A Study on Effect of Partial Replacement of Cement by Fly Ash in Conventional Concrete

Kumar, K. Kalyan; Kumar, Ravi

doi:10.18535/ijsre/v4i05.06

Cited by 4 publications

(3 citation statements)

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“…The beneficial use of lime sludge may eliminate the disposal cost and could potentially generate revenue for water utilities. Some potential beneficial uses of lime sludge include subsurface filling, − cement manufacturing, , mining industry-related applications, soil pH regulation, feedstock for new composite materials, , and as a replacement for ground limestone in the wet scrubbing process. − Reports on the properties of lime sludge samples and experimental data have indicated that lime sludge could be a suitable replacement for limestone in FGD systems. ,, Among these studies are three major reports that provided data directly from successful utilization of lime sludge for FGD in power plant tests.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply–Demand Evaluation and Life Cycle Assessment

Salih

Patterson

et al. 2018

Energy Fuels

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The feasibility of lime-softening sludge utilization for flue gas desulfurization in coal-fired power plants was evaluated through a supply-demand analysis and a life cycle assessment (LCA). To evaluate the demand and supply of lime sludge to replace limestone on a national scale, the annual amount of lime sludge generated by water treatment utilities in the United States was estimated and compared with the annual amount of limestone used by coal-fired power utilities. To evaluate the environmental sustainability of reusing lime sludge in power plants, an LCA study was performed in which the environmental impact and water footprint of the proposed approach were quantified and these results were compared with the conventional approaches for limestone mining, grinding, and transportation to power plants and lime sludge disposal in landfills. Water utilities across the United States are currently generating approximately 3.2 million tons of lime sludge per year at an estimated disposal cost of approximately US$90 million, whereas power utilities are using approximately 6.3 million tons of limestone per year. The potential savings that would result from partial replacement of limestone with lime sludge was estimated to be approximately US$97 million per year. The LCA study showed that the environmental impact of lime sludge utilization in power plants under different scenarios was 2 orders of magnitude lower than that of the landfill disposal option. Furthermore, the water footprint for lime sludge reuse in power plants was almost negligible compared with that of the conventional approaches of disposing of lime sludge at water utilities or using limestone at power utilities.

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Section: Introductionmentioning

confidence: 99%

Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply–Demand Evaluation and Life Cycle Assessment

Salih

Patterson

et al. 2018

Energy Fuels

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“…The use of cow dung has been mainly used for agriculture and as a biomass for energy production [ 9 ], but other new applications have been tested, such as the use of cow dung fibers for reinforced friction composites [ 10 ], the use of adding cow dung ashes on cement mortars and concrete instead of fly ash [ 11 , 12 ] and also the use of adding cow dung on earth building products such as masonry units, mortars and plasters. In fact, despite still being a field lacking research, since the 1990s it has been possible to find some published work on the effects of cow dung additions in earth building.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cow Dung Additions on Tropical and Mediterranean Earth Mortars-Mechanical Performance and Water Resistance

Pachamama,

Faria,

Rezende

et al. 2024

Materials

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Cow dung (CD) is a material that has been used for millennia by humanity as a stabilizer in earth building techniques in vernacular architecture. However, this stabilization has been little addressed scientifically. In this study, the effect of CD additions was assessed on earth mortars produced with one type of earth from Brazil and two other types from Portugal (from Monsaraz and Caparica). The effect of two volumetric proportions of CD additions were assessed: 10% and 20% of earth + sand. The German standard DIN 18947 was used to perform the physical and mechanical tests, and classify the mortars. In comparison to the reference mortars without CD, the additions reduced linear shrinkage and cracking. An increase in flexural and compressive strengths was not observed only in mortars produced with earth from Monsaraz. In mortars produced with the earth from Caparica, the addition of 10% of CD increased flexural strength by 15% and compressive strength by 34%. For mortars produced with the earth from Brazil, the addition of 10% of CD increased these mechanical strengths by 40%. The increase in adhesive strength and water resistance promoted by the CD additions was observed in mortars produced with all three types of earth. Applied on ceramic brick, the proportion of 10% of CD increased the adherence by 100% for the three types of earth. Applied on adobe, the same proportion of CD also increased it more than 50%. For the water immersion test, the CD additions made possible for the mortar specimens not to disintegrate after a 30 min immersion, with the 20% proportion being more efficient. The effects of the CD on mechanical performance, including adhesion, were more significant on the tropical earth mortars but the effects on water resistance were more significant on the Mediterranean earthen mortars. CD has shown its positive effects and potential for both tropical and Mediterranean earthen plasters and renders tested, justifying being further studied as an eco-efficient bio-stabilizer.

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“…It specified for road building materials. The mechanical properties for mix proportioned the Dry Bamboo ash in M25 grade of concrete better bindings and weight less concrete and compared to nominal M25 concrete Standard sizes of concrete cubes, And quick setting times initial setting time-10minutes and after final settings-25minutes [17]. And strength, workability, and durability performance, is the option same in normal M25 grade of concrete [18].…”

Section: Introductionmentioning

confidence: 99%

Characteristics Investigations of Dry Bamboo Ash Fractional Replaced Cement with in M25 Grade Concrete

Chandrasekaran¹

2021

ACSM

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Most bamboos are used in-house ceiling, Ornament works behavior science of earliest culture regulations. If fresh and dry stages bamboos are equally important, of construction works. Green stage bamboos working process of interlocking formations woodworks and dry stage bamboos are working in support for centering for slabs, tunneling or varies constructional purposes. These papers say about dry bamboos ash to use the sub stained to mixed the partially replaced within 53 grades of cement. In 20, 30, and 40%. And constituent of mixing ratio is M25 grade of concrete (1:1:2). And its process of proper casting of cubes, beams and cylinders to put in to the test analysis for strength, absorption tastings machines and these each types of test result are higher values. Because its better constituent DBA ash mixed with cement substance identical strength attained the concrete cubes, cylinders and beams. And its improved concrete strength and highly interlocking ability of friction bonding into the coarse and fine aggregate of the concrete. And same time its high workability.

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A Study on Effect of Partial Replacement of Cement by Fly Ash in Conventional Concrete

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Cited by 4 publications

References 0 publications

Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply–Demand Evaluation and Life Cycle Assessment

Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply–Demand Evaluation and Life Cycle Assessment

Effect of Cow Dung Additions on Tropical and Mediterranean Earth Mortars-Mechanical Performance and Water Resistance

Characteristics Investigations of Dry Bamboo Ash Fractional Replaced Cement with in M25 Grade Concrete

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