Effect of Crushing Process Parameters on Quality of Fly Ash Aggregates Produced After Crushing High Strength Fly Ash Blocks: A Laboratory Investigation

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Singh S.; Patel S.

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Journal Paper

Paper Information

Journal: International Journal of Engineering Year:2024 | Volume:37 | Issue:3 Page(s): 511-519

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Information Journal Paper

Title

Effect of Crushing Process Parameters on Quality of Fly Ash Aggregates Produced After Crushing High Strength Fly Ash Blocks: A Laboratory Investigation

Author(s)

Singh S. | Patel S. | Issue Writer Certificate

Keywords

Fly ash blocks

lightweight aggregate

Particle Shape

particle size

Crusher

Pavement

Abstract

The demand for aggregates for civil engineering construction is high in the market. The broad adoption of fly ash for producing fly ash aggregate is the best sustainable solution to fulfill aggregate demand and utilization of unused fly ash. Crushing is an essential step for producing angular-shaped aggregate. In this paper, an experimental study using a laboratory-scaled impact Crusher was carried out to investigate the effect of crushing process parameters (feed block size, Crusher speed and outlet sieve size) on the quality (particle size distribution, flakiness-elongation index and mechanical properties) of angular-shaped fly ash aggregates produced after crushing high-strength Fly ash blocks. particle size distribution and flakiness-elongation index were found to be changed with crushing parameters. Higher crushing speed resulted in small-size fly ash aggregates. Better particle size distribution of crushed fly ash aggregate was produced using a 60 mm outlet sieve compared to a 30 mm one. Well-graded fly ash aggregates with good Particle Shape (less flaky and less elongated) for the subbase layer of the road were obtained after crushing Fly ash blocks of one-third feed size in a laboratory-scaled impact Crusher at a crushing speed of 527 rpm and an outlet sieve of 60 mm. Mechanical properties (impact, crushing and abrasion values) of the fly ash aggregate were not much affected by crushing process parameters. The findings of this study will help in optimizing the crushing operation of the industrial impact Crusher to produce high-quality angular-shaped fly ash aggregate on a large scale.

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