STUDY ON THE BEHAVIOUR OF FLY ASH BASED GEO POLYMER CONCRETE WITH 20MOLAR NAOH ACTIVATOR

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http://www.iaeme.com/IJCIET/index.International Journal of Civil Engineering and Technology (IJCIET)Volume 8, Issue 1, January 2017, pp. Available online at http://www.iaeme.com/IJCIETISSN Print: 0976-6308 and ISSN Online: 0976 IAEME Publication Scopus STUDY ON THE BEHAVIOGEO POLYMER CONCRETEPG Student, Civil Engineering Department, Associate Professor, Civil Engineering Department, ABSTRACT Background/Objectives: Green house gas emissions are the main problem in the present scenario. The amount of Green house gas emissions are increasing and COgas which effects the environment and leads to global warming. paper deals with the alternate materials for theCONCRETE) and it reduces the emission ofis converted into useful material. This Geo polymer concrete is a mixture oflike sodium silicate and its hydroxfly ash. Findings: The strength of geo polymer concrete is increased with molarity of NaOH.20 molarity is used in this paper. The reaction of alumina, silica present in flyash with alkalresults in aluminosilicate which acts as a binder useful in high quality of green concret.paper different tests are conducted to find propertiesas well as compressive) for 3, in gaining knowledge about the morophological composition of concrete which might result in path-breaking trends in construction industry. Key words: Fly Ash, Geo Polymer ConcreCite this Article: T.Narendra and N.Srujana, Study On The Behaviour of Fly Ash Based Geo Polymer Concrete with 20molar Naoh ActivatorTechnology, 8(1), 2017, pp. 826http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=11. INTRODUCTION Now a days content of CO2 is increasing drastically in earths atmospheredirectly or indirectly emit more amountcouldnt digest, in which our ordinary PortlandIn order to protect the environment, which to be done at great magnitude, necessity forIJCIET/index.asp 826 International Journal of Civil Engineering and Technology (IJCIET) , pp. 826833, Article ID: IJCIET_08_01_097 http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=6308 and ISSN Online: 0976-6316 Scopus Indexed STUDY ON THE BEHAVIOUR OF FLY ASH BASED GEO POLYMER CONCRETE WITH 20MOLAR NAOH ACTIVATOR T.NARENDRA PG Student, Civil Engineering Department, K L University, A. P, India N.SRUJANA Associate Professor, Civil Engineering Department, K L University, A. P, India Green house gas emissions are the main problem in the present Green house gas emissions are increasing and COgas which effects the environment and leads to global warming. Methods/Statistical Analysis:paper deals with the alternate materials for the cement which is a green concrete (GEOPOLYMER CONCRETE) and it reduces the emission of CO2. Fly ash is a byproduct of thermal industry which is converted into useful material. This Geo polymer concrete is a mixture oflike sodium silicate and its hydroxide form along with other products like metakolin in addition toThe strength of geo polymer concrete is increased with molarity of NaOH.molarity is used in this paper. The reaction of alumina, silica present in flyash with alkalresults in aluminosilicate which acts as a binder useful in high quality of green concret.paper different tests are conducted to find properties which include strength (flexural, 7and 28 days for 20M. Applications/Improvements:in gaining knowledge about the morophological composition of concrete which might result in breaking trends in construction industry. Geo Polymer Concrete, Molarity, Alkaline Solution, T.Narendra and N.Srujana, Study On The Behaviour of Fly Ash Based Geo Polymer Concrete with 20molar Naoh Activator . International Journal of Civil Engineering and 826833. http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=1is increasing drastically in earths atmosphere. There are many products which directly or indirectly emit more amount of CO2 than permissible limit or amount which the atmosphere ordinary Portland cement (OPC) fall at higher rank in construction industry. In order to protect the environment, which to be done at great magnitude, necessity foreditor@iaeme.com &IType=1 UR OF FLY ASH BASED WITH 20MOLAR NAOH Associate Professor, Civil Engineering Department, Green house gas