Present a report with detailed facts regarding the Fly Ash Geopolymer and discuss its various contributions in the process of making concrete.
At present day, demand of concrete has grown at an exponential rate. It is estimated that concrete is the second most used resource preceded by water. Traditionally, in order o manufacture concrete Ordinary Portland Cement was used. However, this process of using OPC to make concrete used to release a huge amount of carbon dioxide in the surrounding environment. Hence, manufactures were keen to come up with an environment friendly alternative to produce concrete. As a result, Fly ash based Geopolymer concrete is used. The primary aim of this paper is to produce detailed facts regarding the Fly Ash Geopolymer and discuss its various contributions in the process of making concrete.
Geopolymer is nothing more than an alkali binder, which is formed by activations of alkali silicate of various aluminosilicate materials. It was first invented in the year of 1978. The cement industry is one of the largest payer of Central Excise and one of the largest contributors to global GDP. It is important to note that, as the global infrastructure is on the boom since last decade, the demand of cement industry is very high. One of the most important products of the industry is concrete. However, it is important to know that, cement industry in general consumes a huge amount of energy in order to manufacture their products mainly concrete. It is estimated that right after steel manufacturing of concrete and Portland cement is one of the largest consumer of fuels (Castel et al. 2015, p.50).
It is estimated that, in order to manufacture concrete, more than 4GJ per of energy is required to produce only one ton of the product. One of the most widely used fuel to run this industry is coal. There are as per estimation more than 5000 mini cement plants located all over the globe. Thus, this data is alone to prove the amount of fuel is consumed each year by this industry. It is known fact that these fossil fuels are not unlimited and in fact, the world deposit of coal is getting depleted at an alarming rate each year. Along with this, as discussed before, the entire process releases tons of CO2 each year, damaging the surrounding environment to a huge extent. Along with this, it also believed one of the largest contributors global warming (Nath et al. 2014, p.170).
The global cement industry have now turned their attention towards using Fly Ash geopolymer in order to make sure all such problems are being mitigated to a large extent. The Fly Ash Geopolymer cement concretes contain inorganic composites. These inorganic composites are assumed to be prospective concretes which have the potential to become a substantial environment friendly element which can be used both to manufacture and replace traditional concretes. It is important to note that the new substance has have even a higher strength and better resistance to acid attacks and other factors which might damage the overall quality of traditional concrete. Unlike traditional concrete and other products of cement industry, the geoploymer does not tend to form CSHs better know n as calcium silicate hydrates in order to forma matrix for strength. Rather the geopolymer utilizes the polyccondensation of silica and alumina to gain strength for its structure. There are two main constitutes of the geoploymer: first is the very source materials and second is the alkaline liquids. In order to produce the by material of the geo polymer which is the fly ash, the source materials needs to have both silicon and aluminum. The fly ash geo polymer has unique when compared to aluminiosilicate materials. The basic properties of geo polymer concrete are as follows:
Geo polymer has been used extensively since last few years due to its credibility to replace traditional concrete. Along with this, there has been a vast development in the process of developing geosynthesis fly ash applications. New and more top notch materials have been designed in order to create new applications and procedures in order to transform new ideas which have been implemented to grant in both inorganic as well as in mineral chemistry. Hence, the problem statement is to critically evaluate the application of Geo Polymer along with the design process of Geo Polymer concrete.
To analyse the strength of fly ash based geopolymer
To compare it with other mixes
Compressive strength of fly ash based geopolymer is greater than other mix of geopolymer
Only water based geopolymer will be compared with fly ash based geopolymer
Normal density with unit weight of 2400kg/m3
Mass of combination of aggregates=77% of Geopolymer= 1848kg/m3
Geopolymer- Its binding system which become hard at room temperature
A number of modern infrastructure have been made up geo polymer concrete and number foundations have been build which are stronger and is more resistant towards external corruptions. Along with this, the new infrastructures which are made by geopolymer concrete ia far stronger when compared to traditional concrete (Phoo-Ngernkham et al. 2018, p.22).
As stated before, the entire process of manufacturing concrete and cements consumes a huge amount of fossil fuels which is considered to be one of the prime contributors of global warming. It is estimated around more than 7% of total global warming is contributed by this process alone. However, manufacturing geo polymer cements this problem can be reduced to more than 70% less emission of CO2. As per a recent European project which was mainly based up on Fly Ash-based geo polymer cements, they are going to replace the traditional cement manufacturing process in upcoming decade. One of the biggest applications of rock based geopolymer cements is that they are most suitable for manufacturing infrastructure in order to contain various activities such as hazardous waste and other toxic materials. In fact, most of the nuclear power stations constructed today is mostly made up of similar cements. This is because, unlike in traditional cements, the hydration due to heat is much higher in geo polymer cements. Hence, this reduces the chance of any fatal consequence in such infrastructures.
The rock base geo polymer cements and Fly Ash is perhaps better applications of all other forms of the respective cement. The overall tensile strength of infrastructures made with such materials is very high. One of the best applications of geo polymer cement is that, the structural strength can be controlled and in fact, the overall maintenance cost of infrastructures made with such material are generally lower than that of traditional cements. Another major application of geo polymer cement is that they are widely used in manufacturing the runaways for many heavy load carrying aircrafts. It is interesting to note that, even a freshly build runway can withstand the Boeing or even Airbus plane. The only condition is that the runway can be used after four hours it has been made. Such is the durability of geopolymer cement.
In order to understand the actual reason for geopolymer cements to be this effective over traditional cements is its composition. The compositions are follows:
Fly Ash Geo polymer cement has completely altered the concept of concrete. Today, they are widely used to build many major highways and important major infrastructures all around the world. Some of the major advantages of geo polymer concrete are as follows:
Geopolymers is not entirely free form flaws. Although, it can be termed as to be super concrete, there are some major drawbacks which make the credibility of suing such cements at stake. Some of the most notable ones are described below:
Experimental design is used for this research. The previous literute is used for the explanation of topic. Secondary data is also used alongwith experimental data to conduct this research. The selected research design is exploratory as it explore the situation. Google scholar and educational library is used to search relevant articles. Geopolymer, fly ash, application of Geo Polymer key words are used to search articles.
Experiment design- In this experiment, influence and role of fly ash based geoploymer is evaluated. Hardened and fresh Geopoymer is chosen as the performanace critiera. The parameters are alkaline liquid fly ash ratio, water geopolymer ratio, wet mixing time, heat curing time and heat curing temperature.
Liquid fly based polymer 0.30-0.45 ranges are selected. Below mention data is recomneded for fly ash based geo polymer.
Following process will be followed
Requirement- Low calcium fly ash based geo polymer
Compressive strength 45Mpa
Trail Mixture proportion is below mentioned
Combined aggregates- 1848kg/m3
Water to Geopolymer
In this experiment, numerous batches of different ration has been produced and compressive strength is calculated.
In order to finally conclude it needs to be stated that, the Fly Ash Geopolymer is no doubt the best alternatives of traditional cements in order to create better infrastructure. It has a huge opportunity in future and can ultimately replace traditional cements. It is both effective in terms of consumption of energy and capital required to manufacture it and covers all the drawbacks of traditional cements to a broader extent. The only problem with it is that it is not used widely as per traditional cements and hence, many of the plants does not have all the skills to manufacture it. It is only with due time, these drawbacks can be mitigated to use the geopolymer cement to its full potential.