Addition of superplasticizer on geopolymer concrete Kenya

ADDITION OF SUPERPLASTICIZER ON GEOPOLYMER

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alkali activator in fly-ash would make geopolymer concrete. The addition of high-range water-reducing admixture up to approximately 2% of fly-ash mass have improved the workability of

Furthermore, the commercially available Naphthalene-based superplasticizer improves the workability of fresh geopolymer concrete. The start of curing of geopolymer concrete at elevated

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ADDITION OF SUPERPLASTICIZER ON GEOPOLYMER

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It is already known that the Portland Cement process manufacturing produces CO2 as emission that interfere in environment. Therefore it is necessary to find an alternative materials as a

The cement and construction industry creates around 10% of the global carbon footprint. Geopolymer and alkali-activated concrete provide a sustainable solution to conventional concrete. Due to its disadvantages, the practical usage of

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Experimental Investigation on the Influence of

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The addition of superplasticizers results in a modest improvement of mechanical strength, as well as a reduction in water content in the mixes [48 50]. Verma and Dev

for geopolymer concrete (GPC) leads to a reduction in CO2 emissions by 5 to 6 times in comparison to OPC con-crete (Gülşan et al. 2019). The usage of GPC not only addition of

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Effect of Superplasticizer and Extra Water on

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The addition of superplasticizer has shown good Geopolymer concrete has been a source of significant concern for researchers since it does not employ cement as a binder but rather pozzolanic

In this study, Geopolymer concrete was made up of 100% GGBS, sodium silicate to sodium hydroxide ratio of 2.5, Alkaline to Binder ratio of 0.5, superplasticizer (2% to 6%) and

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Influence of superplasticizer on the properties of

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From the Table 2 it is seen that a gradual increase in the strength of GPC when fly ash is replaced by GGBS up to 15% and then decreases at 20%. Concrete mixes with super

The ratio of sodium silicate to sodium hydroxide also plays an essential role in the strength properties of geopolymer concrete [5]. Superplasticizers are added to geopolymer mixes to increase

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Do superplasticizers improve the strength of geopolymer concrete?
The addition of superplasticizers results in a modest improvement of mechanical strength, as well as a reduction in water content in the mixes [48 – 50]. Verma and Dev reported that a 1% superplasticizer dosage resulted in optimum enhancement of the strength of geopolymer concrete with increasing workability.
Does superplasticizer work on Geopolymer mixtures?
In contrast to Portland concrete, which uses a superplasticizer to increase the workability, superplasticizer cannot work optimally on geopolymer mixtures because of high alkaline media . However, another study stated that superplasticizer can improve workability, it used low volume Portland cement to trigger superplasticizer [31, 32].
How to improve the workability of fresh geopolymer concrete?
Using the combination of additional cement, water, and superplasticizer (N.G.A and K.G.A) contributes to more workable mixture. The fresh geopolymer concrete workability was tested using Abram’s cone according to ASTM C-143. All proportions showed great flow (Fig. 41.2).
Why is geopolymer a green concrete technology?
Furthermore, the addition of cement, water, and superplasticizer improved workability and mechanical properties. Geopolymer is one of the green concrete technologies. Its non-Portland binder is rich in aluminosilicate. The binder is activated with the alkaline activators, such as sodium and potassium to form geopolymerization .
Does superplasticizer increase the workability of geopolymer paste with GGBFS?
Using a superplasticizer (N.G.SP) was expected to increase the workability of geopolymer paste with GGBFS, but the workability remained the same. Using the combination of additional cement, water, and superplasticizer (N.G.A and K.G.A) contributes to more workable mixture.
How to make geopolymer concrete based on fly ash?
Today one of the alternative solution is geopolymer concrete, it is based on fly-ash or other material pozzolanic. Byadding some alkali activator in fly-ash would make geopolymer concrete. The addition of high-range water-reducing admixture up to approximately 2% of fly-ash mass have improved the workability of fresh geopolymer concrete.