emissions are the main problem in the present Green house gas emissions are increasing and CO2 one of the greenhouse Methods/Statistical Analysis: This a green concrete (GEOPOLYMER . Fly ash is a byproduct of thermal industry which is converted into useful material. This Geo polymer concrete is a mixture of various components ide form along with other products like metakolin in addition to The strength of geo polymer concrete is increased with molarity of NaOH. The molarity is used in this paper. The reaction of alumina, silica present in flyash with alkalin base results in aluminosilicate which acts as a binder useful in high quality of green concret. In this which include strength (flexural, split tensile Applications/Improvements: This study helps in gaining knowledge about the morophological composition of concrete which might result in Ambient Curing T.Narendra and N.Srujana, Study On The Behaviour of Fly Ash Based Geo International Journal of Civil Engineering and http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=1 There are many products which than permissible limit or amount which the atmosphere (OPC) fall at higher rank in construction industry. In order to protect the environment, which to be done at great magnitude, necessity for alternative Study On The Behaviour of Fly Ash Based Geo Polymer Concrete with 20molar Naoh Activator http://www.iaeme.com/IJCIET/index.asp 827 editor@iaeme.com materials to be introduced, which is environment friendly and economical aroused in front of researchers, one of the alternative materials is geo-polymer concrete, which can replace general or ordinary concrete and is environmentally friendly product. Not only to reduce the CO2, but also increase the compressive strength than OPC and uses the byproduct, which in turns helps in effective disposal. The accretion appeal for the ecology affable architecture is the reason acceptable architecture material development. The various issues like ambient conditions, hand to mouth living conditions along with surrounding ecological conditions are the spoil sport which can hamper the development. The major GHC promoting product and activity arresting in nature. The allergory to Portland cement coupled with low GHC emission is possible with Geo-polymers. Geo-polymers as well display above engineering backdrop when chosen between the counterparts. Attrition to factors like reaction with sulphate, bases, etc can be resisted using green concrete with reduced levels of calcium content1-7. Sustainability is the need of the hour and it is the major driving factor in case of architecture and construction based firms which is often combined with economic feasibility factor also in case of manufacturing of construction materials. Based on the user specification constraint including commercial and ecological aspects, the performance of the manufacturing item is determined. In general, it is to be noted that that it increases the content of carbon dioxide content in the atmosphere and most complex method of its production is also witnessed among the counterparts. Green concrete is need of the hour which is far better than the manufacturing materials of the similar kind. Green concrete with low content of calcium tend to possess high quality of strength and resistance of external environmental constraints and compounds8-16. The term geo-polymer was introduced by Davidovits in 1978.Geopolymer is an industrial by product like flyash, bagasseash, Low calcium flyash(CLASS F) was used.The curing process of Geo-polymer concrete plays a vital role in physical properties of hardened concrete. It can be done by ambient and oven curing process. In oven curing process external heat is supplied, but in practical conditions providing the entire structure external heating source is a difficult task and which is not possible17-20. Despite the fact that OPC is in extensive usage in construction and architecture industry for ages, it releases green-house gases into the atmosphere at the time of manufacturing. Geopolymer concrete is the recent technology used to reduce OPC. Fly ash reacts with acrid solutions to anatomy a cementitious material; fly ash based geopolymer does not afford carbon dioxide. In this work, pond ash is advised as fractional backup for beach as accomplished