Morphologically designed micro porous zeolite-geopolymers as cool coating materials

Anshul, Avneesh; Moinuddin, Afsha Anjum; Azad, Amaanuddin M.; Khera, Prashant; Dehariya, Kamlesh; Bherwani, Hemant; Gupta, Ankit; Kumar, Sunil

doi:10.1016/j.jhazmat.2020.123022

Cited by 9 publications

(8 citation statements)

References 38 publications

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“…The addition of 5% NS to GGPC raises the SiO 2 /Na 2 O ratio ranging from 9.85 to 11.25, demonstrating the dissolution of the materials, followed by the alliance of the oligomer with chain formation of N–A–S–H. Furthermore, by adding 5% NS, the Si/Al ratio is increased from 2.2 to 2.49 [ 68 ].…”

Section: Types Of Nanomaterials Used In Gpcmentioning

confidence: 99%

“…The addition of 0.02% CNTs increased compressive strength to the highest levels among the mixes containing different CNTs individually. Compared to the control mix, the enhancement values at 28 and 60 days were 81% and 57%, respectively [ 21 , 68 , 79 ]. Carbon nanotubes entering the GP matrix increase matrix uniformity while increasing compressive strength.…”

Section: Influences Of Nanomaterials On Fresh and Hardened Properties...mentioning

confidence: 99%

“…Using NS to create a denser GP matrix microstructure, there are fewer unreacted FA particles in GPC. NS particles served as an inner filler, filling holes in the GPC matrix and helping to achieve the compaction [ 68 , 88 ].…”

Section: Influences Of Nanomaterials On Fresh and Hardened Properties...mentioning

confidence: 99%

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Review on the Relationship between Nano Modifications of Geopolymer Concrete and Their Structural Characteristics

et al. 2022

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The main objective of this review is to study some important nanomaterials and their impact on the performance of geopolymer concrete. This paper is an investigation into trends and technology in the development of different nanomaterials to develop higher structural performance geopolymer concrete. The effect of the alkaline to binder and sodium silicate to sodium hydroxide ratio on the performances of geopolymer performances is studied. The relationship between setting time and slump is evaluated through the ternary plot, the variation in compressive strength values is evaluated using the kernel density plot, and the relationship between split tensile and flexural strength is investigated using the scattering interval plot. Regression analysis is carried out among water absorption and bulk-density result values obtained from previous literature. As the molarity and alkaline to binder (A/B) ratios increase, the strength development of geopolymer concrete increases up to a specific limit. The addition of a small quantity of nanomaterials, namely, nano silica, nano alumina, carbon nano tubes, and nano clay, led to the maximum strength development of geopolymer concrete. Incorporating these nanomaterials into the geopolymer significantly refines the structural stability, improving its durability. The various products in GP composites emerging from the incorporation of highly reactive SEM, XRD, and FTIR analysis of nanomaterials reveal that the presence of nanomaterials, which enhances the rate of polymerization, leads to better performance of the geopolymer.

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Section: Types Of Nanomaterials Used In Gpcmentioning

confidence: 99%

Section: Influences Of Nanomaterials On Fresh and Hardened Properties...mentioning

confidence: 99%

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Review on the Relationship between Nano Modifications of Geopolymer Concrete and Their Structural Characteristics

et al. 2022

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“…Na 2 SiO 3 solution as an alkaline solution result in more silica gel from GGBS and RM subsidizes denser Si-O-Si bonds during polymerization [49][50][51]. However, the Si-O-Al bond is considerably more resilient than Si-O-Si and Al bonds, leading to higher compressive strength [52][53][54]. NaOH solution detaches the silica and alumina present in the mixture as binding agents, endorses the monomer bond structure, and enhances the geopolymerization process.…”

Section: Compressive Strengthmentioning

confidence: 99%

Optimization of Alkaline Activator on the Strength Properties of Geopolymer Concrete

et al. 2022

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This study investigates the effects of red mud on the performance of geopolymer concrete in regard to fresh and mechanical properties. Red mud was used as a binder, and GGBS replaced the binder. Different proportions of red mud ranging from 0 to 30% with an interval of 2% and activator agents such as KOH and K2SiO3 for various alkaline-to-binder ratios such as 0.30, 0.40, and 0.50 were used; their effect on the fresh and mechanical properties of geopolymer concrete were the focusing parameter on the current study. Fresh properties such as setting time, slump, compaction factor, and vee-bee consistometer test, and mechanical properties such as compressive strength, split tensile strength, flexural strength, modulus of elasticity, and impact energy were studied. ANOVA and radar plot analysis were studied for various alkaline to binder (A/B) compressive strength results tested for 7 to 90 days. The increase of red mud quantity caused the decline of workability, but there was continuous enhancement of mechanical properties of GPC up to a specific limit. An alkaline-to-binder ratio of 0.4 shows excellent results compared with other ratios at ambient conditions for strength properties. ANOVA and radar plot reveal that A/B of 0.40 for 90 days shows excellent results compared with other ratios, and CS values vary in a linear manner.

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“…It is also well known that power plants' burnt waste ash, like fly ash and bottom ash, also contains good pozzolanic properties, which are being utilized in cement production as a 30% partial replacement. However, through the process of geopolymerization, 100% of fly ash can be utilized as a construction material [9]. The synergistic approach towards the use of industrial waste can set a benchmark for manufacturing construction materials which enable CO 2 emission to be minimized.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Industrial By-Products/Waste to Manufacture Geopolymer Cement/Concrete

Azad

Samarakoon

2021

Sustainability

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There has been a significant movement in the past decades to develop alternative sustainable building material such as geopolymer cement/concrete to control CO2 emission. Industrial waste contains pozzolanic minerals that fulfil requirements to develop the sustainable material such as alumino-silicate based geopolymer. For example, industrial waste such as red mud, fly ash, GBFS/GGBS (granulated blast furnace slag/ground granulated blast furnace slag), rice husk ash (RHA), and bagasse ash consist of minerals that contribute to the manufacturing of geopolymer cement/concrete. A literature review was carried out to study the different industrial waste/by-products and their chemical composition, which is vital for producing geopolymer cement, and to discuss the mechanical properties of geopolymer cement/concrete manufactured using different industrial waste/by-products. The durability, financial benefits and sustainability aspects of geopolymer cement/concrete have been highlighted. As per the experimental results from the literature, the cited industrial waste has been successfully utilized for the synthesis of dry or wet geopolymers. The review revealed that that the use of fly ash, GBFS/GGBS and RHA in geopolymer concrete resulted high compressive strength (i.e., 50 MPa–70 MPa). For high strength (>70 MPa) achievement, most of the slag and ash-based geopolymer cement/concrete in synergy with nano processed waste have shown good mechanical properties and environmental resistant. The alkali-activated geopolymer slag, red mud and fly ash based geopolymer binders give a better durability performance compared with other industrial waste. Based on the sustainability indicators, most of the geopolymers developed using the industrial waste have a positive impact on the environment, society and economy.

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Morphologically designed micro porous zeolite-geopolymers as cool coating materials

Cited by 9 publications

References 38 publications

Review on the Relationship between Nano Modifications of Geopolymer Concrete and Their Structural Characteristics

Review on the Relationship between Nano Modifications of Geopolymer Concrete and Their Structural Characteristics

Optimization of Alkaline Activator on the Strength Properties of Geopolymer Concrete

Utilization of Industrial By-Products/Waste to Manufacture Geopolymer Cement/Concrete

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