(PDF) Performance of Alkali Activated Slag and Alkali
Performance of Alkali Activated Slag and Alkali Activated Slag Fly Ash with various Alkali Activators. venkat tilak. avuthu narender reddy. venkat tilak. avuthu narender reddy. Download PDF. Download Full PDF Package. This paper. A short summary of this
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Sulfuric acid resistance of one-part alkali-activated
One-part alkali-activated (geopolymer) mortars based on three different silica-rich starting materials and sodium aluminate with and without ground granulated blast furnace slag (GGBFS) addition were tested regarding sulfuric acid resistance according to DIN 19573 (70 days at pH = 1).
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Sulphuric Acid Resistance of Slag Geopolymer Concrete
Oct 28 2020 · This work is an experimental study on sulphuric acid resistance of geopolymer concrete. The main variables considered throughout the research program were fly ash content from 0.0 to 40 and silica fume content as replacement of quenched slag in addition to sodium hydroxide molarity and added water content. These variables were studied through 18 mixes.
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Electrical and Self-Sensing Properties of Alkali-Activated
The electrical properties of concrete are gaining their importance for the application in building construction. In this study graphite powder was added to alkali-activated slag mortar as an electrically conductive filler in order to enhance the mortar s conductive properties. The amount of graphite ranged from 1 to 30 of the slag mass.
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Alkali Activated Slag Mortars Provide High Resistance to
Keywords alkali-activated cement blast furnace slag white Portland cement corrosion chloride sulfide. Citation Criado M and Provis JL (2018) Alkali Activated Slag Mortars Provide High Resistance to Chloride-Induced Corrosion of Steel. Front. Mater. 5 34. doi 10.3389/fmats.2018.00034
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Resistance of Alkali-activated Slag Cement Against Sodium
Resistance of Alkali-activated Slag Cement Against Sodium Sulfate A. Allahverdi 1 2 H. Hashemi 1 The water-to-cement ratio for Portland cement mortar and paste specimens ZHUH ¿ HG DW DQG UHVSHFWLYHO Specimens of Portland cements were prepared in
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Decalcification resistance of alkali-activated slag.
Sep 30 2012 · This paper analyses the effects of decalcification in concentrated 6M NH(4)NO(3) solution on mechanical and microstructural properties of alkali-activated slag (AAS). Portland-slag cement (CEM II/A-S 42.5 N) was used as a benchmark material.
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Resistance of Alkali Activated Slag Cement Mortar to
The setting time of alkali activated slag cement tends to be much faster than ordinary Portland cement and its compressive strength had been higher from the 1 day but became lower than that of
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Investigating the resistance of alkali-activated slag
alkali-activated slag cement exhibits a higher sulfate resistance compared to type 2 and even type 5 Portland cements. Keywords Magnesium sulfate Alkali-activated slag Compressive strength. 1. Introduction In the last decades attention has increasingly been paid on alkali activated binders 1-4 . Most of the investigations
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Handbook of Alkali-Activated Cements Mortars and
This book provides an updated state-of-the-art review on new developments in alkali-activation. The main binder of concrete Portland cement represents almost 80 of the total CO2 emissions of concrete which are about 6 to 7 of the Planet s total CO2 emissions. This is particularly serious in the current context of climate change and it
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The Influence of Activator Composition on the Strength
Alkali-activated slag materials are known for their high chloride penetration resistance. This makes them potentially applicable as repair systems for damaged steel-reinforced concrete structures which are exposed to chloride attack. For this purpose the influence of the activator composition i.e. the SiO2 and Na2O concentration of the alkaline solution on a) the compressive strength b
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Shrinkage Behavior of Alkali-Activated Slag Cement Pastes
Nowadays alkali-activated cements (AACs) are the most promising alternatives to ordinary portland cement (OPC). Such cements characterized by better strength and corrosion resistance that determine improved durability of materials based on them. However the shrinkage of AAC systems is noticeably higher compared with OPC.
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Resistance to Chlorides of the Alkali-Activated Slag Concrete
CiteSeerXDocument Details (Isaac Councill Lee Giles Pradeep Teregowda) This paper presents an analyze the role of chlorides in causing corrosion in the alkali-activated slag (AAS) concrete its mechanism of action the critical threshold on. Rapid Chloride Permeability test (RCPT) was conducted to measure the chloride permeability relative permeability (RP) and the AC resistivity were
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Alkali Activated Slag Mortars Provide High Resistance to
Keywords alkali-activated cement blast furnace slag white Portland cement corrosion chloride sulfide. Citation Criado M and Provis JL (2018) Alkali Activated Slag Mortars Provide High Resistance to Chloride-Induced Corrosion of Steel. Front. Mater. 5 34. doi 10.3389/fmats.2018.00034
Get PriceApplication of response surface methodology to optimize
Optimization was performed using desirability approach of the RSM with an objective to maximize 28‐day flexural and compressive strength while minimizing water absorption and drying shrinkage. The optimum values of limestone powder glass powder and alkali content with highest desirability of 0.706 are 15.80 17.02 and 6.71 respectively.