accumulated in the geopolymer concrete. Fly ash and pond ash are residues from agitation of coal. Hence in this paper we studied and found a method, where ambient curing is also as such effective as oven curing. This paper summarizes the behaviour of fly ash based Geo-polymer concrete with the specified molarity of NaOH activator5-16. Palomo ,Grutzeck and Blanco1 investigated the acrid activation of decay materials. has become an important breadth of analysis in abounding laboratories because it is accessible to use these abstracts to amalgamate bargain and ecologically complete adhesive like architecture materials. In the present paper, the apparatus of activation of a fly ash (no added solid actual was used) with awful acrid solutions is described. These solutions, fabricated with NaOH, KOH, baptize glass, etc., the artefact of the acknowledgment is an baggy aluminosilicate gel Mechanical strengths with ethics in the 60 MPa ambit were acquired afterwards abating the fly ash at 85 C for alone 5 h. Anurag, Deepika2 and his advisers advised after-effects of an beginning abstraction on the Green concrete characteristics. The composition of sodium hydroxide considered is 16M, 8M and 12M along with 72 hours,24 hours and 48 hours abating time respectively. Baptize assimilation, compactness strength along with Compressive strength based tests were conducted on various chemical compositions. ParthibanShobana3 and his fellows investigate the Chemical Admixture does not show any impact on Compressive Strength but shows considerable increase in the workability of the concrete. The Specimens have been cured in ambient temperature condition to check the suitability of Geopolymer concrete for cast-T.Narendra and N.Srujana http://www.iaeme.com/IJCIET/index.asp 828 editor@iaeme.com in-situ conditions. 7 day strength was found to be 70% of its 28 days strength, the 28 days strength is higher compared to OPC. Ganapati, Adhiseshu4 and his fellows investigate replacement of Fly ash for 5 different GGBS content (upto 40%) and 8M NAOH solution and NA2SIO3/NAOH ratio was 2.5 taken and the result indicates that high amount of slag is present, the compressive Strength of 31.85 at 3 days achieved. From the paper it is aswell assured that the replacement of flyash with green concrete does not disturb its properties such as strength or to that matter any significant change in composition. Compressive Strength (upto 90%) was accomplished in 14 canicule and the boilerplate body of Geopolymer concrete compared to OPC. Partha, Prabir and Pradip5 advised that the GGBS added to (0 to 20%) of absolute binder, cogent access in Backbone and some abatement in workability empiric on Geopolymer concrete. The accession of GGBFS added ambience of the accurate at ambient temperature. The backbone accretion slowed down afterwards the age of 28 canicule and continues to access at a slower amount until 180 days. The delayed consequence of admixture variables on the improvement of minimization spine was agnate to that on the advancement of compressive quality. Supraja and Kantarao6 advised that in adjustment to aftermath GGBS added Geopolymer accurate altered Molarities 3M, 5M, 7M and 9M are taken to adapt altered mixes. The Cube Specimens are taken of 100mm*100mm*100mm.Two altered abating are agitated oven abating at 50C and Direct Sunlight Curing. The Result shows that there is no cogent access in backbone of oven convalescent specimens afterwards 3 canicule of Geopolymer accurate and the backbone of Geopolymer accurate is accretion with the access of the chastity of Sodium Hydroxide. Sunlight abating is added acceptable for applied conditions. Madheshwaran, Gnansundar, Gopalkrishnan7 instructed the variation with respect to GGBFS in precise has been prompted and Longer subsiding time greater the Polymerization activity and delayed consequences in compressive Strength. Higher the Molar Ratio (7 M) with Higher GGBS (100%)results in the Higher Compressive Backbone and Split minimization spine .By this compressive Backbone in the ambit of 45Mpa to 60 Mpa is expert and Highest is for 100% GGBS. Aside from action seriousness, the GPCs advance the mechanized rot for bearing the bounden plan in cement, there are both feel and Economical Benefits of Using Fly fiery debris and GGBS. The increase