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Mobile crushers can also be called mobile crushing plants, mobile crushers, etc. It is an inevitable product of high-tech crushing technology in the new era, and its main features are that it can be operated mobilely, can walk freely, and is more convenient for transitions, ensuring that the equipment While the production is safe, the work process is more reliable.
·A study on the influence of the inclusion of slag or fly ash and five types of superplasticizers on the fresh and hardened properties of alkali activated cements is presented Three alkali activated slag formulations with different fly ash content 0 15 and 30% in the presence of five admixtures vinyl copolymer melamine and three polycarboxylates with
·Alkali sintering is a well established and effective way for recycling Al 2 O 3 from coal fly ash The outstanding feature of this method is that some stable mineralogical phases such as mullite Al 6 Si 2 O 13 and corundum Al 2 O 3 in coal fly ash can be decomposed by the additives CaCO 3 or Na 2 CO 3 during the high temperature sintering thereby a high
·Chloride diffusion in alkali activated fly ash/slag concretes Role of slag content water/binder ratio alkali content and sand aggregate ratio July 2020 Construction and Building Materials 261 1
·Utilization of municipal solid waste incineration fly ash MSWI FA can avoid land occupation and environmental risks of landfill In this paper MSWI FA was used to prepare alkali activated cementitious materials AACMs after two step pretreatment The ash calcination at 450 °C removed 93% of dioxins The alkali washing with g NaOH/g ash removed 89% of
·This study focuses on using activated fly ash to preparate silica aerogel by the acid solution alkali leaching method and ambient pressure drying Additionally to improve the performance of silica aerogel C6H16O3Si KH 570 and CH3Si CH3O 3 MTMS modifiers were used Finally this paper investigated the factors affecting the desilication rate of fly ash and
·Alkali activated binders more commonly referred to as geopolymers have recently emerged as a good alternative to traditional binders lime and cement for soil stabilisation Geopolymers utilise the alkaline activation of industrial waste to form cementitious products within treated soils leading to enhanced soil properties This paper aims to present a
·Alkali activated fly ash slag AAFS concrete is a new blended alkali activated concrete that has been increasingly studied over the past decades because of its environmental benefits and superior
This study investigated the mechanical properties and toughness of slag/fly ash based alkali activated cementitious materials AASF by incorporating PAM with different molecular weights and dosages the alkali content Na 2 O as a percentage of the powder materials was 8 % and the activator modulus was The PAM additive dosages were
Fly ash FA is a typical aluminosilicate solid waste and it has been intensively studied as a precursor for the preparation of geopolymers because it is widely available globally and has a relatively consistent chemical composition Turner and Collins 2013 Scrivener et al 2018 However the massive production and application of FA based geopolymers are still
·It has been found that optimum fly ash content depends on fly ash characteristics including CaO% soluble alkalis and glass composition aggregate reactivity and aggregate threshold alkalinity
·Geopolymer concretes have emerged as an alternative to traditional Portland cement concretes with high strength good durability well corrosion performance and high temperature resistance and being a sustainable and environmentally friendly material In this study a comprehensive microstructural analysis of low calcium fly ash based geopolymer
·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
·Fly ash the use of low calcium fly ash CSA Class F and Cl with CaO content < 20% increases resistance to sulphate atta ck Fly ashes with more than 20% CaO should be investigated for sulphate
·In the experimental study a Type III Portland cement meeting ASTM C150 specification was used The specific gravity Blaine s surface area and the alkali content of the cement were 540 m 2 /kg and % Na 2 O eq specific mixtures a class F fly ash was used as a cement replacement material on a mass basis
Synthesis of zeolite from fly ash by alkali fusion supercritical hydrothermal method Modern Chemical Industry 36 141 145 CrossRef Dai Z D Jiang X J Wang Y 2021 Organotemplate free synthesis of MOR zeolite from coal fly ash through 314 110872
·The production of Ordinary Portland cement OPC requires calcining limestone which leads to high energy consumption and CO 2 emissions [1] Alkali activation can use industrial solid wastes such as blast furnace slag and fly ash as the precursor to realize the effective utilization of the wastes
·1 Introduction Alkali activated materials AAMs or geopolymers are potential sustainable cementitious alternatives to ordinary Portland cement OPC [1] AAMs are produced with precursors such as fly ash FA ground granulated blast furnace slag GGBFS slag and metakaolin MK and are activated with alkaline activators at room temperature [3] [4] [5]
·Islam et al 2021 showed that the ash content of rice husk rice straw jute stick and wheat straw was determined to be 16 wt% wt% wt% wt% respectively Rice husk was found to contain the highest amount of ash 16 wt% Such a high ash content could lead to a series of industrial machinery problems such as fouling sintering slag deposition
·Fly ash is a greyish black powdery substance easily available and produced as a side product of burning any organic substance A huge amount of fly ash is generated worldwide and today s world faces a severe problem of its disposal Owing to its various applications researchers began utilizing fly ash as a catalyst to solve environmental problems
·contained moderately reactive fine aggregate and high alkali fly ash from Ottumwa Generating Station OGS A total of nine pavement sites were selected to be evaluated This study investigated the test methods used to determine the alkali content of fly ash It also evaluated if high alkali fly ash
·For example Fe element reacts with SiO 2 to form tubular crystal ferric silicate on fly ash surface after activating fly ash with alkali Fig 16 d Additionally high aluminum content in fly ash results in the distribution of crystalline particles with dendritic structures on fly ash surfaces as shown in Fig 16 e Rodríguez et al
·The content of the aluminosilicate component is low and the activity is lower than of fly ash Consequently the mechanical strength of RFG decreases as the red mud dosage is increased Furthermore Fig 3 a reveals that the mechanical strength of RFG decreased slightly when the dosage of red mud was lower than 30 wt%
·The fly ash is already used as an additive in Portland cement or brick industries and was recognized as one of the potential sources of aluminium silicate that can be used as precursor for obtaining new materials including geopolymers Aziz et al 2016; Ciobanu et al 2017 The geopolymer synthesis uses alkali solutions to dissolve the initial materials
·In the construction sector the material supply chain of aggregates is frequently disturbed due to seasonal unavailability quarrying issues and environmental norms The production of artificial aggregates has gained prominence to conserve natural resources and promote green construction practices The current study encompasses the production of alkali
4 ·The microscopic study of a set of alkali activated and thermally cured fly ash samples enabled the authors to establish a descriptive model for the microstructural development of fly ash based
·In this paper WM was used to replace precursor materials in alkali activated slag/fly ash Six mixes with different WM content were investigated Compressive strength development reaction products microstructure and micromechanical properties were characterized for a comprehensive understanding on the influence of WM on the AASF
·Investigation on red mud and fly ash based geopolymer Quantification of reactive aluminosilicate and derivation of effective Si/Al molar ratio based geopolymer under different NaOH concentrations were investigated and compared Third based on alkali leaching tests the effective molar ratios considering the reactive content of RM and
