Mechanical and durability studies on high‐volume fly‐ash concrete

Kumar, Manish; Sinha, Anand Kumar; Kujur, Jitu

doi:10.1002/suco.202000020

Cited by 30 publications

(14 citation statements)

References 21 publications

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“…SEM analysis in the study by Barbara et al [30] distinctly showed intermixing of Fe and Al-Si mineral phase along with the predominance Ca non-silicate materials in the case of class F fly ash as pozzolanic material with low Ca. About general chemical and physical characteristics and elemental composition of this fly ash type, Kumar et al [34] carried out SEM analysis on OPC and FA to explore the morphology of concrete specimens. SEM results demonstrated that OPC particles are more irregular compared to FA particles, which are in spherical shapes, as shown in Figure 2.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

An Experimental Study of the Effects of Low-Calcium Fly Ash on Type II Concrete

Tee

Mostofizadeh

2021

Ceramics

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In this study, the compressive strength and the permeation properties of fly ash-based Geopolymer were experimentally investigated. Type 2 Portland cement (T2PC) was partially or entirely replaced with 0, 10, 20, 30, 50, 70, and 100% of fly ash (FA). The laboratory tests were conducted for compressive strength at 7, 28, and 90 days, and permeation properties such as water absorption at 7 and 28 days. The main goal was to produce eco-friendly concrete with high strength and low permeability through blending cementitious materials including low Calcium (Ca) (T2PC and FA) for protecting concrete against sulphate attacks and other chemically destructive compounds in the environment. This study focused on the effectiveness of the curing period, combinations of chemical activators by varying the molarity of alkaline solutions between 4.16 and 12.96 M and keeping the sodium silicate (SS) to sodium hydroxide (SH) by the weight ratio of 2.5. Lab observations from this study demonstrated that the compressive strength was enhanced with the increment in fly ash content at all ages, with optimum being at 20% as the replacement of T2PC.

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Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

An Experimental Study of the Effects of Low-Calcium Fly Ash on Type II Concrete

Tee

Mostofizadeh

2021

Ceramics

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“…It is an extremely popular mineral mixture that is only available in states with coal-burning facilities. In this study [3], concrete specimens were made with various mix ratios (0-70 percent) instead of normal Portland cement using FA. The steady increase in compressive strength and pulse velocity over 365 days is reflected in the high-volume FA concrete.…”

Section: Introductionmentioning

confidence: 99%

Compressive, flexural and splitting strength of fly ash and silica fume concrete

Shmlls

Bozsaky

Horváth

2022

Pollack

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Cement replacement materials are commonly used in concrete technology. Several researchers have examined high-performance concrete after adding mineral admixtures to it, but further studies are still needed to provide the optimum dosage of these materials for instance fly ash and silica fume. This study compares three types of concrete and the mechanical properties (compressive strength, flexural strength, and splitting tensile) of these types at the age of 28 and 90 days. The test results designate that adding the mineral admixtures commonly affects the mechanical properties of all the tested types. However, silica fume is more operative than fly ash. Furthermore, adding the fly ash and silica fume in the same concrete type slightly improves the mechanical properties.

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“…The usage of fly ash to partially replace cement in the total mix is capable of improving the segregation and the strength of concrete [21,22]. Substituting cement with fly ash delivers impactful economic and environmental benefits, as less manufacturing of cement reduces the cost and the carbon footprint to the environment [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Silica Fume Modified High-Volume Fly Ash Rubberized Self-Compacting Concrete

et al. 2021

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The existing form of self-compacting concrete (SCC) comprises of a large amount of powdered and fine materials. In this study, a part of the cementitious material was replaced with constant high-volume fly ash, and a portion of fine aggregates was substituted by crumb rubber (CR). Besides that, silica fume (SF) was added, with the hope that by implementing a new type of nanomaterial, the loss in mechanical strength due to previous modifications such as rubberization and replacement will be prevented. Two variables were found to influence the constituent/component in the mix design: SF and CR. The proportion of SF varies from 0% to 10%, while that of CR from 0% to 30% by volume of the total river sand, where 55% of cement was replaced by the fly ash. A total of 13 rubberized SCC samples with CR and SF as controlling variables were made, and their design mix was produced by a Design of Experiment (DOE) under the Response Surface Methodology (RSM). The results reveal a slight increase in the mechanical properties with the addition of SF. The theoretical mathematical models and equation for each different mechanical strength were also developed after incorporating the experimental results into the software.

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Mechanical and durability studies on high‐volume fly‐ash concrete

Cited by 30 publications

References 21 publications

An Experimental Study of the Effects of Low-Calcium Fly Ash on Type II Concrete

An Experimental Study of the Effects of Low-Calcium Fly Ash on Type II Concrete

Compressive, flexural and splitting strength of fly ash and silica fume concrete

Mechanical Properties of Silica Fume Modified High-Volume Fly Ash Rubberized Self-Compacting Concrete

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