An Experimental Study of High Strength-High Volume Fly Ash Concrete for Sustainable Construction Industry

Kate, Gunavant K.; Thakare, Sunil B.

doi:10.1088/1757-899x/225/1/012247

Cited by 9 publications

(10 citation statements)

References 1 publication

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“…The silica and alumina in both classes of fly ash in the presence of lime and water form a cementitious compound (C-S-H), the same product of cement hydration. Fly ash is the most globally generated and widely used SCM because of its abundance, compatibility with cement and relatively low cost [14,58]. Its availability also increases with the world's consumption of energy [4].…”

Section: Fly Ash As An Scmmentioning

confidence: 99%

“…The slow rate of pozzolanic reaction causes a slower strength development in fly ash concrete but significant strength gain is usually observed from 28 to 90 days [14]. Usually, replacement levels greater than 20% affects the hydration mechanism causing a slower strength gain; this negatively affects the compressive, split tensile and flexural strengths [58].…”

Section: Fly Ash As An Scmmentioning

confidence: 99%

“…With concrete as the most used construction material [14], there is an ongoing search for environmentally friendly materials that can effectively substitute the constituents of concrete without compromising its strength and durability. This search has led to the use of various agricultural, industrial and municipal waste materials in concrete production as either a supplementary cementitious material (SCM) or an alternative aggregate [10,15,16].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High volume Portland cement replacement: A review

Nwankwo

Bamigboye

Davies

et al. 2020

Construction and Building Materials

126

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Section: Fly Ash As An Scmmentioning

confidence: 99%

Section: Fly Ash As An Scmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High volume Portland cement replacement: A review

Nwankwo

Bamigboye

Davies

et al. 2020

Construction and Building Materials

126

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show abstract

“…The process involved is a combination of improved compaction using special additives, improved aggregate matrix bonding and reduced porosity. It is necessary to use supplementary cementing material to replace a large amount of cement in concrete structures, and the most effective supplementary cementing material in the world is fly ash [2]. Fly ash concrete, as an environmentally friendly and economical building material, has a wide range of application prospects.…”

Section: Introductionmentioning

confidence: 99%

Sustainability study of mix design of high-strength concrete based on fly ash

2023

ACE

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Concrete is the most widely used building material in the construction of buildings, bridges, highways, and other infrastructure. With the spread of environmental preservation ideas and technological improvement, high-strength concrete materials and their sustainable hybrid design methods have been developed. A sustainable mix design approach for high-strength concrete (HSC) is critical for the construction industry as it is one of the major emitters of CO2 emissions worldwide. Fly ash concrete is an environmentally friendly, economical and sustainable building material. This paper analyzes the sustainable mixed design method of fly ash concrete by combining past scholars' research and practical experience. By analyzing the properties of fly ash, theoretical principles, and some sustainable mixed design methods, the properties (such as durability, compressive strength, etc.) of fly ash HSC are studied. It is found that the properties of fly ash HSC and traditional HSC are similar or even stronger in some aspects, which has a good improvement on the compatibility and durability of concrete. In the future, with the progress of science and technology, people will further study fly ash and HSC, and the application of fly ash in HSC will certainly get greater development, and achieve green development and sustainable development while meeting the strength of concrete.

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“…Mineral admixtures have an important influence on the working properties of cement mortar [8,9], mechanical properties [10,11], and durability [12][13][14]. At present, the mineral admixtures that are widely used are mainly fly ash [15], slag [16], silica fume [17], and limestone [18], and research on coal gangue is rare.…”

Section: Introductionmentioning

confidence: 99%

Mechanism on Activation of Coal Gangue Admixture

Chen

Guan

Zhu

et al. 2021

Advances in Civil Engineering

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Coal gangue, an industrial waste, is rich in silicon and aluminum phase and may be used as a mineral admixture in concrete after moderately stimulating activity, allowing for efficient solid waste utilization. This study used a mortar strength and activity evaluation method to investigate single or compound activation methods to find the optimum activation method of coal gangue. FLIR, XRD, and SEM were used to investigate the activation mechanism of different modes, providing a theoretical foundation for the study of coal gangue as a concrete admixture. Results showed that mechanical ball milling, microwave, and chemical activator could activate coal gangue, and the composite activation effect was the best. The fineness of the coal gangue powder was more than 300 mesh, according to the optimal compounding method. Accordingly, the particle surface was smooth, the internal defects were reduced, and the microwave irradiation temperature was 700°C–800°C, causing the coal gangue particles to form a bonding surface and gradually agglutinate and densify. Meanwhile, the layered structure of kaolin minerals was destroyed, and a significant amount of glassy active SiO2 and Al2O3 was produced, enhancing the gel ability and activity of coal gangue. Finally, 8% Ca(OH)2 was added in the production of mortar specimens, which increased the alkalinity of the slurry, stimulated the rapid cracking and secondary hydration of the coal gangue, and enhanced the strength of mortar. At this time, the activity rate of coal gangue powder reached the highest, which was 90.5%.

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An Experimental Study of High Strength-High Volume Fly Ash Concrete for Sustainable Construction Industry

Cited by 9 publications

References 1 publication

High volume Portland cement replacement: A review

High volume Portland cement replacement: A review

Sustainability study of mix design of high-strength concrete based on fly ash

Mechanism on Activation of Coal Gangue Admixture

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