Geopolymerization, a fairly new technology based on a very old principle, has emerged during the last few years as a possible solution to some waste stabilization and solidification problems. Some commercial successes have been achieved, although the technique remains fairly unknown as well as seemingly unpopular. It has been shown that most waste materials containing sources …
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The results indicate that the shrinkage of geopolymers is strongly dependent on curing temperature and liquid-to-ash ratio. The increase in shrinkage is associated with the low …
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C. Ridtirud et al., Factors affecting the shrinkage of fly ash geopolymers 101 good foundation for future research on the shrinkage of ... shrinkage performance in terms of liquid-to-fly ash ratio
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gate some of the factors that affect the durability of lime-fly ash-aggregate mixtures. More specifically, the effects of six major factors on durability were studied: 1. Aggregate gradation, 2. Lime plus fly ash content, 3. Ratio of lime plus fly ash to total fines, 4. Increased curing time, 5. Fly ash content, and 6. Saturation.
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It can be seen from Fig. 1 that the fly ash particles were in a spherical shape. The results of JL-6000 laser particle size analyzer showed that the average particle size of fly ash was 13.5 micron. The particle size …
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This paper attempts to identify the effect of source material variation of geopolymer concrete, particularly which use fly ash as source material and focuses on the variation of its characteristics and the effects to properties of concrete.
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The performance of training, validation, and test sets shows a high correlation ... Exploring the major factors affecting fly-ash concrete carbonation using artificial neural network ...
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Geo-polymerization mechanism and factors affecting it in Metakaolin-slag-fly ash blended concrete A D Sandeep Kumar1, Dinesh Singh2, V Srinivasa Reddy3, Kaveli Jagannath Reddy4 1Research Scholar of Civil Engineering, K L University, Andhra Pradesh, India. 2Department of Civil Engineering, K L University, Andhra Pradesh, India 3Professor, Department of Civil …
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Alkali activated Fly Ash/Slag (AAFS), a newly evolved type of alkali-activated materials (AAMs), was studied for the sake of developing a more sustainable alternative to Portland cement (PC) which ...
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The compressive strength tests also revealed a wide range of performance from 40 ... Table 2 presents a summary of the factors, inherent to the fly ash, that affect the mechanical strength of the resultant geopolymer. Values 1–5 were assigned to the fly ashes for each factor, 1 indicates the highest rank with respect to the value of a ...
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Several factors affecting the reactivity of fly ash (FA) as a precursor for geopolymer concrete have been investigated. These include physical and chemical properties of various FA sources ...
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Das BB, Pandey SP (2011) Influence of fineness of fly ash on the carbonation and electrical conductivity of concrete. J Mater Civ Eng 23(9):1365---1368 Google Scholar Cross Ref; Zhang P, Li Q (2013) Effect of fly ash on durability of high performance concrete composites. Res J Appl Sci Eng Technol 6(1):7---12 Google Scholar Cross Ref
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Several factors affecting the reactivity of fly ash (FA) as a precursor for geopolymer concrete have been investigated. These include physical and chemical properties of various FA sources, inclusion of ground granulated blast furnace slag (ggbs), chemical activator dosages and curing temperature.
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The American University in Cairo The School of Sciences and Engineering Construction Engineering Department "FACTORS AFFECTING THE FIRE RESISTANCE PROPERTIES OF FLY ASH CONCRETE" BY Hisham Tarek Mohamed Hafez B.Sc. in construction engineering, AUC A thesis submitted in a partial fulfilment of the requirements for the degree of Masters of …
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For this reason, this study compiled information on the different variables that affect the compressive strength of geopolymers, such as Si/Al ratio, curing temperature and time, type and ...
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The study has investigated the influence of the physical and chemical properties of five types of fly ash on the performance of high volume blended fly ash cementitious (HFC) …
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Fly ash-based geopolymer is expected to be used as a kind of novel green cement. Fly ash-based geopolymer can be used as a class of materials to adsorb and immobilize toxic or radioactive metals. The factors affecting the performances of fly ash-based geopolymer concrete, in particular aggregate, are discussed.
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There are many factors affecting the characteristics of cement-fly ash slurry in practical engineering. Thus, this paper studies the influence of multifactors on the fluid …
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Fly ash is a waste from coal burning, that are generated with fluctuation both in its physical and chemical characteristics. This characteristics of fly ash when used in the making of geopolymer concrete will greatly affect the final products obtained. The pH value measured in fly ash, according previous research, can influence the setting time of geopolymer and fly ash with high …
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The performance parameters of fly ash are shown in Table 3. ... The existing concrete creep models cannot accurately predict the creep of fly ash concrete. The main factors affecting the creep of concrete include the elastic modulus, load duration, and the type of cement, etc. After adding fly ash, it is necessary to modify the concrete creep ...
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The physical and chemical requirements of slag and fly ash for the stable performance of AAM are summarized. ... BFS/FA-AAM are studied. • The factors affecting the strength of BFS-AAM, FA-AAM, BFS/FA-AAM are explored and influencing mechanisms are discussed. ... Four factors have proved to be the control factors of reaction and strength of ...
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A Comprehensive Study on the Factors Affecting the Workability and Mechanical Properties of Ambient Cured Fly Ash and Slag Based Geopolymer Concrete ... However, FAGPC specimens ( fly ash) demonstrated lower mechanical performance as compared to OPC specimens due to low reactivity of fly ash particles, low amount of calcium and more porous ...
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This paper presents some factors affecting geopolymerization of low calcium fly ash for geopolymeric matrices. Low calcium fly ash samples were collected from two different coal-powered facilities: an Indonesian fertilizer plant and a Japanese power plant. Several series of tests were conducted using various ratios of fly ash to activator as well as ratios of activators to …
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According to the recent research results, the factors affecting the performance of alkali-activated slag–fly ash composite cementation systems are mainly concentrated in four …
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This paper examines some of the factors which influence the drying shrinkage of alkali-activated mortars containing slag and fly ash such as slag/fly ash proportion, curing …
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The chemical, physical, and mineralogical properties of a suite of pozzolans used to make AAB are analysed including fly ash, slag, metakaolin, silica fume, rice husk ash, palm oil fuel ash, and ...
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In this study, the effect of fly ash characteristics, the content of the fly ash and mix proportion of the Fly Ash-Based Geopolymer Concrete (FBGC) on the bond strength between the FBGC and steel reinforcement were examined. ... Thus, understanding the factors that affect the 3 68 performance of the FBGC with steel reinforcement is necessary to ...
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Several factors affecting the reactivity of fly ash (FA) as a precursor for geopolymer concrete have been investigated. ... This study investigated the effect of increasing slag content and activator dosage on the sulfuric acid resistance of fly ash GP binders. Their performance was also compared with that of neat PC mixes using various ...
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Owens3 reported that the major factor influencing the effects of fly ash on the workability of concrete is the proportion of coarse material (>45μm) in the ash. A comprehensive study by …
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This review aims to summarize the performance of fly ash based Zero Cement Concrete ( FA − ZCC ) according to the main parameters: Fly ash types (ASTM FA Class F and Class C ), precursor ...
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