Fly-Ash Pellets as a Replacement of Coarse Aggregate in Concrete Mixture (original) (raw)
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Effect and Behaviour of Light Weight Concrete Using Fly Ash Aggregate
Solid waste management is one of the most important techniques in today's global manufacturing scenario. This project is done in view of utilizing the waste in an efficient manner for constructive purpose under eco friendly environmental conditions. In this study, the fine and coarse aggregates were completely replaced by fly ash aggregates in fly ash concrete .a mix design was done for M20 grade of concrete by IS method. Ordinary Portland cement of 53 grade was selected and fly ash aggregates were prepared by mixing fly ash with cement and water. The properties of fly ash fine aggregates and fly ash coarse aggregates were studied. The aggregate crushing value and aggregate impact value of fly ash coarse aggregates were also studied. The cement and fly ash proportions of 15:85, 20:80 and 25:75 were tried with a suitable water content of 20% by total weight to get the fly ash aggregates. The concrete cubes, cylinders and beams were cast with the fly ash aggregates obtained from t...
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.
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.
ANALYSIS OF CONCRETE CONTAINING FLY ASH
In India, right now a lot of fly ash is created for the most part in warm force plants with a basic blow on condition and living life form. The utilization of fly ash in concrete can decrease the utilization of common assets and furthermore reduces the impact of contamination in condition. In late examinations, numerous analysts found that the utilization of extra cementitious materials likes fly ash in concrete is practical and solid. This examination is a piece of exploratory program did to contemplate the use of non-customary structure material (fly ash) for improvement of new materials and innovation. It is focused on materials which can satisfy the desires for the development business in various zones. In this examination, concrete has been supplanted by fly ash in like manner in the scope of 0% ,5%10%,15%, 20% by weight of concrete for M-30 grade in with .43 water cement proportion. The most significant mechanical property of concrete is compressive quality and it is assessed on 150X150X150 mm 3D squares by The compressive quality is acquired for multi day quality and results are investigations.
EFFECT ON MECHANICAL PROPERTIES OF CONCRETE USING FINE AGGREGATE AS PARTIAL REPLACEMENT WITH FLY ASH
IRJET, 2022
The use of flyash as a partial substitute in concrete mixtures is becoming more popular. Thermal power plants produce flyash, which is a waste product. The amount of fly ash generated by thermal power plants in India is estimated to be over 105 million tonnes per year, with a utilisation rate of less than 13%. The majority of fly ash generated is classified as Class F. The adoption of these materials would alleviate the current disposal issues that thermal power plants and industrial facilities confront. Some cement factories have begun to use fly ash in the production of 'Pozzolana Portland cement' in recent years, but overall utilisation remains low, and the majority of the fly ash is disposed of in landfills. Fly ash is widely utilised as a cement replacement, a concrete additive, and in the production of cement. Whereas concrete with fly ash as a partial replacement for cement has concerns with delayed early strength development, concrete with fly ash as a partial replacement for fine aggregate will not have this problem and will actually increase long-term strength. In this research, flyash is used as a sand replacement.
STUDY ON PROPERTIES OF CONCRETE WITH DIFFERENT LEVELS OF REPLACEMENT OF CEMENT BY FLY ASH
Concrete is a widely used construction material which contains four major ingredients such as coarse aggregate, fine aggregate, cement and water. The consumption of concrete is increasing every year with the number of developmental activities in infrastructure sector. The production of cement involves high energy consumption. Hence, there is a need to reduce the consumption of cement in concrete by using other alternate materials which posses cementitious properties. Fly ash is one such material which can be used as a replacement to cement in concrete. The present study aims in observing the variation of strength of different grades of concrete with different levels of fly ash replacement. The objective of the study is to re-establish the findings of earlier research done in the area of fly ash concrete. The grades of concrete selected for the study are M20, M35 and M50. The fly ash replacements considered for the study are 0%, 20%, 35% and 50% of cement by weight. The results of this study indicates that for M20 and M35 grades of concrete, there is increase in strength with 35% cement replacement by fly ash. For M50 grade of concrete, there is decrease in strength for all replacement levels selected for the study.
