Development of Novel Constructional Material from Industrial Solid Waste as Geopolymer

Panigrahi, Muktikanta; Mohanty, S.; Dash, Radha Raman; Ganguly, Ratan Indu

doi:10.1088/1757-899x/410/1/012012

Cited by 12 publications

(4 citation statements)

References 7 publications

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“…The ratio of NaOH/Na 2 SiO 3 was 2.5, and the concentration of NaOH was 12 molarity. It has been studied that NaOH/Na 2 SiO 3 was 2.5, and 12M NaOH was the most optimal mixture of AAS to produce the most optimal compressive strength [20]…”

Section: Materials Preparationmentioning

confidence: 99%

“…Zhang et al [19] stated that curing geopolymer should be carried out at a temperature of 60-100 o C for 24-28 hours. Panigrahi et al [20] have studied the effect of curing temperature at 50, 60, 70, and 80 o C and discovered that curing at 70 o C for 24 hours had provided the optimum geopolymerization to achieve higher mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Setting Time and Flowability of Geopolymer Mortar Using Local Industry and Agriculture Waste as Precursor in Indonesia

Afriansya¹,

Astuti²,

Ratnadewati³

et al. 2021

GEOMATE

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Geopolymer is a renewable construction material that reduces dependence on ordinary portland cement (OPC), where OPC manufacturing impacts carbon dioxide (CO 2 ) emissions. The main aspect of geopolymers being studied is the precursor of pozzolanic material, used as a cement substitute because it contains aluminosilicate (Si-Al). Polymerization occurs between the precursors, reacted by alkaline activator solution (AAS). Sodium hydroxide (NaOH) and sodium silicate (Na 2 SiO 3 ) were used as AAS. In this study, local precursors from industrial waste and biomass were utilized. Fly ash was employed as a reference in the precursor by 5% -10% substitution of glass powder, rice husk ash, bagasse ash, and palm shell ash. Moreover, 2% superplasticizer and 5% extra water were used to increase the flowability of fresh geopolymer. Tests were carried out on the setting time of paste, flow table, and compressive strength of geopolymer mortar. The tests were on the initial setting time of 25-75 minutes and the final setting time of 40-115 minutes. The setting time results revealed that the time of each substitution accelerated geopolymerization due to the substitution of precursors containing higher CaO and SiO2. Setting time and flowability/workability had a linear regression correlation (R 2 ) of 0.95, with the flow table ranging from 180-250 mm. The compressive strength ranged from 25.88 -36.36 MPa through a curing temperature of 70 o C for 24 hours, followed by curing at ambient temperature for up to 28 days.

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Section: Materials Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Setting Time and Flowability of Geopolymer Mortar Using Local Industry and Agriculture Waste as Precursor in Indonesia

Afriansya¹,

Astuti²,

Ratnadewati³

et al. 2021

GEOMATE

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“…Steps for geopolymer preparation with high carbon ferrochrome (HCFC) slag are described below (Table 3) [23,24].…”

Section: Synthesis Proceduresmentioning

confidence: 99%

Synthesis and Characterizations of High Carbon Ferrochrome (HCFC) Slag Based Geopolymer

Panigrahi¹,

Mohanty²,

Ganguly³

et al. 2021

Advances in Geopolymer-Zeolite Composites - Synthesis and Characterization

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In the present Investigation, Geopolymer (GP) is made using High carbon Ferrochrome (HCFC) slag by synthesizing silicon and aluminum present in it with alkali liquid solution which binds other non-reactive materials present in the slag. The compressive strength of GP is found to be 11 MPa after 7-days of air curing. Increasing air curing time to 28-days, the strength is measured to be 15 MPa. XRD analyses indicate that there is gradual transformation of crystalline phases to non-crystalline glassy phases. SEM images show presence of more amount of glassy phase after air curing for a longer time. This is also corroborated with mechanical properties such as compressive strength. TGA results are also discussed for both uncured and cured GP samples. DSC isotherms indicate oozing out of inbuilt water present in the prepared GP materials which is an indication of condensation polymerization reaction occurring during the formation of Geopolymers.

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“…5,6) Recently, there have also been studies on the manufacture of geopolymers by dry sieving and grinding pond ash with a caustic soda aqueous solution, used as an alkali activator. [7][8][9] It is worth noting that these studies used empirical formulation methods where the molar concentration of alkali activator was adjusted in various ways regardless of the mineralogical and chemical properties of the pond ash and the content of amorphous aluminosilicate materials that can react. [7][8][9] Manufacturing geopolymers based on empirical formulation methods may occasionally result in highstrength when strong alkali is used, but the quality of the fabricated geopolymers varies depending on the type of coal ash used, making the overall process less reproducible.…”

Section: Introductionmentioning

confidence: 99%

Compressive Strength Properties of Geopolymers from Pond Ash and Possibility of Utilization as Synthetic Basalt

Kim¹,

Lee²,

Chon³

et al. 2019

J. Korean Ceram. Soc

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Pond ash is a mixture of mostly coarser fly ash and bottom ash. The recycling rate of pond ash is low because pond ash is mixed with seawater and deposited in ponds. The pond ash is also subjected to natural weathering over a period of time. In this study, we investigated whether pond ash can be used as a raw material of geopolymers, without any purification process or through a minimal purification process. In addition, we investigated whether synthetic basalt made by adding foaming agent to geopolymer or casting it into a mold can show the surface of the natural basalt as it is. The highest 7-day compressive strength in geopolymers from pond ash without purification process was 26 MPa. The highest 7-day compressive strength in geopolymers from pond ash with impurities removed through dry sieve analysis was found to improve to 80 MPa. On the other hand, synthetic basalt made with geopolymer was shown to be more advantageous aesthetically when produced by casting it in a silicone mold rather than by adding a foaming agent. Non-purified pond ash can be made into geopolymers having low strength. Pond ash purified by sieving can, without use of an aggregate, be made into geopolymer having high-strength. Also, it is possible to produce synthetic basalt with the same appearance as natural basalt and sufficient strength for commercialization. This process will contribute to the mass consumption and recycling of pond ash.

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Development of Novel Constructional Material from Industrial Solid Waste as Geopolymer

Cited by 12 publications

References 7 publications

Investigation of Setting Time and Flowability of Geopolymer Mortar Using Local Industry and Agriculture Waste as Precursor in Indonesia

Investigation of Setting Time and Flowability of Geopolymer Mortar Using Local Industry and Agriculture Waste as Precursor in Indonesia

Synthesis and Characterizations of High Carbon Ferrochrome (HCFC) Slag Based Geopolymer

Compressive Strength Properties of Geopolymers from Pond Ash and Possibility of Utilization as Synthetic Basalt

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