A review on microstructural study and compressive strength of geopolymer mortar, paste and concrete

Ng, C. M.; Alengaram, U. Johnson; Wong, Leong Sing; Mo, Kim Hung; Ramesh, S.

doi:10.1016/j.conbuildmat.2018.07.075

Cited by 249 publications

(89 citation statements)

References 82 publications

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“…synthesis, possible source materials of precursors or fillers, the resulting material properties, etc. [20][21][22]. The main advantage of geopolymer material is its adaptability to different user requirements, e.g.…”

Section: Geopolymer Backgroundmentioning

confidence: 99%

Microscopic Study of the Concrete / Geopolymer Coating Interface

Perná¹

2019

Ceramics - Silikaty

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This paper presents an experimental study at microscopic level of the interface between geopolymer coating and concrete. Seven varieties of prepared geopolymer-based materials (GbM) have been applied to industrially prepared concrete bodies. The differences in the composition of the layers as well as in the application type (dry/wet surface) can cause ion migration from the viscose GbM to the solid concrete and reversely from the concrete to the formatted netting of the hardened geopolymer. The interlayer between the geopolymer coating layers and the hardened concrete has been investigated by two microscopic methods: optical and scanning electronic microscope equipped with SEM/EDAX analyses. The results have shown that the coating layers considerably reduce calcium ion penetration into the GbM chained structures.

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Section: Geopolymer Backgroundmentioning

confidence: 99%

Microscopic Study of the Concrete / Geopolymer Coating Interface

Perná¹

2019

Ceramics - Silikaty

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“…et al, 2016;Islam, A. et al, 2015;Nayaka, R.R. et al, 2018;Ng, C. et al, 2018;Sumesh, M. et al, 2018).…”

Section: Usage Of Industrial By-productsmentioning

confidence: 99%

Performance evaluation of industrial by-products as sustainable practice against the exploitation of virgin materials

Alengaram¹

2019

Sustainable Construction Materials and Technologies (SCMT)

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The rise in population and competitiveness among growing economies to stamp their superiority are some of the prime reasons for natural materials to disappear rapidly. This research involves the utilization of industrial by-products, namely rice husk ash (RHA), fly ash (FA), palm oil fuel ash (POFA), palm oil clinker powder (POCP), oil palm shell (OPS), and palm oil clinker (POC) as alternatives in the development of both conventional and geopolymer concretes; notably, OPS was used as whole replacement for conventional crushed granite aggregate in the development of impact and blast resistant concrete. Scanning electron microscopy and X-ray diffraction analyses were used to characterize the microstructure of concrete. The results showed that incorporation of RHA, POFA and POCP up to 30% minimizes concrete deterioration and loss in compressive strength; OPS concrete with its ductile property proved its impact and blast resistant characteristics.

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“…Davidovits distinguished geopolymers from AAMs in that the both pertain to different systems, respectively, from the perspective of material science [ 4 ]. Due to industrial by-products and/or other inexpensive aluminosilicate sources such as fly ash (FA), granulated blast furnace slag (GBFS), steel slag, metakaolin (MK), waste glass, saw dust, mine tailing, rice husk ash, natural pozzolans, and water glass (WG) can be potentially utilized in production of geopolymers [ 5 ]; a large quantity of non-renewable resources stands a chance of conservation as well as massive solid waste is recycled and reused. Less greenhouse gas emission can be achieved by replacing traditional cement-based materials with geopolymer-based alternatives in building industry and civil engineering sector [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, less pollution was caused by geopolymer/alkali-activated concretes than conventional cement concretes [ 17 , 18 ]. However, further research is needed to identify the sustainability and low-carbon nature of geopolymers and related products [ 1 , 3 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Protective Geopolymer Coatings Containing Multi-Componential Precursors: Preparation and Basic Properties Characterization

et al. 2020

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This paper presents an experimental investigation on geopolymer coatings (GPC) in terms of surface protection of civil structures. The GPC mixtures were prepared with a quadruple precursor simultaneously containing fly ash (FA), ground granulated blast-furnace slag (GBFS), metakaolin (MK), and Portland cement (OPC). Setting time, compressive along with adhesive strength and permeability, were tested and interpreted from a perspective of potential applications. The preferred GPC with favorable setting time (not shorter than 120 min) and desirable compressive strength (not lower than 35 MPa) was selected from 85 mixture formulations. The results indicate that balancing strength and setting behavior is viable with the aid of the multi-componential precursor and the mixture design based on total molar ratios of key oxides or chemical elements. Adhesive strength of the optimized GPC mixtures was ranged from 1.5 to 3.4 MPa. The induced charge passed based on a rapid test of coated concrete specimens with the preferred GPC was 30% lower than that of the uncoated ones. Setting time of GPC was positively correlated with η[Si/(Na+Al)]. An abrupt increase of setting time occurred when the molar ratio was greater than 1.1. Compressive strength of GPC was positively affected by mass contents of ground granulated blast furnace slag, metakaolin and ordinary Portland cement, and was negatively affected by mass content of fly ash, respectively. Sustained seawater immersion impaired the strength of GPC to a negligible extent. Overall, GPC potentially serves a double purpose of satisfying the usage requirements and achieving a cleaner future.

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A review on microstructural study and compressive strength of geopolymer mortar, paste and concrete

Cited by 249 publications

References 82 publications

Microscopic Study of the Concrete / Geopolymer Coating Interface

Microscopic Study of the Concrete / Geopolymer Coating Interface

Performance evaluation of industrial by-products as sustainable practice against the exploitation of virgin materials

Protective Geopolymer Coatings Containing Multi-Componential Precursors: Preparation and Basic Properties Characterization

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