Fly ash pellets :A replacement of coarse aggregate (original) (raw)
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Properties of Fly Ash Aggregate – An Alternative to Natural Aggregates-An Experimental Study
In this paper details of experimental studies carried out on fly ash aggregates as a replacement to stone aggregates has been presented, these aggregates are economical and environmental friendly. The artificial fly ash aggregates are manufactured by using ordinary mixer, in three different proportions of cement and fly ash, they are 12.5:87.5, 15:85, and 17.5:82.5 in the form of pellets. the experiments conducted are Grain size distribution, Specific gravity, absorption, impact value, crushing value, fineness modulus of three different proportions of fly ash aggregate as per the Indian standards and the results are comparing with natural aggregates. The 17.5:82.5 proportions aggregates give good strength properties, fly ash aggregates is a good alternative for civil engineering works.
Properties of Fly Ash Aggregate âÂÂAnAlternative to Natural Aggregates- AnExperimental Study
International Journal of Innovative Research in Science, Engineering and Technology, 2015
In this paper details of experimental studies carried out on fly ash aggregates as a replacement to stone aggregates has been presented, these aggregates are economical and environmental friendly. The artificial fly ash aggregates are manufactured by using ordinary mixer, in three different proportions of cement and fly ash, they are 12.5:87.5, 15:85, and 17.5:82.5 in the form of pellets. the experiments conducted are Grain size distribution, Specific gravity, absorption, impact value, crushing value, fineness modulus of three different proportions of fly ash aggregate as per the Indian standards and the results are comparing with natural aggregates. The 17.5:82.5 proportions aggregates give good strength properties, fly ash aggregates is a good alternative for civil engineering works.
Utilization of fly ash by pelletization process; theory, application areas and research results
Resources, Conservation and Recycling, 2000
Although pelletization process is a world wide known technique in the production of artificial aggregates, it has not been widely used in construction sector. The 1985 figures show that overall pellet production for use as metallurgical product was 435 million tons and with respect to statistical figures that belong to 1989 the agglomerated product use in construction sector as lightweight aggregate was only 1.2 million tons. The reasons of low utilization of coal combustion by-products as lightweight aggregates in the construction sector are: -the availability of natural resource products and relatively higher costs of agglomeration process due to initial investments and -energy requiring curing procedures to obtain adequate strength for construction applications (e.g. steam curing and sintering). However, depending on the agglomerated materials' properties and process efficiency, artificial aggregates with adequate engineering performance may be produced by moisture treatment under atmospheric conditions. In this study, the engineering performance of moist cured fly ash pellets including the effect of lime and cement additions both for geotechnical application and concrete production purposes were investigated and the results obtained are quite satisfactory for the related design requirements.
Journal of Civil and Environmental Engineering, 2016
This research paper mainly focuses on the utilization of Class F-fly ash (by-product of power plant) for production of aggregates by different method. In the present study three different types of methods are adopted for preparation of aggregates. Cold bonding, autoclaving and sintering techniques are the very general technique used for preparation of the aggregates. Sodium hydroxide, Bentonite and Sodium silicate are used as a binder material during the pelletization process. The binder and fly ash proportions of 15: 85, 10: 90 and 17: 83 with water to cement ratio 0.3 are mixed to get the fly ash aggregates. Various mechanical properties of the aggregates such as crushing strength, impact test, abrasion test, specific gravity, water absorption, porosity were determined. The test results shows that the 7 days crushing strength and water absorption value of cold bonded aggregates 6.30 Mpa and 12.25% followed by autoclaving is 5.46 Mpa and 13.10% and sintering are 5.80 Mpa and 5.20% ...
Many researches have been carried out in the area of fly ash utilization in the past. It mainly concentrated on replacement of cement with fly ash but production of artificial aggregates with fly ash helps in utilizing large volume of ash in concrete. The world is much interested in this part recently due to this largescale utilization which also reduces environmental pollution and dwindling of natural resources. This paper mainly focuses on manufacturing process of light weight aggregates using pelletizer and curing has been done in cold bonded technique. The properties of these fly ash aggregates have been tested and compared with natural gravel and the study shows that cold bonded fly ash aggregates can be used as an aggregate replacement material in concrete. The strength property and density of concrete made with artificial fly ash aggregates and natural gravel were also studied which confirms that introduction of fly ash aggregates in concrete reduces the compressive strength but meets the required strength to be used as a structural material.
