Review on Geopolymer Concrete

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.

Concrete is the most widely used building material in the construction of infrastructures such as buildings, highways, dams, and many other facilities. The increasing of worldwide production of ordinary Portland cement to meet infrastructure developments indicates that concrete will continue to be a chosen as the most common material of construction in the future. The production of cement consumes a lot of energy and increase CO 2 emission to the atmosphere. Another alternative to make environment friendly concrete is the development of geopolymer which is an inorganic alumina-silicate polymer, synthesized from materials of geological origin or by product materials such as fly ash which is rich in silicon and aluminum. In this study, 2 mixes were produced to evaluate the effect of key parameters on the mechanical properties of concrete and its behavior. For curing of specimens ambient curing (at room temperature) and oven curing at a temperature of 75ᵒC have been used. Geopolymer concrete gives better results in workability of concrete as compare to conventional concrete. Test results reveal that fly ash based geopolymer concrete gives better results of compressive strength than ordinary Portland cement. As the fluid to fly ash ratio increases the compressive strength decreases. For oven drying curing increase in compressive strength is more than ambient curing at room temperature as compare to conventional 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.

Journal of emerging technologies and innovative research, 2020

The consumption of Ordinary Portland Cement (OPC) caused pollution to the environment due to the emission of CO2. As such, alternative material had been introduced to replace OPC in the concrete. Fly ash is a by-product from the coal industry, which is widely available in the world. Moreover, the use of fly ash is more environmental friendly and save cost compared to OPC. Fly ash is rich in silicate and alumina, hence it reacts with alkaline solution to produce aluminosilicate gel that binds the aggregate to produce a good concrete. The compressive strength increases with the increasing of fly ash fineness and thus the reduction in porosity can be obtained. Fly ash based geopolymer also provided better resistance against aggressive environment and elevated temperature compared to normal concrete. As a conclusion, the properties of fly ash-based geopolymer are enhanced with few factors that influence its performance.

2021

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...

IJRASET, 2021

In Twenty First century infrastructure development concrete has come out as the dominant construction material due to its longevity and strength. The main component used in the concrete preparation is ordinary Portland cement whose production release large amount of carbon dioxide into atmosphere that causes greenhouse effects. Various surveys suggest industries around the globe contribute about 6%of carbon dioxide that is releasing into the atmosphere. In spite of this major environmental concern, we cannot reduce the use of ordinary Portland cement for making concrete. In this study concrete is prepared by using geopolymer technology i.e. by mixing fly ash, ground granulated blast furnace slag, sodium silicates, sodium hydroxide are mixed. Specimen curing is done at regular intervals of 3 days, 7days, and 28days. Compressive, split and flexural strength obtained after 3 days, 7 days and 28 days. Acid, Sulphate test and permeability test done for 14 and 28 days of curing the specimen. More strength occurred at mix 5 of fly ash 30% and GGBS 70%.

… , green chemistry and …, 2005