Effects of cork granules and hollow fly ash cenospheres on the
To ensure that the 28-day strength of the sound insulation mortar prepared with RFA meets the local requirement for floor mortar strength (≥5 MPa), a mix proportion with a strength of 7.5 MPa was designed according to the JGJ/T 98 standard [31]. RFA was replaced at 0 %, 7 %, 15 %, 25 %, 35 %, 45 %, and 50 % by volume with different damping ...
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Strength development of concrete with fly ash addition
Keywords: concrete, fly ash, compressive strength development, pozzolanic reaction, statistical methods, mathe-matical model. 1. Introduction The incorporation of industrial by-products such as ... taining 75 % of cement and 25 % of fly ash, and mortar without addition. The results of pozzolanic activity are presented in Tables 2, 3.
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Research on the Preparation of Dry Mixed Mortar Using Waste
This study investigated the effect of water-washed municipal solid waste incineration fly ash (MSWI FA) as an admixture on the performance of dry mixed mortar and used X-ray diffraction (XRD) and scanning electron microscope (SEM) detection methods to conduct microscopic analysis. The experiment investigated the effects of the amount and water content …
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Strength development of mortar and concrete containing fly …
In this paper, a critical review on the strength development of concrete as influenced by the use of FA as a supplement of cement in concrete has been presented on the basis of available …
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Strength, pore characteristics, and characterization of fly ash-slag
The performance of precursor materials has a significant impact on the basic mechanical strength of geopolymer mortar. Fly ash is one of the most widely used raw materials among the various precursor materials for the preparation of geopolymer mortar [11].In the past two decades, research on geopolymer mortar has been focused on developing ordinary and …
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The Early Age Strength Improvement of the High Volume Fly Ash Mortar
In the last decade, the use of Fly ash as replacement to improve the strength and performance of the cement has become a part of mortar and concrete manufacturing. When the used amount of fly ash ranges from 20 to 25%, the proprieties of concrete and mortars such as strength and durability are improved, which also reduce the Portland cement ...
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Effects of chemical composition of fly ash on compressive strength of fly ash cement mortar
Fly ash cement mortar was made by replacing 25 wt% of cement with 16 fly ash types. The compressive strengths of these specimens were evaluated. The compressive …
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Optimising Compressive Strength: Investigating the Ideal …
Mortar was prepared with fly ash–GGBS binder mix at various proportions (F75G25, F50G50, F25G75, F00G100), activated with sodium silicate solution, maintaining a W/BS ratio of 0.3 and cured at ambient temperature a Day 7 and day 28 compressive strength of mortar mix activated with sodium silicate (@ 50% w/w of binder solids) with or without 2 ...
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Effect of immersing geopolymer slag-fly ash mortar in sulfuric acid …
The minimum splitting tensile strength was 7% of the corresponding 28-day compressive strength, while the maximum tensile strength was 9.6% of the 28-day strength for air-cured mortar samples with fly ash conent ranging from …
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Effect the Local Fly Ash on Cement Mortar Properties
The addition of 10% fly ash in cement as an optimum dosage increased the compressive strength by 21.9%, 17.4%, and 80.2%, however, increase in fly ash dosage (25%) led to a decrease in mortar ...
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INFLUENCE OF FLY ASH REPLACEMENT ON STRENGTH …
the strength was 17.6MPa at 7 days for reference mortar (M0) and it decreased to 10.4MPa for 25% fly ash mortar (M5). The strength decrease was as low as 10.2% for 5% fly ash (M1) and it was as ...
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Effect the Local Fly Ash on Cement Mortar Properties
replacement of fly ash mortar which is 43.1MPa. The 5% replacement of fly ash mortar was the second highest of average compressive strength that is 41.1MPa while the standard mortar gave an average strength of 39.7MPa. Both 15%and 20% replacement of fly ash mortars gave average compressive strengths of 36.7 and 32.7MPa respectively. It
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Study of Fly Ash Mortar: Compressive Strength
The 28th day's compressive strength of the cement-fly-ash-mortar containing 70% cement and 30 % fly ash was 37.53N/sq.mm, which corresponded to 93.7% of the Compressive strength(40.06N/sq.mm) attained by the reference mortar which contained 100.0 % of cement. and zero percent It was inferred that fly ash can be added at 30% weight of cement ...