of Naphthalene based Super Plasticizer pleasant included than 2% barely decrease the Compressive Strength. Ravindra and Somnath8 advised that with the Increase of silica agreeable in flyash, the admeasurement of Spherical shaped unreacted fly ash particles in the Geopolymercast advertence accumulation of added aluminosilicate gel which after-effects in the added compressive strength. When the silica agreeable above 4 by (Sio2/Al2o3) leads to abridgement in acuteness and abatement in Backbone while lower baptize agreeable in the mix, Higher was the Compressive Strength. Filler Actual like Sand Reduces arise and improves the porosity of the Composite and its accession aswell reduces the abundance of Binder adhesive authoritative the actual added economical. The Setting time of Geopolymer is aswell best at Higher Silica content. Pradip and Prabir9 investigated the Fly ash Geopolymer mixtures were designed adding GGBFS upto 30% of total Binder and curing is at ambient Temperature. By adding 30% GGBFS Compressive Strength about 55 Mpa has been achieved.The compactness of the Gel increased when SlagContent is higher in the paste. MatghewSudhakar and Natarajan10 investigated that with the increase of GGBS content, Compressive Strength is gradually increases .in this Coal Ash and GGBS Combination is taken along with 15M Alkaline Solution and total replacement of about 30% is taken into consideration and Higher Compressive Strength up to 57Mpa is achieved .However the Cost of GGBS added Geopolymer is 7% Higher than OPC but when we Consider Strength aspect, it is almost 3 times than OPC at 7 days. Study On The Behaviour of Fly Ash Based Geo Polymer Concrete with 20molar Naoh Activator http://www.iaeme.com/IJCIET/index.asp 829 editor@iaeme.com 2. REQUIRED EXPERIMENTAL COMPONENTS The list of manufacturing items along with required materials required to perform the tests are given by Metakaolin Coarse aggregate Alkaline liquid: Sodium hydroxide and Sodium Silicate Fine aggregate Fly ash 2.1. Fly ash The test material is taken from Vijayawada Thermal Power Station (VTPS), Ibrahimpatnam. Generally, the material is collected from electrostatic precipitator (ESP) hoppers. Table 1 gives the composition of the material considered for testing and supplied by VTPS and from the theortical knowledge it is very well understood that it belongs to ClassF (ASTM C618). Table 1: Flyash Composition S. No. Name of the Chemical % by weight 1 Sulfate (SO4) 1.24% 2 Magnesium Oxide (MgO) 0.91% 3 Titanium Dioxide (TiO2) 0.42% 4 Ferric Oxide (Fe2O3 + Fe3O4) 4.17% 5 Calcium Oxide (CaO) 6.20% 6 Alumina (Al2O3) 20.21% 7 Silica (SiO2) 64.08% 8 Loss on Ignition (LOI) 1.07% 2.2 Coarse aggregate The coarse aggregates of the type (10mm coarse aggregates) are used for testing. In general, the coarse aggregate is the type which is sustained on as IS sieve of size 4.75. 2.3. Fine aggregate Fine aggregate is the natural river sand. Fine aggregate is characterized by any presence of small quantities of carcinogenic impurities or balls of clay in it . Silt content should not exceed 4%. 2.4. Alkaline Liquid The experimental setup tries to use activator in the form of sodium silicate along with alkaline liquid. Here, sodium hydroxide (NaOH) in flake form is used although both flake as well as pellet forms are available. In general, it is well known fact to everbody's conscience that the preference of liquid is either silicate form or oxide form (the commonly used metallic compositions include sodium and potassium). 2.5. Metakaolin If the metakaolin used only purpose is easily removed specimen for even shape. So, 20%metakaolin was used. http://www.iaeme.com/IJCIET/index.3. METHODOLOGY 3.1. Alkaline liquid synthesis The composition of NaOH is 40 molecular weight in this paper obtained dissolving of flake form in constrast to the pellet form of NaOH in wate r(water after distillation is usually preferred for this type of processes). The flakes dissolved without any ressolution. This NaOH should prepare before 24hours of casting. of casting and mixed thoroughly. 3.2. Mix Design For, 20Molarity geo-polymer mix 3 different proportions The normal ratio preferred is 0.45 ( activator to fly ash). 