Mechanical and microstructural properties of fly ash-based engineered geopolymer mortar incorporating waste marble powder

Gill, Parmender; Rathanasalam, Vijaya Sarathy; Jangra, Parveen; Pham, Thong M.; Ashish, Deepankar Kumar

doi:10.1007/s40974-023-00296-3

Cited by 4 publications

(3 citation statements)

References 44 publications

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“…Similar types of results were reported by various researchers [25,26]. Typical experiments were conducted for self-compacting concrete [27], Geopolymer concrete [28,29]…”

Section: Split Tensile Strengthsupporting

confidence: 81%

Strength and Microstructural Behavior of Sustainable Concrete with Varied Proportions of Recycled Fine Aggregate from Construction and Demolition Waste

Waliitagi,

Rathanasalam,

Chinnadurai

et al. 2024

ACSM

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Recycled fine aggregates (RFAs) encompass inorganic particles derived from the crushing of building and demolition waste, constituting an environmentally sustainable source for the concrete industry. This study explores the integration of construction and demolition (C&D) waste-based RFAs in concrete, aiming to reduce carbon emissions and promote eco-friendly construction practices. The RFAs, obtained from aging concrete structures, contribute fines to the concrete mixture, and their viability is assessed in this research. The investigation encompasses strength and microstructural analyses of RFA-based concrete blends with varying replacement percentages (20%, 40%, 60%, 80%, and 100%). The comprehensive evaluation spans 7 and 28 days of water curing, with particularly promising outcomes observed up to a 40% replacement threshold. The optimal performance is identified at the 40% RFA replacement, justifying the applicability of RFAs as an alternative fine aggregate. Microstructural studies conducted through a secondary electron microscope (SEM) specifically for the 40% RFA replacement substantiate the particle packing effect and corroborate the experimental findings. The findings underscore the sustainable potential of incorporating RFAs in concrete formulations, offering a pathway toward environmentally conscious and resilient concrete structures.

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“…Similar types of results were reported by various researchers [25,26]. Typical experiments were conducted for self-compacting concrete [27], Geopolymer concrete [28,29]…”

Section: Split Tensile Strengthsupporting

confidence: 81%

Strength and Microstructural Behavior of Sustainable Concrete with Varied Proportions of Recycled Fine Aggregate from Construction and Demolition Waste

Waliitagi,

Rathanasalam,

Chinnadurai

et al. 2024

ACSM

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“…Obviously, as % of CKD in GP mix increase, Si & Al content decrease with boosting in CaO. This reduces the amount of soluble Si whose promote the geopolymer reaction 14 , 21 , 23 . Additionally, soluble Si reorganizes the geopolymer network by building up Si–O–Si and Si–O–Al bonds in GP gels and they also reinforce the connections between particles leading to formation of 3D GP network of poly silalate 61 .…”

Section: Resultsmentioning

confidence: 99%

“…Geopolymers (GPs) can be chemically prepared from natural clays, natural fibers or from industrial solid waste precursors. Metakaolin 14 , 15 and basalt fibers 16 , 17 are examples of natural resources that have been used in GP fabrication, while, blast furnace slag 18 , red clay brick waste 19 , 20 , kiln dust 21 , concrete wastes 22 and marble dust 23 are examples of solid wastes that have been incorporated as GP percoursers. From a practical point of view, GPs have accepted performance similar to PCs in some of their applications, and they also offer additional advantages, such as diminished setting times, rapid strength development 24 , 25 .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of slag/CKD one-mix geopolymer cement reinforced by low-cost nano-particles, mechanical behavior and durability performance

Hashem,

Razek,

Mashout

et al. 2024

Sci Rep

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CKD is a byproduct of the cement industry, and its accumulation in the surrounding represents one of many issues associated with this industry. In this study, CKD was utilized in the fabrication of one-mix geopolymer cement (GP) composite as an economical and environmental solution for disposal of this byproduct. The mechanical properties and durability behavior during various deterioration actions were inspected. The obtained findings demonstrated that, replacing slag by CKD in the fabricated GP could cause an elongation in the setting times and reduction in the compression strength of approximately 50%. However, GPs containing CKD offered an accepted resistance to irradiation by γ-rays and to firing action. Reinforcing the GPs with nano Fe3O4 (NF) or nano TiO2 (NT) accelerated the geopolymerization reaction and offered mechanical properties surprising the control mix, this was related to the micro-filling and catalytic actions of the NPs which supported the formation of symmetrical and organized clusters of CSHs and CASH gel as shown in SEM micrographs. The reinforcing mixes surpassing the control mix in the protection against intrusion of sulfate ions which they could retain about 92% of their strength after 4 months of exposure while the control mix retained 80%. Furthermore, they showed a superior resistance to the destructive effect of irradiation by high dose gamma rays up to 1500 kGy and they retained ~ 75% of their strength after irradiation while the control mix was kept at only 35%. The fabricated composites are recommended for usage in many applied construction fields.

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Factors Influencing Compressive Strength in Fly Ash-Based Geopolymer Concrete: A Comprehensive Review

Rihan,

Abdalla Abdalla

2024

Iran J Sci Technol Trans Civ Eng

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Mechanical and microstructural properties of fly ash-based engineered geopolymer mortar incorporating waste marble powder

Cited by 4 publications

References 44 publications

Strength and Microstructural Behavior of Sustainable Concrete with Varied Proportions of Recycled Fine Aggregate from Construction and Demolition Waste

Strength and Microstructural Behavior of Sustainable Concrete with Varied Proportions of Recycled Fine Aggregate from Construction and Demolition Waste

Fabrication of slag/CKD one-mix geopolymer cement reinforced by low-cost nano-particles, mechanical behavior and durability performance

Factors Influencing Compressive Strength in Fly Ash-Based Geopolymer Concrete: A Comprehensive Review

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