IJERT-An Investigation on Geopolymer Concrete with GGBFS and Fly Ash (original) (raw)
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An Experimental Investigation on GGBFS and Fly Ash Based Geopolymer Concrete
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. Geopolymer concrete utilizes an alternate material including fly ash as binding material in place of cement. As some of the surveys said one tone manufacturing of cement produces nearly one tone of carbon dioxide and which in turn produces greenhouse gases which cause global warming. Present work selects two l industrial by products such as fly ash and ground granulated blast furnace slag (GGBFS) to manufacture geo polymer concrete. Three Molarities of NaOH 8 M, 10 M, 12 M are considered with the replacement of fly ash with GGBFS and as per Indian Standard Specimens are casted and tested at room temperature curing.
Strength studies on geopolymer concrete with GGBS and Fly ash
IOP Conference Series: Materials Science and Engineering, 2020
Geopolymer concrete is a pollution controlled and eco-friendly alternate material used for construction in the recent years. This concrete has many advantages and applications. The main aim of this study is to check the effect of Fly ash and Ground Granulated Blast Furnace Slag (GGBS) on the mechanical properties of Geopolymer concrete at different replacement levels of GGBS by fly ash from 0 to 25% with 5% variation. From previous researches on Geopolymer concrete, an optimized mix is identified for testing mechanical behaviour. Sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) of 12 Molarity is used as activator solution in the ratio of 1:2.5. A carboxylic based admixture called La Hypercrete S25 is added in the mix by 1% of the weight of GGBS for increasing the workability of Geopolymer concrete. Cubes of 100mm size are cast for determining the compression strength behavior. Cylinders of 100mm dia and 200mm height are cast for splitting tensile strength and beams of size 500m...
Experimental Study on Geopolymer Concrete with Replacement of Fly ASH and GGBS
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%.
"Experimental Study on Fly Ash based Geopolymer Concrete with Replacement of Sand by GBS"
The objective of this research work was to produce a carbon dioxide emission free cementitious material. The geopolymer concrete is totally cement free concrete. In this present study the main limitations of fly ash based geopolymer concrete are slow setting of concrete at ambient temperature and Granulated Blast Furnace Slag (GBS) as replacement for natural sand. Fly ash and alkaline activator undergo geo polymerization process to produce alumina silicate gel. Alkaline solution used in the present study for the combination of sodium hydroxide and sodium silicate with a ratio of 1:2.5. A 13 Molarity solution was taken to prepare the mix and maintaining the alkaline binder ratio as 0.40. The solution for different mix Id i.e. G0S100, G10S90, G20S80, G30S70, G40S60, G50S50, G60S40, G70S30, G80S20, G90S10, and G100S0 (Where G and S are, respectively, GBS and Sand and the numerical value indicates the percentage of replacement of natural sand by GBS). The cube specimens are taken of size 100 mm x 100 mm x 100 mm. Ambient curing of concrete at room temperature was adopted. In total 66 cubes were cast for different mix Id and the cube specimens are tested for their compressive strength at age of 7 days and 28 days respectively. The strength of geopolymer concrete was increased with increase in percentage of GBS in a mix. It was observed that the mix Id G100S0 gave maximum compressive strength of 74.33 N/mm2. Also the splitting tensile strength and flexural strength for the mix G100S0 was done. Geopolymer concrete is revolutionary sustainable that will pave the way for green building.
Evaluation of Mechanical Properties of Fly Ash and GGBS Based Geopolymer Concrete
Journal of emerging technologies and innovative research, 2017
Geopolymer concrete is emerging as a promising alternative to conventional concrete. It is produced from by-product materials such as Fly ash (FA), Silica fume, and Ground granulated Blast furnace slag(GGBS), recognized as a low emission alternative binder for concrete. Recent studies have shown that the properties of Geopolymers are mostly similar to those of the OPC binder that is traditionally used for concrete. Geopolymer has limitations of slow setting at ambient temperature which can be eliminated by using GGBS. In the present study, an attempt is made to study the mechanical properties of Geopolymer concrete (GPC) containing GGBS as an additional ingredient. Five mix cases having varying GGBS dosages have been considered to study the mechanical properties. Standard cubes (150 mm), cylinders (150 mm dia. x 300mm. Length) and prisms (100 x 100 x 500 mm) were moulded to evaluate the mechanical properties of Fly Ash and GGBS based Geopolymer concrete. The results of the investiga...
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
The global demand of concrete for the construction of infrastructures is continuously increasing. The production of cement is highly intensive and it emits a lot of CO2 into the air which leads to the global warming. One of the effort to produce the environment friendly concrete is geopolymer concrete which emits less CO2. In the present study the feasibility of industrial by-products i.e.; Fly Ash (FA) and Ground Granulated Blast Furnace Slag (GGBS) powder as eco-friendly and sustainable is studied. So the main aim of this study is to analyse the performance of fly ash and GGBS based geopolymer concrete with conventional concrete which are compared with respect to strength and durability parameters for (7days and 28 days) curing period. In this study strength parameters includes compressive strength, split tensile strength and flexural strength and durability parameters includes acid attack test and rapid chloride permeability test. The two different proportions of (70% fly ash+ 30% ggbs) and (60% fly ash+ 40% ggbs) are used in geopolymer concrete. The Alkaline solutions used are sodium hydroxide (NaOH) and sodium silicate (Na2SiO3). The study includes casting of geopolymer concrete and conventional concrete specimens and tested for (7 and 28 days) ages for both strength and durability. The results show that Geopolymer concrete gives good strength and durability compared to conventional concrete. Thus, the Geopolymer concrete can be considered to be an environmentally pollution free construction material.