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An investigation of resistance of sodium meta silicate
Luga (2015) studied the resistance of NaOH alkali activated slag and fly ash geopolymer mortar mixtures to acidic and basic mediums. Prismatic alkali activated slag mortar specimens with size of 40x40x160 mm were prepared and cured at 100°C for 72 hours and control cement mortar was prepared and cured in water at 23°C for 28 days. The specimens
Get PriceRESISTANCE OF ALKALI-ACTIVATED SLAG CONCRETE TO ACID
Alkali-activated slag (AAS) concrete has the potential of superior durability in aggressive environments compared with ordinary Portland cement (OPC). This study investigates the durability of AAS concrete exposed to acid attack. To study resistance of AAS concrete in acid environments AAS concrete was immersed in an acetic acid solution of pH=4.
Get PriceResistance of alkali-activated slag concrete to acid
Oct 01 2003 · This paper presents an investigation into the durability of alkali-activated slag (AAS) concrete exposed to acid attack. To study resistance of AAS concrete in acid environments AAS concrete was immersed in an acetic acid solution of pH=4. The main parameters studied were the evolution of compressive strength products of degradation and
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Elucidating the Crack Resistance of Alkali-Activated Slag
The resistance of alkali silicate-activated slag mortars to crack propagation is explored. With increasing SiO 2-to-alkali oxide ratio (M s) of the activating solution (between 1.0 and 2.0) the flexural strengths fracture energies and the strain energy release rates (crack resistance G R) are noted to increase.The G R values especially of the systems with M s of 1.5 and 2.0 are higher
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ReSiStanCe Of alkali aCtivated WateR- COOled Slag
Resistance of alkali activated water-cooled slag geopolymer to sulphate attack CeramicsSilikáty 55 (2) (2011) 157 geopolymeric systems are specifically adsorbed ions on the surface of WCS particles changing the surface speciation according to the chemical equation > t–Oh na → t–Ona h
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An investigation of resistance of sodium meta silicate
Luga (2015) studied the resistance of NaOH alkali activated slag and fly ash geopolymer mortar mixtures to acidic and basic mediums. Prismatic alkali activated slag mortar specimens with size of 40x40x160 mm were prepared and cured at 100°C for 72 hours and control cement mortar was prepared and cured in water at 23°C for 28 days. The specimens
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Durability Properties of Alkali Activated Slag Composites
Jun 20 2019 · This study presents a shot overview on the durability properties of alkali-activated slag (AAS) composites. The durability properties of AAS explored include permeability alkali silica reaction carbonation freeze and thaw fire resistance corrosion and resistance to
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Alkali activated slag mortars provide high resistance to
The pore solutions of alkali-activated slag cements and Portland-based cements are very different in terms of their chemical and redox characteristics particularly due to the high alkalinity and high sulfide content of alkali-activated slag cement. Therefore differences in corrosion mechanisms of steel elements embedded in these cements could be expected with important implications for the
Get PriceResistance of Alkali-Activated Slag Concrete to Chloride
The corrosion resistance of steel in alkali-activated slag (AAS) mortar was evaluated by a monitoring of the galvanic current and half-cell potential with time against a chloride-contaminated environment. For chloride transport rapid chloride penetration test was performed and chloride binding capacity of AAS was evaluated at a given chloride.
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Research Article Carbonation Characteristics of Alkali
carbonation rate of an alkali-activated slag concrete with a water-to-slag ratio of . was similar to that of Portland cement concrete with a water-to-cement ratio of . . e aim of this study is to investigate the carbonation characteristicsofAASbinder.Forthispurpose mortarspec-imens of AAS with di erent dosages of activator and OPC
Get PriceAlkali activated slag mortars provide high resistance to
Criado M and Provis JL (2018) Alkali Activated Slag Mortars Provide High Resistance to Chloride-Induced Corrosion of Steel. Front. Mater. 5 34. doi 10.3389/fmats.2018.00034 Alkali Activated Slag Mortars Provide High Resistance to Chloride-Induced Corrosion of Steel MariaCriadoandJohnL.Provis
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Performance of Fibre-Reinforced Slag-Based Alkali
COOH) acid on alkali activated slag (AAS) mortar with different fibers. 2 Material and Methodology Alkali activated slag mortar (G1) was made with ground granulated blast furnace slag co-grinded with anhydrous sodium silicate in the ratio of 1 9. Binder to aggregate ratio was 1 2 in which the fibers (Steel glass basalt) were introduced.
Get PriceResidual compressive behavior of alkali‐activated concrete
Aug 21 2008 · Arash Sedaghatdoost Kiachehr Behfarnia Mohammad Bayati Mohammad sadegh Vaezi Influence of recycled concrete aggregates on alkali-activated slag mortar exposed to elevated temperatures Journal of Building Engineering 10.1016/j.jobe.2019.100871 (100871) (2019).
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Resistance of Alkali-activated Slag Cement Against Sodium
Resistance of Alkali-activated Slag Cement Against Sodium Sulfate A. Allahverdi 1 2 H. Hashemi 1 The water-to-cement ratio for Portland cement mortar and paste specimens ZHUH ¿ HG DW DQG UHVSHFWLYHO Specimens of Portland cements were prepared in
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