating fluidized bed combustion
·At the forefront of the technical concerns is uncertainty associated with compared the resistance of Portland cement alkali activated fly ash alkali activated slag and a combination of 50% fly ash and slag mortars They prepared beams 40 × 40 × 160 mm for each mix which were subjected to freeze thaw cycles with water not de icing
·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
·Thus in this research the durability performance of mortar composed with alkali activated fly ash based LWA and commercial expanded clay EC LWA was investigated The fly ash LWA was prepared in a pan granulator with a 6 molar solution of NaOH mixed with Na2SiO3 in a Na2SiO3/NaOH weight ratio of being used as activator FA 6M LWA
·Treatment of municipal solid waste incineration fly ash State of the art technologies and future perspectives Although the compositions of MSWI FA were variable in different cases a high alkali content pH was generally Ash circulation technology could be used to return secondary fly ash to the melting furnace and finally
·Geopolymer as a new type of solid waste based inorganic cementitious material exhibits outstanding behavior in terms of physical and chemical performance macromechanical properties long lasting stability and features potential application development tendency in the field of repair and reinforcement of existing concrete structures This paper investigated the
·This paper shows the effect of the nature of some alkaline activators in the microstructural development of thermal alkali activated f/y ash systems The alkaline compounds employed in this investigation were NaOH KOH Na2C03 K2C03 sodium silicate and potassium silicate Results confirm that the main reaction product of the activation process throughout
·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 CaO content exceeding 10 % belonging to alkali rich fly ash MSWIFA exhibits a higher average CaO content compared to CFA ranging from % to %
·The development of cementless concrete is attracting increasing attention in practice and research to reduce both greenhouse gas emissions and energy consumption of concrete Alkali activated materials AAMs are one of the viable alternatives to replace Portland cement due to their lower CO2 emissions This study investigated the evolution of rheological
·This paper illustrates a special investigation on geopolymer concrete synthesized from fly ash sand coarse aggregates solid phases in conditions of sodium silicate solution and seawater liquid phases The mixtures of geopolymer concrete were designed with proportion changes of among materials to evaluate effects of the proportions to engineering properties of
·In recent decades alkali activated and blended cements have attracted great interest worldwide due to their advantages of low energy cost high strength and good durability This study evaluated the effects of replacing 50% of Portland cement with a mixture of three waste materials ground granulated blast furnace slag GGBFS fly ash FA and geothermal
·The aim of the research was to investigate the influences of high alkaline content foundry sand regeneration wastes incorporated with fly ash in the production of geopolymer concrete The fly ash based geopolymer concrete was activated using alkaline solutions of sodium silicate and sodium hydroxide The geopolymeric products were characterized using X
·According to the GB/T50146 2014 Technical Specification for Fly Ash Concrete Application [41] the maximum allowable fly ash content in ordinary Portland cement should not exceed 30 % when the water binder ratio is greater than In this experiment when the other variables were varied the fly ash content remained unchanged at 20 %
·Ca content of fly ash has a major impact on the application of fly ash In general fly ash with Ca content <10% is called low calcium fly ash; fly ash with Ca content at 10 20% is intermediate calcium fly ash; and that with Ca content >20% is called high calcium fly ash [] Fly ash includes strong cementitious ash 15 min internal condensation intermediate
·Fly ash is a waste material obtained from burning of coal in thermal power plants Coal consumption is still very high and is expected to remain above 38% globally Therefore large volumes of fly ash are produced every year that need to be managed as waste Improper disposal of fly ash can lead to surface water and ground water pollution and
·With the increase in fly ash content on soil stabilized with terrazyme an improvement in UCC value was observed whereas there was not much improvement in CBR value up to 30% addition of fly ash
the rheology and thixotropy of one part alkali activated fly ash/slag pastes The effects of solid activator content fly ash content and fly ash composition on the dynamic yield stress static yield stress and stress decay process are delivered in this
·Mechanical Properties Prediction of Blast Furnace Slag and Fly Ash Based Alkali Activated Concrete by Machine Learning Methods flexural strength and Poisson s ratio of BFS/FA AACs The importance index of each parameter on the strength of BFS/FA AACs was elaborated as well For all open access content the Creative Commons licensing
·The effect of different fly ash to alkaline activator ratio 0 and on the physical and mechanical properties of treated fill soil were measured using Atterberg limit test and
·alkali activated fly ash alkali activated slag and a combination of 50% fly ash and slag m ortars They They prepared beams 40 x 40 x 160 mm for each mix which were subjected to freeze thaw