Experimental Investigation on Ductility in Fly Ash Aggregate Concrete
IJIRAE:: AM Publications,India, 2024
Aggregate in concrete is structural filler, which occupies the most of the volume of the concrete The composition, shape and size of the aggregate have significant impact on the workability, durability, strength, weight and shrinkage of the concrete. In recent period some of the aggregates are chemically active and also that certain aggregates exhibit chemical bond at the interface of aggregate and paste. Aggregate occupy 60-80% of the volume of concrete is considerable. The utilization of fly ash in concrete as partial replacement of cement is gaining immense importance today, mainly on account of the improvement in the long term durability of concrete combined with ecological benefits. Three grades of ordinary Portland cement (OPC) are 33,43 and 53 as classified by Bureau of Indian Standard (BIS) are commonly used in construction industry. The main variable investigated in this study is variation of fly ash dosage in 10%, 20%, 30% and 40%. The compressive strength, durability and shrinkage of concrete were mainly studied. The fly ash is collected in Mettur Thermal Power Plant. Then the cement and fly ash proportions of 12.5:87.5, 15:85 and 17.5:82.5 will be adopted to get fly ash aggregates. The particle size distribution, specific gravity, bulk density, impact test on aggregate will be conducted. For the plain concrete and fly ash aggregate concrete of beams (Plain concrete and RCC beams), cubes and cylinders will be cast. All the specimens will be cured in a curing tank. The Ductility test and compressive strength test will be conducted on these plain and fly ash aggregate concrete specimens.
International Journal of Structural Engineering
Fly ash is a fine grey powder consisting mostly of spherical, glassy particles produced as a by-product in coal-fired power stations having pozzolanic properties that exhibits supplementary cementitious material. This paper essentially investigated about the effects of fly ash on concrete 'with and without admixture, and as well as mixed form' in aspect of water-binder ratio, fly ash replacement percentages and curing ages (days). For modelling and analysis of these properties statistical best fit functions were used. This comprehensive study shows that in all types of concrete, compressive strength decreasing with increasing water-binder ratio. However, in maximum cases, highest compressive strength observed in case of 'with admixture fly ash concrete' is at 20% fly ash (FA) replacement level and shows maximum strength gaining initiates between 7-90 days in case of 'with admixture FA concrete' whereas significant strength gaining observed after 90 days onwards and ultimate strength gaining at 365 days.
Experimental Study on Performance of High Volume Fly Ash Concrete
More than 88 million tons of fly ash is generated in India each year. Most of the fly ash is of Class F type. The percentage utilization is around 10 to 15%. To increase its percentage utilization, an extensive investigation was carried out to use it in concrete. This article presents the results of an experimental investigation dealing with concrete incorporating high volumes of Class F fly ash. Portland cement was replaced with three percentages (40%, 45%, and 50%) of Class F fly ash. Tests were performed for fresh concrete properties: slump, air content, unit weight, and temperature. Compressive, splitting tensile and flexural strengths were determined up to 28 days of testing. Test results indicated that the use of high volumes of Class F fly ash as a partial replacement of cement in concrete decreased its 28-day compressive, splitting tensile strength and flexural strengths of the concrete. Based on the test results, it was concluded that Class F fly ash can be suitably used up to 50% level of cement replacement in concrete for use in precast elements and reinforced cement concrete construction. Keywords: HVFA, Fly ash is a pozzolan, HSC _______________________________________________________________________________________________________
Study of Utilization of Fly Ash as a Partial Replacement for Cement in Concrete
International Journal of Current Engineering and Scientific Research, 2019
Mining industry produces a large quantity of waste every year resulting in severe damage to the environment. The wastes that are produced during mining should be efficiently disposed or effectively reused for any other productive purposes. Coal and lignite mining results in considerable dust pollutions very specifically the coal beneficiation process produces extensive amount of ashes. These ashes can be utilized in construction materials rather than dumping as landfill. When dumped as landfills, these ashes have the tendency to be carried away by the wind resulting in massive damage to the surrounding environment. This study is made to investigate whether this fly ash can be used as an ingredient in concrete preparation as a partial replacement for cement by studying the strength properties of fly ash mixed concrete. The strength properties of concrete when certain percentage of cement in the concrete is replaced with fly ash are studied. The replacement percentage of cement is maintained at 10%, 20%, 30%, 40% and 50% and the samples are tested in the laboratory after the curing period of 21 days. The workability, tensile strength, compressive strength and shear strength of the fly ash mixed concrete sample are determined. Similar tests are conducted on concrete with no fly ash content and both results are compared to find the optimum amount of fly ash that can be replaced without compromising the quality of the concrete. By utilizing fly ash as partial replacement to cement the percentage of CO2 emitted due to cement manufacturing can also be considerable reduced.