STRENGTH PROPERTIES OF FLY ASH AND GGBS BASED GEO POLYMER CONCRETE
The second most consumed product in the world is Cement. It contributes nearly 7% of the global carbon dioxide emission. Geopolymer concrete (GPC) is becoming a special type of more eco-friendly concrete alternative to Ordinary Portland Cement (OPC) concrete. This project mainly aims at the study of effect of class F fly ash (FA) and ground granulated blast furnace slag (GGBS) on the mechanical properties of geopolymer concrete (GPC) at different replacement levels (FA50-GGBS50, FA25-GGBS75, FA0-GGBS100) using Sodium silicate (Na 2 SiO 3) and sodium hydroxide (NaOH) solutions as alkaline activator. Specimens were cast and cured for different curing periods at ambient room temperature to determine the GPC mechanical properties viz. compressive, splitting tensile and flexural strength. Test results reveal that increase in GGBS replacement enhanced the mechanical properties of GPC at all ages at ambient room temperature.
Construction and Building Materials, 2014
Inclusion of ground granulated blast furnace slag (GGBFS) with class F fly-ash can have a significant effect on the setting and strength development of geopolymer binders when cured in ambient temperature. This paper evaluates the effect of different proportions of GGBFS and activator content on the workability and strength properties of fly ash based geopolymer concrete. In this study, GGBFS was added as 0%, 10% and 20 % of the total binder with variable activator content (40 and 35%) and sodium silicate to sodium hydroxide ratio (1.5 to 2.5). Significant increase in strength and some decrease in the workability were observed in geopolymer concretes with higher GGBFS and lower sodium silicate to sodium hydroxide ratio in the mixtures. Similar to OPC concrete, development of tensile strength correlated well with the compressive strength of ambient-cured geopolymer concrete. The predictions of tensile strength from compressive strength of ambient-cured geopolymer concrete using the ACI 318 and AS 3600 codes tend to be similar to that for OPC concrete. The predictions are more conservative for heat-cured geopolymer concrete than for ambient-cured geopolymer concrete. The effects of ground granulated blast-furnace slag blending with fly ash and activator content on the workability and strength properties of geopolymer concrete cured at ambient temperature
A Parameter to Assess the Strength of Fly Ash and GGBS-Based Geopolymer Concrete
Advances in Sustainable Materials and Resilient Infrastructure, 2022
When developing new-age building materials, "sustainability" and "energy efficiency" are key factors. The long-term view is to reduce exposure through the use of unwanted industrial by-products, which reduces the consumption of natural materials. In this direction, geopolymers have emerged as environmentally friendly substitutes for Portland cement, which, in many areas, not only reduce greenhouse gas emissions but also consume large volumes of industrial waste such as fly ash, mine tailings and metallurgical slag. Geopolymer concrete (GPC) has recently been developed as an alternative to conventional Portland cement (OPC). GPC is produced by combining raw materials such as fly ash (FA), ground granular blast furnace slag (GGBS), which are rich in silicon (Si) and aluminum (Al), using highly alkaline liquids such as NaOH and/or sodium silicate solution (Na 2 SiO 3). These alkaline liquids act as an activator and produce the binder needed to make concrete without the use of cement. In the recent past, several studies Davidovits (1999), Palomo et al. (1999), Lloyd and Van Deventer (2005) and Rangan (2008) have reported various parameters affecting the strength of GPC. These parameters include the amount of source material, the ratio of the activator to the binder, the molarity of the activator solution. Published literature indicates that several variables influenced the strength of the GPC. The combined effect of various parameters on the strength of geopolymer concrete based on GGBS and fly ash was represented by the proposal of a parameter called "Binder Index (Bi)" Rama Seshu
Feasibility Study of High Strength with Fly-Ash Based Geopolymer Concrete
International Journal of Innovations in Engineering and Science, 2021
Concrete being the core element used for the construction across the world has a main ingredient in it called `cement'. Production of cement leads to larger amount of carbon dioxide in the environment with a staggering amount 8% of carbon dioxide annually, on the other hand there is still increase in significant number of construction projects day after day which leads to more demand of cement. Keeping the fact protection of environment into consideration there is an immediate need of an alternative material to cement which will have same properties of cement and of course which can help to achieve environmentally friendly construction. One material is geopolymer concrete. Geopolymer concrete uses alumina silicate rich sources as binder instead of ordinary cement. It also uses different additives like industrial by-products which has encouraged an increase in workability, compressive strength, durability and minimization of effects of temperature variation. Geopolymer concrete is an innovative material which is 100% cement free. Geopolymer concrete is necessity for the future of construction industry and for a sustainable environment.