2 ADVANTAGES OF GEOPOLYMER CONCRETE

Volume: 07 Issue: 09 | Sep 2020 www.irjet.net p-ISSN: 2395-0072

EFFECT OF USE OF GGBS ON CHARACTERISTICS OF CEMENT CONCRETE

KM Supriya1 , Gaurav Tanwar2

1M.Tech Research Scholar, Department of Civil Engineering, BRCM CET, Bahal 2Assistant professor, Department of Civil Engineering, BRCM CET, Bahal ------------------------------------------------------------------------*** -----------------------------------------------------------------------Abstract - In modern construction concrete is very expensive and popular material where cement is the main composite. Every year we are producing billion tones of concrete. Production of cement is responsible for too much of CO2 production, in other words it is also responsible for global warming. Mostly India is facing the problem of pollution. Researchers have did a great job and found many ways to replace cement. For making geopolymer concrete by products of different industries may be used like. Flyash, rice husk. In this investigation geopolymer concrete is prepared with GGBS. GGBS is a byproduct of steel industry. It holds the coarse and fine aggregates in the matrix.

In this investigation geopolymer concrete is prepared with GGBS and advantages and disadvantages are also investigated. Alkaline activator 8M, 10M, 2M & 16M are taken here. The proportion of Activator is 1.2.5. All cubes are prepared and curing is done at room temperature. Curing is done with ordinary water starting after 24hrs. Workability of the geopolymer green concrete was not good. So adding of plasticizer is a good decision adopted Specimen are tested for compressive strength, flexure strength & split tensile strength test. All the tests are performed at the age of standard period as per guided by is for concrete other than GPC. Unit weight of GPC was assumed as 2400 kg/m3 . There are some limitations to fully replace the cement with GPC. But engineers are ready with this and res archers have open their hands to to save the environment. We considered it as an Eco friendly way for the concrete making. Various properties are discussed with different age of concrete. It was an observation that it has good results over other concrete. GGBS is a good replacement of cement and it will help in reducing the production of CO2. As a result of this global warming can be reduced. Our study is to test either we can get the strength of M45 grade.

Key Words: GPC, GGBS, Flyash, Rice husk

1. INTRODUCTION

In this present era, the concrete is one ofthe widely used construction material due toits durability and economy. India uses tonnes of ready-mixed concrete each year. It isin Streets, Buildings, Highways, Bridges, tunnels, Dams, Railway. It was an average that 3tonnesof concrete is used by each person on earth. CO2leads to global warming and it has a majorpartof Green house gases. Contribution of CO2 is 65% and out of this 7% is only from cement industry. India, China & USA generally consuming most of concrete produced. It was estimated that cement manufacturing was raising 2.5% annually by the production large amount of CO2 is released. It was an estimate that around 1ton of CO2 is produced in Production of 1ton of cement. On the other hand plenty of materials are available with which cement canbe replaced. It is helping a lot in reduction of emission of CO2. Fly ash, slag, rise husk, GGBS are the things which are usedfor replacement. This concrete prepared is known as Geopolymer concrete. GPC is considered now complete replacement of cement. A lot of studies has been carried out by researcher that use of GGBS in Geopolymer concrete has improved the strength propertiesbut its excess amount may reduce its strength. However, it has a history since 1940 but it is not so common till now.

1.1 INTRODUCTION TO GGBS AND GGBS BASED GEOPOLYMER CONCRETE

GGBS is generally produced during the production of steel. Generally limestone, iron ore, coke are put into a kiln for the production of iron. At a temperature of 1600oC slag is produced approximately 40% lime (CaO) & 30-40% SiO2it is cementitious in nature. It hydrates like cement. It can also resist some chemical attacks. Molten iron is removed and slag contains residue have siliceous and aluminous properties. Now molten iron slag in water produces granulate slag. Rapid cooling is done to get granulated Slag. It is then dried and ground into fine powder to get GGBS. It was firstintroduced by Joseph Davidovits. In the year 1972 as an alternative ofOPC