3.3. Geo-polymer concrete preparationThe aggregates and flyash were mixed, then the alkaline activator solution was added to it and mixing is continued till a uniformity is observed. It was found that the fresh fly ash based geowas cohesive and dark in colour. 3.4. Preparation of specimens The mix is placed in cubes of size 150mm150mm150mm, Beams of size 500mm100mm100mm andcylindrical moulds of size 150mm diameter and 300mm height.3.5. Curing The specimens were kept for ambient curing at room temperature (24and 28 days after de-moulded for 24 hours casting.4. RESULT AND DISCUSSIONS4.1. Compressive Strength It is most essential property of the manufacturing material and it I vital to determine the performance of various material based on the above characteristics of this sole property. The curing time varies in direct proportion to the compressive strength. Compression tests were carried out at 3, 7and 28 days curried at ambient indoor room temperature. The compressive are shown in fig.1 T.Narendra and N.Srujana IJCIET/index.asp 830 The composition of NaOH is 40 molecular weight in this paper obtained dissolving of flake form in constrast to the pellet form of NaOH in wate r(water after distillation is usually preferred for this type of processes). The flakes dissolved without any residue, now remaining water is added to make 1liter solution. This NaOH should prepare before 24hours of casting. Na2SiO3were added to NaOH before 20min polymer mix 3 different proportions Na2SiO3were prepared i.e. 1:2, 1:2.5, and 1:3. The normal ratio preferred is 0.45 ( activator to fly ash). polymer concrete preparation The aggregates and flyash were mixed, then the alkaline activator solution was added to it and mixing is nued till a uniformity is observed. It was found that the fresh fly ash based geoThe mix is placed in cubes of size 150mm150mm150mm, Beams of size 500mm100mm100mm andcylindrical moulds of size 150mm diameter and 300mm height. The specimens were kept for ambient curing at room temperature (240C) till the tests conducted for 3, 7 moulded for 24 hours casting. SIONS It is most essential property of the manufacturing material and it I vital to determine the performance of various material based on the above characteristics of this sole property. The curing time varies in direct e compressive strength. Compression tests were carried out at 3, 7and 28 days curried at ambient indoor room temperature. The compressive test was conducted as per IS: 516 Figure.1 Compressive strength for cubes editor@iaeme.com The composition of NaOH is 40 molecular weight in this paper obtained dissolving of flake form in constrast to the pellet form of NaOH in wate r(water after distillation is usually preferred for this type of idue, now remaining water is added to make 1liter were added to NaOH before 20min prepared i.e. 1:2, 1:2.5, and 1:3. The aggregates and flyash were mixed, then the alkaline activator solution was added to it and mixing is nued till a uniformity is observed. It was found that the fresh fly ash based geo-polymer concrete mix The mix is placed in cubes of size 150mm150mm150mm, Beams of size 500mm100mm100mm and C) till the tests conducted for 3, 7 It is most essential property of the manufacturing material and it I vital to determine the performance of various material based on the above characteristics of this sole property. The curing time varies in direct e compressive strength. Compression tests were carried out at 3, 7and 28 days curried at was conducted as per IS: 516 1959.the results Study On The Behaviour of Fly Ash Based Geo Polymer Concrete http://www.iaeme.com/IJCIET/index.4.2. Flexural Strength Test Flexural strength is carried out on beam specimensmaximum load is noted. The flexural strength results are shown in fig.2 are obtained from the conducting of the test using compression machine as per IS:Figure 24.3. Split Tensile Strength TestIt is also one of the crucial properties of the manufacturing material and is one of the indirect tension test. The split tensile strength results are given in fig. 3 as the test conducted as per standard specifications at normal operating conditions (compression testing machine as per guidelines IS:Fig5. CONCLUSIONS The papers presents the following conclusions pertaining to the results and various tests conducted. The Na2SiO3 to NaoH by mass equal to 1:3 has resulted into the higher strength as compared to