Stable Time for Microstructural Parameters of Fly-Ash Concrete …
The reference time, t0 for fly ash concrete is proposed according to the concrete maturity indicated by the content of calcium hydroxide (CH) in cement paste blended with fly ash.
Influence of coir fiber reinforcement on shear strength parameters …
During past few decades, due to environmental and economic issues, Fly ash has got a prominence role as an alternative construction material [15]. The benefits of utilization of Fly ash as a construction material are still to be addressed. It is observed that, the geotechnical behaviour of Fly ash mixed with fibers was significant [8].
Use and effect of fly ash in concrete: A literature review
On the other hand, several properties of the incorporation of fly ash in different types of concrete, such as polymeric co ncrete, were recognized, where the percen tage of replacem ent fluctuates
Systematic Multiscale Models to Predict the Effect of High-Volume Fly
Mohammed et al. [79] proposed linear regression model to predict the compressive strength of high-volume fly ash concrete using factors such as w/b ratio, cutting time and fly ash content and ...
Influence of coir fiber reinforcement on shear strength parameters …
The results of the research indicate that water cement ratio (w/c) 0.4, polymer concrete ratio (P/C) 15% and rice husk fly ash portland cement ratio 15% gives the best performance.
Engineering Properties of Self-compacting Concrete
Ordinary Portland Cement 53 grade was used as per IS-8112 (1989) and specific gravity of cement was found to be 3.15. Class C Fly ash a mineral admixture procured from Power Plant is replaced in terms of percentage to cement, the specific gravity of fly ash was 2.12.
Multi-Objective Optimization of Sustainable …
Substantial research has been conducted to evaluate using various supplementary cementitious materials (SCMs) such as fly ash (FA), slag, metakaolin, rice husk ash (RHA), silica fume (SF), and natural …
A Study on Strength Parameters of Partially Replacement of Cement …
The compressive strength of fly ash concrete at 30% replacement after 28 days is 36.9 N/mm2 which is lesser than conventional concrete by 6.81%.Activated fly ash concrete has higher compressive strength compared to conventional & fly ash concrete. The compressive strength increases by 6.16% & 12.5% higher than CVC & Fly ash …
Fly Ash-Based Eco-Efficient Concretes: A Comprehensive …
Among different SCMs used in concrete production, fly ash (FA) an industrial by-product of mineral coal burning made up from fine fuel particles found from flue gases and coal-fired boilers, and it can be employed as an SCM to minimize cement usage in concrete for lowering CO 2 emissions [8,11,12,13,14,15]. It was reported that more …
Optimization of Fly Ash in Concrete: High Lime Fly Ash …
concrete; parameters that greatly affect the durability and strength of concrete. ... gained if the concrete industry can further optimize its use in concrete. Several types of fly ash are produced depending on the type of coal and the coal combustion process. It is a pozzolanic material and has been classified into two classes, F and C, based on
Chapter 3
Fly ash use in concrete improves the workability of plastic concrete, and the strength and durability of hardened concrete. Fly ash use is also cost effective. When fly ash is added to concrete, the amount of portland cement may be reduced. Benefits to Fresh Concrete. Generally, fly ash benefits fresh concrete by reducing the mixing …
Compressive strength prediction and low-carbon …
Portland cement concrete (PCC) is a major contributor to human-made CO2 emissions. To address this environmental impact, fly ash geopolymer concrete …
Fly Ash-Based Eco-Efficient Concretes: A Comprehensive …
Abstract. Development of sustainable concrete as an alternative to conventional concrete helps in reducing carbon dioxide footprint associated with the …
Rheological Behavior and Strength …
A cement mortar mix with a cement-to-sand ratio of 1:3 was investigated, including fly ash replacement from 10% to 40%, and GGBS from 10% to 70% of the weight of the cement. A suitable blend …
Strength Characterization of Fiber Reinforced Cement–Fly Ash …
The experimental investigation for the characterization of strength of fiber reinforced cement–fly ash mixes is presented in this paper. The objective of the investigation was to quantify the ...
