Mix Design of Fly Ash Based Geopolymer Concrete

Patankar, Subhash V.; Ghugal, Yuwaraj M.; Jamkar, Sanjay S.

doi:10.1007/978-81-322-2187-6_123

Cited by 90 publications

(30 citation statements)

References 5 publications

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“…In this study, ten trial mixes were performed for achieving the required compressive strength for GPC beams. e selected parameters for the trial mixes were based on methods proposed by Ferdous et al [28] and Patankar et al [29]. Molarity of sodium hydroxide, alkalinefly ash ratio, and the water-binder ratio were taken as variables.…”

Section: Proportionmentioning

confidence: 99%

Comparison of the Flexural Performance and Behaviour of Fly-Ash-Based Geopolymer Concrete Beams Reinforced with CFRP and GFRP Bars

Ahmed

Jaf

Yaseen

2020

Advances in Materials Science and Engineering

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A construction system with high sustainability, high durability, and appropriate strength can be supplied by geopolymer concrete (GPC) reinforced with glass fibre-reinforced polymer (GFRP) bars and carbon fibre-reinforced polymer (CFRP) bars. Few studies deal with a combination of GPC and FRP bars, especially CFRP bars. The present investigation presents the flexural capacity and behaviour of fly-ash-based GPC beam reinforced with two different types of FRP bars: six reinforced geopolymer concrete (RGPC) beams consisting of three specimens reinforced with GFRP bars and the rest with CFRP bars. The beams were tested under four-point bending with a clear span of 2000 mm. The test parameters included the longitudinal-reinforcement ratio and the longitudinal-reinforcement type, including GFRP and CFRP. Ultimate load, first crack load, load-deflection behaviour, load-strain curve, crack width, and the modes of failure were studied. The experimental results were compared with the equations recommended by ACI 440.1R-15 and CSA S806-12 for flexural strength and midspan deflection of the beams. The results show that the reinforcement ratio had a significant effect on the ultimate load capacity and failure mode. The ultimate load capacity of CFRP-RGPC beams was higher than that of GFRP-RGPC, more crack formations were observed in the CFRP-RGPC beams than in the GFRP-RGPC beams, and the crack width in the GFRP-RGPC beams was more extensive than that in the CFRP-RGPC beams. Beams with lower reinforcement ratios experienced a fewer number of crack and a higher value of crack width, while numerous cracks and less value of crack width were observed in beams with higher reinforcement ratio. Beams with the lower reinforcement ratios were more affected by the type of FRP bars, and the deflection in GFRP-RGPC beams was higher than that in CFRP-RGPC beams for the same corresponding load level. ACI 440.1R-15 and CSA S806-12 underestimated the flexural strength and midspan deflection of RGPC beams; however, CSA S806-12 predicted more accurately.

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Section: Proportionmentioning

confidence: 99%

Comparison of the Flexural Performance and Behaviour of Fly-Ash-Based Geopolymer Concrete Beams Reinforced with CFRP and GFRP Bars

Ahmed

Jaf

Yaseen

2020

Advances in Materials Science and Engineering

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“…Normal concrete is prepared by using binding material called Portland cement along with aggregates. It is calculable that the necessity of cement in India goes to be triumphant in half a billiontonnesthrough 2020 and there will be an insufficiency of 0.23 billiontonnes(~58%) and also the demand for cement has been without end growing attributable to enlarged infrastructural things to do in the country like India [1]. The production of cement in large amounts has a huge impact on limestone reserves as well as on Environment and it is a highly fuel or energy consuming process, generating 1 ton of CO 2 to generate 1 ton of cement [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Mix Design of Geopolymer concrete – A review

Ramesh¹,

Srikanth²

2020

E3S Web Conf.

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Geo-polymer concrete (GPC) is a most viable solution to cement as the raw materials depleting down the years and, many countries have started imposing carbon taxes. After a review for the literature reveals that there is no proper mix design procedure developed yet. GPC has better mechanical properties when compared to normal concrete. Curing conditions, setting times, workability, alkaline solution to binder ratios, molarity of alkaline solution, Na2SiO3/NaOH and SiO2/Al2O3 ratios play an important role to develop GPC. This paper presents an overview of Geopolymarization process, mechanical properties and mix design of GPC. Proper mix design of geopolymer concrete can produce desired mechanical properties for ambient curing condition. And geopolymer concrete can consider as eco-friendly construction material. This paper deals with study of advancement in mix design and mechanical properties of geopolymer concrete.

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“…The use of cement-based concrete, like ordinary Portland cement (OPC), is globally accepted due to ease of operation, mechanical properties, and low-cost production compared to other construction materials [2]. However, there are drawbacks of OPC like it releases approximately one ton of CO2, a greenhouse gas, to produce one ton of OPC [3], high energy consumption during production [4], and consumes a significant amount of natural resources [2]. Due to increasing awareness of this issue, a viable alternative for the conventional Portland cement is currently being reviewed and studied by many researchers and scientists.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Mix Formulation of Geopolymer using Nickel-laterite Mine Waste and Coal Fly Ash

Longos¹,

Tigue²,

Dollente³

et al. 2020

Preprint

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Geopolymer cement has been popularly studied nowadays compared to ordinary Portland cement but has demonstrated superior environmental advantages due to its lower carbon emissions and waste material utilization. Several studies on geopolymers have utilized various wastes like fly ash, blast furnace slag, silica fume, rice husk, or a combination of these wastes. This paper presents a mix formulation design experiment to produce a geopolymer from nickel-laterite mine waste (NMW) and coal fly ash (CFA) as a geopolymer precursor, and sodium hydroxide (SH) and sodium silicate (SS) as alkali activators. An I-optimal design experiment is used to predict the compressive strength for all the mixture's possible formulations and identify optimal proportions to minimize the average variance of prediction. A mixed formulation run of 50% NMW, SH-to-SS ratio of 0.5, and an activator-to-precursor ratio of 0.4286 yielded the highest 28-day unconfined compressive strength (UCS) of 22.1±5.4 MPa. Furthermore, using an optimized formulation of 50.12% NMW, SH-to-SS ratio of 0.516, and an activator-to-precursor ratio of 0.428, an actual UCS value of 36.26±3.6 MPa was obtained. The result implies that the synthesized geopolymer material can be potentially used for pedestrian pavers, light traffic pavers, plain concrete for leveling, building bricks, ceramic glazed facing brick, and fired clay bricks.

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Mix Design of Fly Ash Based Geopolymer Concrete

Cited by 90 publications

References 5 publications

Comparison of the Flexural Performance and Behaviour of Fly-Ash-Based Geopolymer Concrete Beams Reinforced with CFRP and GFRP Bars

Comparison of the Flexural Performance and Behaviour of Fly-Ash-Based Geopolymer Concrete Beams Reinforced with CFRP and GFRP Bars

Mechanical Properties and Mix Design of Geopolymer concrete – A review

Optimization of the Mix Formulation of Geopolymer using Nickel-laterite Mine Waste and Coal Fly Ash

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