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Effects of the physicochemical properties of fly ash on the …
This study investigated the effect of the physicochemical properties of fly ash, including the particle sizes and chemical composition of the amorphous phase, on the compressive strength of high-volume fly ash mortars in which 50 vol.% of ordinary Portland cement was replaced with fly ash.The enhancement in the compressive strength of the high …
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Effect of Incorporation of Geopolymer Fly Ash Sand in Mortar and
The fly ash use in the present investigation was procured locally from a power plant near Ahmedabad. Table 1 summarizes the physical and chemical characteristics of fly ash. It has low calcium content and therefore is classified as low calcium class F type fly ash (IS3812-Part 1) [].The NaOH and Na 2 SiO 3 used for the study were of industrial grade, so that results can be …
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(PDF) Contribution of fly ash to mortar strength …
This paper evaluates the effect of Ultrafine Fly Ash (UFFA) and nanoSilica (NS) on compressive strength of high volume fly ash (HVFA) mortar at 7 days and 28 days.
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Fresh properties and compressive strength of high calcium alkali
The compressive strength of the ambient curing regime specimens were ranged from 6.75 to 20.69 MPa for LB fly ash-based mortar and from 8.03 to 20.80 MPa for KC fly ash-based mortar. While the compressive strength of the oven curing regime specimens ranged from 22.46 to 41.10 MPa for LB fly ash-based mortar and from 20.08 to 40.23 MPa for KC ...
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Development of high-strength geopolymer mortar based on fly ash …
Optimizing slag content boosts the compressive strength of fly ash-based geopolymer mortar, reaching up to 88.13 MPa under ambient curing conditions. An optimal amount of slag also promotes gel formation during polymerization, improving the internal pore structure. Furthermore, the content of reaction products correlates more strongly with ...
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Effect of Replacing Fine Aggregate with Fly Ash on the …
The strength of the fly ash fine aggregate mortar first increased and then decreased with increasing fly ash substitution rate; however, it was higher than that of the benchmark group. When 80% of the fine aggregate was replaced with fly ash, the compressive strength of the mortar reached its maximum at various ages, with 56.2 MPa and 62.9 MPa ...
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Compressive strength, flexural strength, and durability of high …
A possible step toward creating sustainable concrete is using fly ash as a cement substitute material. The study work discussed in this paper aims to generate helpful information about the strength and durability of concrete containing a significant amount of fly ash. Laboratory tests were done on high-volume fly ash concrete (HVFAC) to examine its compressive …
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Contribution of Fly ash to the properties of Mortar and …
Fly ash is a by-product material obtained from the combustion of coal. It is used as pozzolanic material in mortar and concrete, and has demonstrated significant influence in improving the...
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Analyzing the influence of manufactured sand and fly …
Wang, X. Y. Analysis of hydration and strength optimization of cement-fly ash-limestone ternary blended concrete. Constr. Build. Mater. 166, 130–140 (2018).
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GEOPOLYMER MORTAR WITH ALKALIACTIVATED FLY ASH AS THE BASE: STRENGTH
The findings suggest that various industrial waste by-products can be effectively utilized in geopolymer mortar production. The strength of fly ash-based geopolymer is primarily influenced by mix compositions, including alumina and silica content, as well as the concentration of alkali activator. Processing parameters such as curing period and ...
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STUDY ON STRENGTH PAREMETER OF CEMENT …
5. Fly ash For this study Karnataka Power Transmission Corporation Limited (KPTCL) Fly Ash obtain from Raichur, Karnataka. Table 4: Replacement for Cement and Sand S. No. …
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Interfacial Behavior of Slag, Fly Ash, and Red Mud-Based
The results indicated that the compressive strength of slag-fly ash-red mud-based geopolymer mortar under different mixing ratio conditions was consistently superior to that of cement mortar, where the optimum mixing ratio for the geopolymer mortar was S33F33R33. ... it can be speculated that geopolymer mortar prepared from slag or fly ash can ...
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Enhancing Compressive Strength of Very High Volume Fly Ash …
In Fig. 6, the compressive strength of VHVFA mortar (80% fly ash, 20% cement) using Class F and Class C fly ash is shown for 7, 14, and 28 days. The series of mortar mixtures was activated with NaOH solutions of 0.01, 0.1, 0.3, 0.5 and 1 M as chemical activators, and with water only. The use of NaOH solution as an activator with different low ...
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Development of high-strength geopolymer mortar based on fly …
Optimizing slag content boosts the compressive strength of fly ash-based geopolymer mortar, reaching up to 88.13 MPa under ambient curing conditions. An optimal …
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Strength and Setting Times of Low Calcium Fly Ash-based Geopolymer Mortar
The compressive strength values of the fly ash and calcium carbide waste on self-compacting concrete samples in this study were at the range of 28 MPa to 29 MPa, still within the SNI 2847-2019 ...
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A Study on Reactive Ultra-Fine Fly Ash and Sulfoaluminate …
The purpose of this study is to find appropriate mixtures for self-leveling mortar that meet the fluidity requirements without displaying segregation by using a combination of two types of cement (Type I Portland cement and sulfoaluminate cement (SAC)) with reactive ultra-fine fly ash (RUFA). Unlike the fly ash, RUFA has a strong strength activity index and exhibits …
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