the ratio of 1:2 and 1:2.5 for the geopolymer concrete. Compressive strength of concrete increases 30% for 7days, flexural strength of concrete increases 40% for 7 days and split tensile strength 50% for 7 days when compared to 3 days strength. Compressive strength of concrete increases 42% for 28 days, flexura28 days and split tensile strength 60% for 28 days when compared to 7 days strength. The concentration of NaOH varies in direct proportion to the green concrete strength. f Fly Ash Based Geo Polymer Concrete with 20molar Naoh ActivatorIJCIET/index.asp 831 on beam specimens and load deflection curve, maximum deflection and maximum load is noted. The flexural strength results are shown in fig.2 are obtained from the conducting ion machine as per IS: 516: 1959. 2 Results of Flexural strength obtained from the test. Split Tensile Strength Test It is also one of the crucial properties of the manufacturing material and is one of the indirect tension test. ile strength results are given in fig. 3 as the test conducted as per standard specifications at normal operating conditions (compression testing machine as per guidelines IS:Figure.3 Split tensile strength for cylinders apers presents the following conclusions pertaining to the results and various tests conducted. to NaoH by mass equal to 1:3 has resulted into the higher strength as compared to the ratio of 1:2 and 1:2.5 for the geopolymer concrete. Compressive strength of concrete increases 30% for 7days, flexural strength of concrete increases 40% for 7 days and split tensile strength 50% for 7 days when compared to 3 days strength.Compressive strength of concrete increases 42% for 28 days, flexural strength of concrete increases 45% for 28 days and split tensile strength 60% for 28 days when compared to 7 days strength.The concentration of NaOH varies in direct proportion to the green concrete strength. ith 20molar Naoh Activator editor@iaeme.com and load deflection curve, maximum deflection and maximum load is noted. The flexural strength results are shown in fig.2 are obtained from the conducting Results of Flexural strength obtained from the test It is also one of the crucial properties of the manufacturing material and is one of the indirect tension test. ile strength results are given in fig. 3 as the test conducted as per standard specifications at normal operating conditions (compression testing machine as per guidelines IS: 5816: 1999) apers presents the following conclusions pertaining to the results and various tests conducted. to NaoH by mass equal to 1:3 has resulted into the higher strength as compared to the ratio of Compressive strength of concrete increases 30% for 7days, flexural strength of concrete increases 40% for 7 days and split tensile strength 50% for 7 days when compared to 3 days strength. l strength of concrete increases 45% for 28 days and split tensile strength 60% for 28 days when compared to 7 days strength. The concentration of NaOH varies in direct proportion to the green concrete strength. T.Narendra and N.Srujana http://www.iaeme.com/IJCIET/index.asp 832 editor@iaeme.com The curing time in general and from the tests conducted in particular varies in direct relation to the green concrete compressive strength. Geopolymerconcrete tend to show no significant physical change in its properties at normal operating room temperature which is observed in case of normal variety. The complete setting of Geopolymer concrete specimens will take upto 72 hours without any reminisces on the surface on which it is hardened. REFERENCES [1] Palomo, M.W.Grutzeck, M.T.Blanco Alkali-activated fly ashes -A cement for the future, Elsevier, 1998, Volume 29, Issue 8, page 1323-1329. [2] Anurag Mishra, DeepikaChoudhary, Namrata Jain, Manish Kumar, NidhiShardaandDurgaDutt, Effect of Concentration of Alkaline Liquid and Curing Time on Strength and Water Absorption of Geopolymer Concrete, ARPN Journal ,2008, ISSN-1819-6008,Page 14-18. [3] K.Parthiban, K.saravanarajamohan, S.Sobana, A.AnchalBhaskar, Effect of Replacement of Slag on the Mechanical Properties Of Fly ash based Geopolymer Concrete, International Journal of Engineering and Technology(IJET),2013, ISSN: 0975-4024 , Page 2555-2559 [4] Ganapati Naidu, A.S.S.N. Prasad, S. 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