Influence of aggregate content on the behavior of fly ash based geopolymer concrete (original) (raw)

Behaviour of Fly Ash based Geopolymer Concrete in Fresh State

Indian journal of science and technology, 2017

An attempt has been made in this study to investigate the properties of geopolymer concrete while in the fresh state. Fresh properties of geopolymer cement have been studied by varying concentration of sodium hydroxide (NaOH) having concentration 8M, 10M, and 14M. Further, the ratio of Na 2 SiO 3 to NaOH was kept in the range of 1, 1.5 and 2.5. It has been found that standard consistency decreased significantly and initial and final setting times decreased as the salt concentration of the alkaline solution and of NaOH increased. The compressive strength of geopolymer cement increased with the increase in the concentration of NaOH and with the increase in the concentration of sodium hydroxide. The compressive strength was even higher than conventional concrete at the concentration of 14M.

Survey on Fly Ash Based Geopolymer Concrete

Journal of emerging technologies and innovative research, 2020

A comprehensive summary of the extensive studies conducted on fly ash-based geopolymer concrete is presented. Test data are used to identify the effects of salient factors that influence the properties of the geopolymer concrete in the fresh and hardened states. These results are utilized to propose a simple method for the design of geopolymer concrete mixtures. The economic merits of the geopolymer concrete are also mentioned. The behaviour of in filled stub column and hollow stub column is studied experimentally by applying gradual load along with analytical integrated the engineering behaviour of fly ash and GGBS synthesized binder at different mix proportions as well as at dissimilar curing environments and these properties are compared with conventional concrete. In addition, another local waste material, manufactured sand (M-sand), was used as a replacement for conventional sand by many researchers in the development of green geopolymer concrete, the finding of this review is we can use Fly Ash ,MK, GGBS, as binders to wholly replace conventional ordinary concrete would lead to alternate eco-friendly geopolymer matrix.

The effect of limestone aggregate on the properties of fly ash based geopolymer concrete

2012

The uses of Portland cement give disadvantages to the nature which is by releasing carbon dioxide gas to the air. This situation can cause global warming at the same time contribute to the greenhouse effect. Besides, the production of Portland cement causes depletion of raw material. In order to solve this problem, the fly ash based geopolymer concrete was produced. This research is focus on the effect of limestone aggregate on the properties of fly ash based geopolymer concrete. The research was done to obtain the optimum proportion of limestone aggregate in fly ash based geopolymer concrete, to determine the effect of limestone aggregate on the characteristic of fresh fly ash based geopolymer concrete and to determine the compressive strength of fly ash based geopolymer concrete with limestone aggregate inclusion. The effect of limestone aggregate as a granite aggregate replacement in geopolymer concrete were investigated 60 numbers of cube dimension 1 OOmm x lOOmm x lOOmm with tw...

A study on the strength development of geopolymer concrete using fly ash

International Journal of Engineering & Technology, 2017

Cement consumption is increasing day by day due to the tremendous development in the infrastructure facilities. The production of one ton of cement emits approximately one ton of carbon dioxide to the atmosphere. In order to reduce the use of cement a new-generation concrete has been developed such as geopolymer concrete (GPC).Geopolymer Geopolymer is a new material which has the potential to replace ordinary Portland cement. It is an inorganic material synthesized by alkali activation of amorphous aluminosilicates at ambient or slightly increased temperatures having an amorphous to semi-crystalline polymeric structure. In this study, low calcium flyash from Tuticorin was used to produce geopolymer concrete. The geopolymer was synthesized with sodium silicate and sodium hydroxide solutions. The sodium hydroxide pellets was dissolved in the distilled water to make free from mixing water contaminants. The ratio of sodium silicate and sodium hydroxide ratio was kept as 2.5. The concent...

Properties of Geopolymer Concrete using Fly Ash

2021

This investigation presents the details of development of the process of making fly ash based geopolymer concrete.Therefore present study adopted a rigorous trial and error process in order to develop the geopolymer concrete using fly ash. The focus of the study was to identify the salient parameters that influence the mixture properties and the properties of fly ash-based geopolymer concrete.

