Characteristic study of geopolymer fly ash sand as a replacement to natural river sand

Agrawal, U.S.; Wanjari, Swapnil P.; Naresh, D N

doi:10.1016/j.conbuildmat.2017.06.029

Cited by 79 publications

(26 citation statements)

References 24 publications

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“…The alkaline solution was formed by mixing NaOH and Na 2 SiO 3 at the ratio of 1:1.5. This ratio of Na 2 SiO 3 /NaOH was taken from the past research work conducted by P. Sukmak et al [9], Unnati et al [11], etc. The molarity of solution was determined via concentration of NaOH per litre of water.…”

Section: Physical Analysismentioning

confidence: 99%

Development and optimisation of curing temperature of energy-efficient geopolymer bricks

Kejkar¹,

Wanjari²

2020

JCE

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Development and optimisation of curing temperature of energy-efficient geopolymer bricks Present study focuses on development of a sustainable geopolymer brick in which the use of fly ash is maximised and the concentration of an alkaline solution without cement is reduced, in order to reduce environmental burden and carbon emissions. The geopolymer bricks were developed using the Class F fly ash with 2 to 4 Molar alkaline solution. The bricks were cured for one hour at temperatures ranging from 100 to 600°C. The compressive strength of such bricks amounts to 10.2 MPa and was achieved in the 4-Molar alkaline solution at the curing temperature of 400°C. The geopolymer bricks exhibit crystalline structure and good thermal insulation properties.

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Section: Physical Analysismentioning

confidence: 99%

Development and optimisation of curing temperature of energy-efficient geopolymer bricks

Kejkar¹,

Wanjari²

2020

JCE

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“…Fly-ash based geopolymer concretes have been synthesised from different power stations, resulting in substantially different particle size, morphology, and composition due to the different coal powders and combustion conditions in those plants [ 2 , 30 , 33 , 34 , 35 , 36 , 37 , 38 ]. Fly-ash is excellent for improving early strength and durability, rendering it suitable as the primary source materials in the synthesis of geopolymer concrete [ 2 , 33 , 36 , 37 , 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Properties of a New Insulation Material Glass Bubble in Geopolymer Concrete

et al. 2021

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This paper details analytical research results into a novel geopolymer concrete embedded with glass bubble as its thermal insulating material, fly ash as its precursor material, and a combination of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) as its alkaline activator to form a geopolymer system. The workability, density, compressive strength (per curing days), and water absorption of the sample loaded at 10% glass bubble (loading level determined to satisfy the minimum strength requirement of a load-bearing structure) were 70 mm, 2165 kg/m3, 52.58 MPa (28 days), 54.92 MPa (60 days), and 65.25 MPa (90 days), and 3.73 %, respectively. The thermal conductivity for geopolymer concrete decreased from 1.47 to 1.19 W/mK, while the thermal diffusivity decreased from 1.88 to 1.02 mm2/s due to increased specific heat from 0.96 to 1.73 MJ/m3K. The improved physicomechanical and thermal (insulating) properties resulting from embedding a glass bubble as an insulating material into geopolymer concrete resulted in a viable composite for use in the construction industry.

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“…There is a growing demand for sand and gravel, particularly in the developing countries where rapid economic development influenced growth in the construction industry (de Leeuw et al, 2010). With the increase in construction activities, the demand for river sand has increased exponentially, causing the depletion and exploitation of natural sand resources thus resulting in adverse effects on the environment, such as sliding of river shores and lowering water table (Agrawal, Wanjari, & Naresh, 2017). 1.6 billion tons of cement production annually accounts for consuming 10 to 11 billion tons of sand, gravel and crushed rock per year (Mehta, 2001).…”

Section: Introductionmentioning

confidence: 99%

Agent-Based Model of Sand Supply Governance Employing Blockchain Technology

2018

Annual Simulation Symposium (ANSS 2018)

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Sand is a key ingredient for many industries, including concrete, glass, and electronics. Sand extraction is now exceeding fossil fuels and biomass. The absence of data on aggregates sand mining makes assessments difficult and has contributed to the lack of awareness about this issue. A sand governance business framework is developed applying the blockchain technology as the main goal of this study to regulate the sand extraction and trade. Blockchain technology provides a distributed concurrency monitoring system for the supply management. Agent-Based Modeling and Simulation (ABMS) as an effective bottom-up tool is applied to demonstrate the application of the model. The sand providers and users are modeled as a collection of autonomous decision-making entities called agents. The agents interact with each other, the regulators participate in making decisions on the basis of a set of rules that are defined within the blockchain network.

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Characteristic study of geopolymer fly ash sand as a replacement to natural river sand

Cited by 79 publications

References 24 publications

Development and optimisation of curing temperature of energy-efficient geopolymer bricks

Development and optimisation of curing temperature of energy-efficient geopolymer bricks

Properties of a New Insulation Material Glass Bubble in Geopolymer Concrete

Agent-Based Model of Sand Supply Governance Employing Blockchain Technology

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