Incorporation of Micronized Polyethylene Terephthalate in Structural Concrete Blocks

Mendonça, Ana Maria Gonçalves Duarte; Neto, Osires de Medeiros Melo; Rodrigues, John Kennedy Guedes; Luz, Priscila Maria Sousa Gonçalves; Guerra, Thamires Dantas; Lima, Robson Kel Batista de

doi:10.1007/s40996-023-01111-z

Iran J Sci Technol Trans Civ Eng

2023

DOI: 10.1007/s40996-023-01111-z

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Incorporation of Micronized Polyethylene Terephthalate in Structural Concrete Blocks

Ana Maria Gonçalves Duarte Mendonça

Osires de Medeiros Melo Neto

John Kennedy Guedes Rodrigues

et al.

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2024

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Cited by 2 publications

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Study on the Chloride–Sulfate Resistance of a Metakaolin-Based Geopolymer Mortar

Cheng,

Qin,

Yao

et al. 2024

Materials

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The chloride–sulfate corrosion environment of concrete is a significant engineering problem. This paper investigates the effect of the complete/semi–immersion mode on the durability of concrete in a chloride–sulfate environment by using different granulated blast furnace slag (GBFS) dosage rates (10–50%) of a metakaolin (MK)-based geopolymer mortar. The chloride–sulfate corrosion environment is discussed by analyzing the apparent morphology, mass change, and mechanical property change in specimens at the age of 120 d of erosion combined with XRD and SEM. The high Ca content in GBFS has an important effect on the strength and erosion resistance of the metakaolin geopolymer (MGP) group mortar; an increase in the GBFS dosage makes the MGP group mortar denser, and the initial strength of the MGP group mortar is positively correlated with the dosage of GBFS. After 120 d of erosion, the GBFS dosage is negatively correlated with erosion resistance, with the high GBFS dosage groups showing more severe damage. Semi-immersion resulted in more severe deterioration at the immersion–evaporation interface zone due to the difference in the ionic concentration and the ‘wick effect’ at the immersion–evaporation interface zone. Compared with the commonly used OPC mortar, the M40 and M50 groups have improved strength and corrosion resistance and are suitable for engineering environments in highly erosive areas.

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Study on the Chloride–Sulfate Resistance of a Metakaolin-Based Geopolymer Mortar

Cheng,

Qin,

Yao

et al. 2024

Materials

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Micronized PET as a green additive for lime stabilization of swelling soil

Silvani,

Souza Júnior,

Lima

et al. 2024

Cad. Pedagógico

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The use of Polyethylene Terephthalate (PET) as an additive in the stabilization of swelling soils is a sustainable option considering the increasing environmental pollution caused by improper disposal of plastic waste. Given the limited capacity of recycling programs, incorporating these materials in construction can be a viable solution. In the conducted study, compacted mixtures of soil-lime-PET were prepared at different dry unit weights (14, 15 and 16 kN/m³). Micronized PET was used with percentages of 5% and 10%, while hydrated lime was added at 0%, 2%, 4%, and 6%, both by dry mass. These mixtures were subjected to one-dimensional swelling tests. The results showed that the PET content, lime content, and porosity are significant factors influencing the behavior of compacted mixtures. The index porosity/volumetric lime content adjusted by an exponent (ƞ/(Liv)-0,26) can link the one-dimensional swelling behavior. The combination of both materials creates a sustainable solution for controlling soil swelling.

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Incorporation of Micronized Polyethylene Terephthalate in Structural Concrete Blocks

Cited by 2 publications

References 42 publications

Study on the Chloride–Sulfate Resistance of a Metakaolin-Based Geopolymer Mortar

Study on the Chloride–Sulfate Resistance of a Metakaolin-Based Geopolymer Mortar

Micronized PET as a green additive for lime stabilization of swelling soil

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