A Review: To Investigate the Properties of Geopolymer Concrete with Fly Ash in Place of Cement

International Journal for Research in Applied Science and Engineering Technology (IJRASET), 2022

A novel type of concrete called geopolymer concrete is created by reacting sodium silicate containing minerals with sodium aluminate and a caustic activator, such as fly ash or slag from the production of iron and metal. It can serve as a viable replacement for regular portland cement. In addition to having outstanding mechanical qualities, geopolymer concrete also possesses a number of extremely high-end qualities, including corrosion and fire resistance. The majority of industrial solid waste and bottom ash from waste incineration are stacked up at random, which not only uses up land resources but also negatively affects the ecosystem. They can be recycled and utilised as raw materials to make geopolymer concrete. Geopolymer concrete has the ability to absorb pollutants like heavy metals and other radioactive chemicals, so that its stability, elasticity, and thermal qualities are unaffected. However, geopolymer concrete's use goes beyond that because of its superior qualities. The geopolymerization of concrete, the origin of the raw materials, the numerous categories of activators, the development processes, and the diverse applications of geopolymer concrete in various fields are all covered in this paper. In this section, the factors that affect the mechanical and abrasion resistance of geopolymer concrete. In order to establish a hypothesis that will be used to develop geopolymer concrete for future development, the disadvantages and application quantification of geopolymer concrete, as well as its mix design, will be summarised in this paper.

MIX Design of Fly-Ash Based Geopolymer Concrete

International journal of scientific and research publications, 2016

Geopolymer is a new development in the world of concrete in which cement is totally replaced by pozzoloanic materials like fly ash and activated by highly alkaline solutions to act as a binder in the concrete mix. For the selection of suitable ingredients of geopolymer concrete to achieve desire strength at required workability, an experimental investigation has been carried out for the gradation of geopolymer concrete and a mix design procedure is proposed on the basis of quantity and fineness of fly ash, quantity of water, grading of fine aggregate, fine to total aggregate ratio. Sodium silicate solution with Na2O = 16.37 %, SiO2 = 34.35 % and H2O = 49.28 % and sodium hydroxide solution having 13M , 10M 15M concentration were obtained throughout the experiment. Water-to-geopolymer binder ratio of 0.40, alkaline solution-to-fly ash ratio of 0.35 and sodium silicate-to-sodium hydroxide ratio of 2.0 by mass were fixed on the basis of workability and cube compressive strength. Workabi...

A Review on Fly Ash based Geopolymer Concrete

2017

The invention of Geo-polymers has paved the way for construction industry to use Fly ash based Geo-Polymer Concrete with 100 % replacement of cement. Substantial experimental research has been conducted ever since on Geo-Polymer concrete which can prove to the sustainable construction material of the future. This paper reviews various materials used for manufacturing this concrete such as alkaline liquids, fly ash, aggregates and super-plasticizers. The experimental investigations conducted by various researchers on the aspects such as mix design, curing etc. and their impact on properties of Geo-polymer concrete has also been reported. Finally, concluding remarks and suggestions regarding the applications of Geo-polymer concrete are delineated at the end.

Effect of curing condition on the mechanical properties of fly ash-based geopolymer concrete

SN Applied Sciences

In the present study, the mechanical properties of geopolymer concrete (GPC) has been investigated. GPC represents a novel technology that is giving significant concern in industrial construction, especially in term of the current emphasis on sustainability. In this study, the NaOH and Na 2 SiO 3 solutions were used as an alkaline solution in all GPC mixes. Na 2 SiO 3 with 10 concentration of molarity, activator-to-FA ratio of 0.4, Na 2 SiO 3 /NaOH ratio of 1.75, and two curing regimes viz., ambient curing, and heat curing at 75 °C for 26 h were employed. The experimental results indicated that the geopolymer concrete strengths, modulus of elasticity, and other mechanical properties increased with heat curing as compared to ambient temperature curing. The elastic modulus of GPC was associated with the compressive strengths and similar to those of OPC concrete. Furthermore, the geopolymer concrete mixture requires proper mix proportion and temperaturecontrolled curing conditions to accomplish good results.

STUDY ON THE MECHANICAL PROPERTIES OF THE FLY ASH GEOPOLYMER CONCRETE

This paper presents the results of the research on the mechanical characteristics of fly ash geopolymer concrete (GPC). Three mixture of geopolymer concrete graded 30, 40 and 50 MPa were prepared. The process of experimental studies that is used to determine the compressive strength, modulus of elasticity, flexural strength is performed in accordance with ASTM standards. The results are analysed and evaluated according to statistical methods. The value of modulus of elasticity and characteristic bending tensile strength of geopolymer concrete will be compared with the value of the equivalent cement concrete that are calculated according to the prevailing theory. The evaluation of the mechanical properties of the fly ash geopolymer concrete is needed for the research and application of this material in the construction.