Geopolymer concrete: Turn waste into environmentally friendly concrete (original) (raw)
Related papers
Development and Properties of Low-Calcium Fly Ash-Based Geo polymer Concrete
IJIRAE:: AM Publications,India, 2024
The main objective of this current study is to develop a cement free concrete material because of the green house effect during the manufacture of cement. It is reported that every one tonne production of cement emits one tonne carbon dioxide which causes global warming and in broad sense disturbs the entire ecological system. It results the promotion of geopolymer concrete where silica and alumina will bind together with alkaline solution during the process of polymerization. The researchers taken greater initiatives in geopolymer concrete there is no specific study related to the mix design because of commercialization and patenting. Hence the authors interested in identifying specific mix design using trial proportion of low calcium fly ash and alkaline solutions (sodium silicate and sodium hydroxide). This investigation deals suggested that pozzolans such as blast furnace slag might be activated using alkaline liquids to form a binder and hence totally replace the use of OPC in concrete. In this scheme, the main contents to be activated are silicon and calcium in the blast furnace slag. The main binder produced is a C-S-H gel, as the result of the hydration process.
A Review on Geopolymer Concrete
2016
Concrete is the world’s most versatile, durable and reliable construction material. Next to water, concrete is the most used material, which required large quantities of Portland cement. Ordinary Portland cement production is the second only to the automobile as the major generator of carbon di oxide, which polluted the atmosphere. In addition to that large amount energy was also consumed for the cement production. Hence, it is inevitable to find an alternative material to the existing most expensive, most resource consuming Portland cement. Geopolymer concrete is an innovative construction material which shall be produced by the chemical action of inorganic molecules. Fly Ash, a byproduct of coal obtained from the thermal power plant is plenty available worldwide. Flyash is rich in silica and alumina reacted with alkaline solution produced aluminosilicate gel that acted as the binding material for the concrete. It is an excellent alternative construction material to the existing pl...
Development of Eco-Friendly Geopolymer Concrete with Different Grade
Iconic Research and Engineering Journals, 2020
Pollution caused by cement production is a major environmental issue throughout world. Geopolymer concrete is an alternative material to the cement as well as environment friendly material in the construction field. The geopolymer concrete is prepared without cement by using fly ash as base material and combination of sodium hydroxide and sodium silicate as an alkaline activator is 12 moles. Thus, silicate and alumina available in fly ash react with alkaline solution to produce alumina silicate gel that binds, the fine and coarse aggregates to produce a good concrete. The hot curing method, ambient and external exposure curing is proposed to adjust with the condition of cast in situ environment. The different grades of geopolymer concrete such as M 20, M 30, M 40, M 50 and M 60 developed and tested for density, workability and compressive strength to compared with cement concrete and proves GPC is an alternative eco-friendly concrete.
Review: An Overview of Geopolymer Concrete
International Journal of Technical Research & Science, 2020
The world's most used construction material is concrete comprised of cement, aggregate, water, and added substances as it is seen as progressively flexible, tough, and dependable. Concrete is the second most useful material after water, which required huge amounts of Portland cement. The manufacturing procedure of Ordinary Portland Cement (OPC) emits a lot of CO2 which is very harmful to the environment. The amount of carbon emission is increasing day by day hence have to find an alternative of cement concrete. Geopolymer concrete is the best alternative of Portland cement which is manufactured by organic compound molecules. Fly Ash, is a measurable component of geopolymer concrete which is available in a lot of amounts. Fly ash is a waste by-product of thermal power plant its is easily accessible around world. Fly ash is rich in silica and alumina which when mix with alkaline activators makes and binding material knows as alumina silicate gel. This is the best alternative for construction material in place of Portland cement concrete. Geopolymer concrete a greener substitute for normal Portland concrete cement. This paper tells about the constituents of geopolymer concrete, its quality, and its applications.
Geopolymer Concrete - A Brief Review
2014
Large quantities of Portland cement is one of the major generator of carbon dioxide, into the atmosphere causing environmental problems and In addition to that large amount of embodied energy also being consumed for the cement production and also consumes huge amount of the natural resources i.e. limestone and fossils fuel but also produces almost 0.9t of CO2 for 1t cement clinker production. Also world cement production generates 2.8 billion ton manmade greenhouse gas annually on the other side abundant availability of fly ash worldwide creates opportunity to utilize (byproduct of burning coal, regarded as a waste material) as substitute for OPC to manufacture concrete solving the disposal problem and substitute to concrete by an eco friendly and sustainable material similar to conventional concrete. Geopolymer or inorganic alumino-silicates polymer is synthesized from predominantly silicon and aluminum materials of geological origin or by product materials, such as fly ash with alkaline liquids such as a combination of Sodium Silicate and Sodium Hydroxide. The chemical composition of geopolymer is similar to that of zeolite, but amorphous in microstructure. Flyash-based geopolymer binders show excellent short and long-term mechanical characteristics and similar or even better to conventional concrete and geopolymers are much superior to aggressive environment and fire than conventional concrete.
Feasibility Study on Fly Ash based Geopolymer Concrete
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.
Concrete is the world's most versatile, durable and reliable construction material. Next to water, concrete is the most used material, which required large quantities of Portland Cement. Ordinary Portland Cement production is the second only to the automobile as the major generator of carbon di oxide, which polluted the atmosphere. In addition to that large amount energy was also consumed for the cement production. Hence, it is inevitable to find an alternative material to the existing most expensive, most resource consuming Portland Cement. Geopolymer concrete is an innovative construction material which shall be produced by the chemical action of inorganic molecules. Fly Ash, a by-product of coal obtained from the thermal power plant is plenty available worldwide. Flyash is rich in silica and alumina reacted with alkaline solution produced aluminosilicate gel that acted as the binding material for the concrete. It is an excellent alternative construction material to the existing plain cement concrete. Geopolymer concrete shall be produced without using any amount of ordinary Portland cement. This paper briefly reviews the constituents of geopolymer concrete, its strength and potential applications.
Geopolymer Concrete: an Emerging Green Material for Modern Construction
2020
Nowadays the environmental health is considered to be the most important topic for concern. The emission of CO2 and other harmful gases to the atmosphere become a serious problem and the root cause of environmental alteration. In other ways, the production of cement is reducing continuously due to the unavailability of resources and a large amount of carbon footprint. To overcome all these problems the low CO2 emitting and alumina silicate rich sources are used as binders instead of ordinary cement. The paper reviews all the recent and experimental works done by the researchers in order to study the physical and mechanical properties of Geopolymer Concrete with different mixtures of binders and additives introduced for increasing the strength and durability. The use of different industrial by-products in concrete development is encouraged and the workability, effects of temperature variation, use of admixture, fibers and effects of waterbinder ratio for the Geopolymer Concrete are e...
2016
The main objective of this current study is to develop a cement free concrete material because of the green house effect during the manufacture of cement. It is reported that every one tonne production of cement emits one tonne carbon dioxide which causes global warming and in broad sense disturbs the entire ecological system. It results the promotion of geopolymer concrete where silica and alumina will bind together with alkaline solution during the process of polymerization. The researchers taken greater initiatives in geopolymer concrete there is no specific study related to the mix design because of commercialization and patenting. Hence the authors interested in identifying specific mix design using trial proportion of low calcium fly ash and alkaline solutions (sodium silicate and sodium hydroxide). This investigation deals with five different trial mixes with different molarity of NaOH (8M, 10M, 12M and 14M) and super plasticizer combinations under the curing temperature of 6...