STUDY OF CONCRETE MADE USING FLY ASH AGGREGATES
Journal ijetrm , 2024
Many researchers have been executed within the vicinity of fly ash usage in the past. It in particularly concentrated on alternative of cement with fly ash but production of artificial aggregates with fly ash helps in using massive volumeof ash in concrete. The sector is lots interested in this part currently due to this massive scale utilization which additionally reduces environmental pollution and dwindling of natural assets.This paper particularly makes a specialty of manufacturing system of light weight aggregates the usage of pelletizer and curing has been carried out in cold bonded technique. The properties of these fly ash aggregates have been tested and in comparison, with natural gravel and the study shows at suggest that cold bonded fly ash aggregates may be used as an aggregate replacement materialin concrete. The strength property and density of concrete made with artificial fly ash aggregates and natural gravel have been additionally studied which confirms that creation of fly ash aggregates in concrete reduces the compressive strength however meets the desired strength for use as a structural material.
A Comparison Study between C and F Fly Ash Aggregates
Indian Journal of Natural Sciences, Vol.14 / Issue 77 /April / 2023, 2023
In the past, many researchers have researched the utilization of fly ash in concrete as the replacement of cement. It is focused on partial replacement of cement with appropriate amounts of fly ash, but utilization of fly ash aggregates in concrete as the replacement of natural aggregates helped in large volume in construction. In the present scenario, the researcher mostly interested to do the research in fly ash in wide range because the utilization of large amount of fly ash reduces the environmental pollution and abate of natural resources. Natural aggregates used in concrete as an inert filler give strength and provide bulk volume to the concrete. Natural crushed aggregates that used in concrete are mainly produced from exhausting the natural resources so that it requires substitute building materials. So it leds wide research on using the waste product as the preparation of aggregate. So fly ash use to prepare the aggregate which mix with cement in the ratio of 1:5 having the water cement ratio 0.3 to 0.5 in a standard atmospheric condition. In this paper it is mainly concentrated on fly ash aggregate that is light in weight and followed by 28 days of curing. The shape of these aggregates are round and approximately 10-20mm size. The tests have been conducted for the characteristic of the fly ash aggregates and the result suggested that these fly ash aggregates can be used as the replacement of natural coarse aggregate in concrete. The by-products like fly ash, bottomash, silica fumes, blast furnace slag that used to prepare the artificial lightweight aggregates. Fly ash are the byproducts of nearby power plants like NTPC, Talcher & IMFA power plant, Choudwar easily available with minimum cost. In the recent time, due to the cost effectiveness, the construction material are widely used in concrete for mass application.
Experimental Study on Lightweight Fly Ash Aggregate Concrete
Many researchers have been carried out in the area of fly ash utilization in the past. It mainly concentrated on replacement of cement with fly ash but production of artificial aggregates with fly ash helps in utilizing large volume of ash in concrete. The world is much in this part recently due to this large scale utilization which also reduces environmental Pollution and dwindling of natural resources. This paper mainly focuses on manufacturing Process of light weight aggregates using pelletizer and curing has been done in cold bonded Technique. The properties of these fly ash aggregates have been tested and compared with Natural gravel and the study shows that cold bonded fly ash aggregates can be used as an Aggregate replacement material in concrete. The strength property and density of concrete Made with artificial fly ash aggregates and natural gravel were also studied which confirms that introduction of fly ash aggregates in concrete reduces the compressive strength but meets the required strength to be used as a structural material.
Performance Study of Pelletized Aggregate Formed using Fly Ash
Irish Interdisciplinary Journal of Science & Research (IIJSR), 2021
The installation of Helical Confinement in the Compression Zone of reinforced High Strength Concrete beams is also investigated in this study. Helical Confinement is more effective than the rectangular ties, Compression Longitudinal reinforcement and steel fibers in increasing the strength and ductility of Confined Concrete. A total number of 3 Specimens were casted. The Pitch distance for helical confinement of two specimens is 50mm, 60mm and the Pitch distance for normal confinement is 50mm. The Specimen is of a size of 600mm X 300mm X 300mm. It contains of 8 mm dia bar as longitudinal reinforcement and 6mm dia bar as transverse reinforcement. M 40 and Fe 500 Grade steels were used. After 28 Days of Curing. The Specimens were taken out and allowed to dry and tested under universal testing machine of capacity 1000 KN. The Effect of Yield strength ductility, were studied from Stress – Strain and Load – Displacement Curves. This Study Concluded the Helical Reinforcement is an effective method for increasing the Strength and Ductility of Reinforcement High Strength Concrete Beam.