Experimental study of the mechanical and durability properties of Slag and Calcined Clay based geopolymer composite

Gupta, Nakul; Saxena, Kuldeep K.

doi:10.1080/2374068x.2021.1948709

Cited by 14 publications

(8 citation statements)

References 31 publications

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“…Tetwo main factors which restrict the improvement of compressive strength, at higher weight percentages (40% and 60%) of PP embedded in concrete specimens, are (i) poor bonding between PP aggregate and concrete due to the development of agglomerations, (ii) the hydrophobic nature of PP aggregate that decreases the rate of hydration [31]. A similar kind of decrease in strength values with the addition of higher weight percentages of waste materials in the concrete is found in these articles [9,14,32].…”

Section: Resultsmentioning

confidence: 62%

Effects of Polypropylene Waste Addition as Coarse Aggregates in Concrete: Experimental Characterization and Statistical Analysis

Naveen

Naresh

Gowda

et al. 2022

Advances in Materials Science and Engineering

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In recent times, thermoplastic waste materials are being extensively used as fine and coarse aggregates in the concrete mix as an environmentally friendly construction material. This study aims at utilizing polypropylene (PP) as a partial substitute for the conventional coarse aggregates in M30 grade concrete. The different replacement levels of coarse aggregates such as 0%, 20%, 40%, and 60% by weight were used in concrete. Sieve analysis, specific gravity, and water absorption tests were performed in all replacement levels of aggregates. The mechanical (compressive and split tensile tests) tests were conducted after 3, 14, and 28 days. The change in mechanical properties of concrete with the addition of different weight proportions of plastics was studied experimentally. Further, experimental values were predicted using the two-parameter Weibull distribution and artificial neural network (ANN)-based statistical approaches. The Levenberg–Marquardt algorithm was used in predicting the mechanical properties using the ANN. A good correlation was obtained between the experimental and predicted values with an error (%) of less than 10. The decrease in mechanical properties with the increase in replacement levels of coarse aggregates in concrete was observed in both experimental and predicted approaches. This can be attributed to poor bonding between concrete and PP aggregate owing to the development of agglomerations and the hydrophobic nature of PP. However, the strength values of 20% PP-embedded concrete specimens are closer to 0% PP-embedded concrete specimens. Therefore, 20% PP-embedded concrete specimens can be used for primary load-bearing applications to utilize plastic waste and reduce the cost of the component.

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Section: Resultsmentioning

confidence: 62%

Effects of Polypropylene Waste Addition as Coarse Aggregates in Concrete: Experimental Characterization and Statistical Analysis

Naveen

Naresh

Gowda

et al. 2022

Advances in Materials Science and Engineering

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“…Moreover, calcium silicate hydrate abundant in OPC reacts with sulfuric acid to form SiO2 in an aqueous state weakening the structure's strength (equations 5 & 6). [146] A subsequent study examining the mechanical and durability characteristics of a geopolymer composite made of slag and calcined clay demonstrated a similar resistance of geopolymer concrete to acid attack. The researchers studied performance at 7, 28, and 56 days using 5% sulfuric and 5% magnesium sulfate.…”

Section: Sulphate Attackmentioning

confidence: 94%

A Review on Selected Durability Parameters on Performance of Geopolymers Containing Industrial By-products, Agro- Wastes and Natural Pozzolan

MUTUNGA¹,

MUHAMMED²,

NGUİ

et al. 2022

Journal of Sustainable Construction Materials and Technologies

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The applications of geopolymers as cementitious systems are becoming an alternative source of cement daily. The use of potentially suitable aluminosilicate inorganic waste materials incorporated with agro-industrial waste in the production of suitable geopolymer binders has been reported. Calcined clay and some agro-waste ash, such as coconut shells, are examples of aluminosilicate materials that exhibit strong pozzolanic activity because of their high silica-alumina composition. The pozzolanic reaction is primarily caused by the amorphous silica present in properly burned agricultural waste and clay. Based on a variety of available literature on concrete and mortar including geopolymers synthesized from agro-industrial waste, a critical review of raw materials and the mechanism of synthesis of the geopolymer has been outlined in this work. Additionally, the durability characteristics of agro-industrial waste geopolymer concrete and mortar, including resistance to chloride, corrosion, sulfate, acid attack, depth of carbonation, water absorption, thermal resistivity, Creep and drying shrinkage, are briefly reviewed.

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“…It has been established that the addition of polymer fibres to a geopolymer composite may significantly increase both the strength and toughness of the composite. [83][84][85][86] Various polymer fibres are common kinds of materials that are used to reinforce the geopolymer matrix.…”

Section: Ultrasonic Pulse Velocity Test (Upvt)mentioning

confidence: 99%

Investigation on the impact of elevated temperature on sustainable geopolymer composite

Verma,

Meena,

Singh

et al. 2023

Advances in Mechanical Engineering

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Geopolymer concrete (GPC) is an eco-friendly, sustainable, cementless and green concrete. It could be an alternative to the conventional concrete. In alkaline circumstances, the alumina and silica concentration in geopolymer concrete creates the geopolymer bond, while regular concrete creates C-S-H (calcium silicate hydrate bond). The final result of the geopolymer bond does not include any water. At elevated temperatures, geopolymer concrete would thus be more stable. Due to its greater strength and durability quality, geopolymer concrete may be the ideal replacement for ordinary portland cement (OPC) concrete. This research intends to examine how specimens of geopolymer concrete and regular concrete respond to exposure to increased temperatures between 100°C and 800°C. Mass loss, ultrasonic pulse velocity, compressive strength, X-ray diffraction, thermogravimetric analysis and derivative thermogravimetric analysis were all examined throughout the experimental examination. Both concrete specimens lose mass or weight as the exposure temperature rises; OPC concrete samples spalls at 600°C, while GPC sample fail at 800°C. GPC specimens lose around 12% of their original mass after being exposed to temperatures of 800°C, while OPC specimens lose about 7%. The GPC specimens maintained 60% of their initial compressive strength after being exposed to a temperature of 700°C, but the OPC concrete specimens only kept 52%. With each increase in exposure to extreme temperatures, the peaks of quartz and cristobalite are lowered. Only the form or structure of the mineral oxide would change; the chemical linkages would remain. The GPC samples subjected to temperatures of 100°C exhibit effective thermal stability than all other specimens exposed to extreme temperatures. As the exposure temperature rises, the GPC specimens become more thermally stable. According to the experimental findings, the GPC specimens’ bonding structure makes them more resistant to high temperatures than regular concrete specimens. Micropores are present in the voids of the geopolymer matrix, while mesopores and micropores are present in the voids of the OPC matrix. While OPC bonding is C-S-H formed by the hydration of lime and silica contained in the cement, the geopolymer bonding did not include the water content in the final or end result of geopolymerisation for strengthening.

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Experimental study of the mechanical and durability properties of Slag and Calcined Clay based geopolymer composite

Cited by 14 publications

References 31 publications

Effects of Polypropylene Waste Addition as Coarse Aggregates in Concrete: Experimental Characterization and Statistical Analysis

Effects of Polypropylene Waste Addition as Coarse Aggregates in Concrete: Experimental Characterization and Statistical Analysis

A Review on Selected Durability Parameters on Performance of Geopolymers Containing Industrial By-products, Agro- Wastes and Natural Pozzolan

Investigation on the impact of elevated temperature on sustainable geopolymer composite

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