Research Article Effect of silica fume and basalt fibers on …
of magnesium phosphate cement incorporating fly ash ... on the fracture parameters of magnesium phosphate cement (MPC). MPC mortar mixtures were prepared with different SF (0, 5, 10%) and BF ...
A study on the synthesis and performance evaluation of fly ash …
This study investigated the workability of concrete mixes incorporating ordinary Portland cement, fly ash, and alccofine in varying proportions, utilizing slump tests as the primary evaluation method.
Improvement of Strength Parameters of …
The use of some mineral additives as substitutes for the cement, e.g., the siliceous fly ashes (FAs), has a positive effect on reducing the energy used in cement production.
Optimum mix parameters of high-strength self-compacting concrete …
Combined with the characteristics of concrete used in Chinese railway, high-strength SCC (Grade C60–C80) has been studied since 1995. In this paper, high-strength SCC containing ultrapulverized fly ash (UPFA) was studied, and the assessment of workability, main mix parameters, and properties of this concrete are presented. 2. …
Compressive strength analysis of fly ash-based geopolymer concrete …
1. Introduction. Cement is one of the most widely used building materials on a global scale. It is primarily used in concrete manufacturing [1, 2].Furthermore, cement production is a significant source of carbon dioxide (CO 2), posing a significant environmental risk [3].One ton of cement produces between 0.6 and 1 ton of CO 2 [4], …
Examining the endpoint impacts, challenges, and …
Although several literatures have documented the advantages of fly ash 8,34,35, there exists a gap in understanding why the utilization of fly ash in mass …
Improvement of Strength Parameters of Cement Matrix …
Modification of a cement matrix using additives and admixtures has been a common practice for many years. The use of some mineral additives as substitutes for the cement, e.g., the siliceous fly ashes (FAs), has a positive effect on reducing the energy used in cement production. On the other hand, such activities may have negative …
Benefits and Detrimental Effects of Fly Ash in Concrete
The replacement or substitute of Portland cement with fly ash is considered by its promoters to reduce the greenhouse gas "footprint" of concrete, as the production of one ton of Portland cement produces approximately one ton of carbon dioxide (CO 2) as compared to zero CO 2 being produced using existing fly ash.
A model to characterize the effect of particle size of fly ash …
Fly ash has become an important component of concrete as supplementary cementitious material with the development of concrete technology. To make use of fly ash efficiently, four types of fly ash with particle size distributions that are in conformity with four functions, namely, S.Tsivilis, Andersen, Normal and F distribution, respectively, were prepared.
Fly ash for sustainable construction: A review of fly ash …
Fly ash can improve mechanical and durability parameters of concrete. • Fly ash concrete can perform better against chloride, sulfate and acid attacks and can improve corrosion resistance. ... According to several studies, the 28 day-FS differ …
A study on the synthesis and performance evaluation of fly …
The study of the properties of fly ash based concrete composites with various chemical admixtures. Procedia Eng. 42, 1863–1872 (2012). Article Google Scholar
A statistical investigation of different parameters influencing
This paper statistically investigates the influence of parameter, namely curing temperature, molarity, NaOH/Na 2 SiO 3, and activator-to-fly ash ratio on the compressive strength of low calcium fly ash-based geopolymer concrete.This paper also investigates the effect of delay time prior to curing on the compressive strength of …
A Study on Strength Parameters of Partially Replacement of Cement …
The compressive strength of fly ash concrete at 30% replacement after 28 days is 36.9 N/mm2 which is lesser than conventional concrete by 6.81%.Activated fly ash concrete has higher compressive strength compared to conventional & fly ash concrete. The compressive strength increases by 6.16% & 12.5% higher than CVC & Fly ash concrete.
Influence of various parameters on strength and absorption …
The paper presents the influence of various parameters on compressive strength and water absorption properties of fly ash based geopolymer concrete mixtures optimized by Taguchi method.A total of sixteen mixtures were evaluated considering the effect of inclusion of ordinary Portland cement as fly ash replacement, different …
Use and effect of fly ash in concrete: A literature …
The methodologies and designs used to obtain the optimum percentages of 5, 10, and 15% were reviewed, analyzing mainly the results obtained when fly ash is used in concrete. Finally, according to ...