Journal ArticleDOI
Improving compressive strength of low calcium fly ash geopolymer concrete with alccofine
Bharat Bhushan Jindal,Dhirendra Singhal,Sanjay Sharma,Deepankar Kumar Ashish,Parveen Parveen +4 more
- Vol. 5, Iss: 1, pp 17-29
TLDR
In this paper, fly ash based geopolymer concretes with different percentages of alccofine were made by mixing sodium hydroxide and sodium silicate as an alkaline activator and cured at ambient as well as heat environment in an electric oven at 90oC.Abstract:
Geopolymer concrete is environmentally friendly and could be considered as a construction material to promote the sustainable development. In this paper fly ash based geopolymer concretes with different percentages of alccofine were made by mixing sodium hydroxide and sodium silicate as an alkaline activator and cured at ambient as well as heat environment in an electric oven at 90oC. Effects of various parameters such as the percentage of alccofine, curing temperature, a period of curing, fly ash content, was studied on compressive strength as well as workability of geopolymer concrete. The study concludes that the presence of alccofine improves the properties of geopolymer concrete during a fresh and hardened state of concrete. Geopolymer concrete in the presence of alccofine can be used for the general purpose of concrete as required compressive strength can be achieved even at ambient temperature. The 28 days compressive strength of 73 MPa, when cured at 90-degree Celsius, confirmed that it is also very suitable for precast concrete components.read more
Citations
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Journal ArticleDOI
The past and future of sustainable concrete: A critical review and new strategies on cement-based materials
Jorge de Brito,Rawaz Kurda +1 more
TL;DR: A global and extensive review is made here to provide an overall view of concrete sustainability in all possible paths and to open the minds of the readers to the vastly unexplored world of “green concrete”.
Journal ArticleDOI
Mechanical and microstructural properties of fly ash based geopolymer concrete incorporating alccofine at ambient curing
TL;DR: In this paper, the properties of fly ash-based geopolymer concrete incorporating alccofine at ambient temperature, using 100% raw waste material as a binder have been reported.
Journal ArticleDOI
Enhanced properties of high-silica rice husk ash-based geopolymer paste by incorporating basalt fibers
Saloni,Parveen,Thong M. Pham +2 more
TL;DR: In this article, the effect of different basalt fiber contents (0, 10, 20, 30, 100% by binder mass) as a replacement of rice husk ash on the fresh, hardened and microstructural properties of geopolymer paste has been evaluated.
Journal ArticleDOI
The effect of nanomaterials on properties of geopolymers derived from industrial by-products: A state-of-the-art review
TL;DR: In this article, the effects of various nanomaterials such as nano-SiO2, nano-Al2O3 and nano-TiO2 on geopolymer paste, mortar and concrete derived from various industrial by-products as sources of aluminosilicates are discussed.
Journal ArticleDOI
Effect of Addition of Alccofine on the Compressive Strength of Cement Mortar Cubes
R Balamuralikrishnan,J Saravanan +1 more
TL;DR: In this paper, the influence of Alccofine on the compressive strength of concrete cubes was investigated. But, the results were analyzed and presented in the form of charts and graphs.
References
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Journal ArticleDOI
Costs and carbon emissions for geopolymer pastes in comparison to ordinary portland cement
TL;DR: In this paper, the authors examined the lifecycle cost and carbon impacts of Ordinary Portland Cement (OPC) and geopolymers in an Australian context, with an identification of some key challenges for geopolymer development.
Journal ArticleDOI
Geopolymer concrete: A review of some recent developments
TL;DR: An overview of advances in geopolymers formed by the alkaline activation of aluminosilicates is presented along with opportunities for their use in building construction as mentioned in this paper, with respect to fresh and hardened states, interfacial transition zone between aggregate and geopolymer, bond with steel reinforcing bars and resistance to elevated temperature.
Journal ArticleDOI
Alkali-activated fly ash/slag cements: Strength behaviour and hydration products
TL;DR: The activation of fly ash/slag pastes with NaOH solutions has been studied in this paper, where the authors established the equations of the models describing the mechanical behaviour of these pastes as a function of the factors and levels considered.
Journal ArticleDOI
Workability and strength of coarse high calcium fly ash geopolymer
TL;DR: In this article, the basic properties viz., workability and strength of geopolymer mortar made from coarse lignite high calcium fly ash were investigated, and the results revealed that the workable flow of the geopolymers was in the range of 110 −±5% −135 −± 5% and was dependent on the ratio by mass of sodium silicate to NaOH and the concentration of NaOH.
Book
Geopolymers : structure, processing, properties and industrial applications
TL;DR: In this article, the authors describe the synthesis and characterization of fly ash glass chemistry and inorganic polymer cements for geopolymers and their application in nuclear waste immobilization and toxic waste removal.