A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Geopolymers Based on Recycled Glass Powder for Soil Stabilization
https://orcid.org/0000-0001-7740-1679
https://orcid.org/0000-0002-6290-1520
https://orcid.org/0000-0003-3652-5477
https://orcid.org/0000-0003-4804-8110
Abstract Tensile cracks are the first failures to appear in shallow foundations and pavement layers. Although cementing agents, such as cement, increase the tensile strength considerably, occasionally, it is not enough. Therefore, it is necessary to improve the tensile properties of cemented soils. Glass powder (GP) is a municipal waste discarded in landfills. Due to its high content of silica in the amorphous phase, it is a waste with promising use as a precursor of geopolymers. Thereby, the disposal of GP to landfills can be avoided. Therefore, this article investigates the enhancement of split tensile strength (qt) and durability against wet-dry cycles of compacted soil–cement blends by adding recycled glass powder (GP) in three quantities by weight: 5%, 15%, and 30%. It was employed curing times of 7, 28, and 90 days to study the evolution of qt. The results presented a direct relation of qt, and indirect relation of Accumulated Loss of Mass (ALM) of the blends with the amount of GP added, amount of cement (C), curing time (t) and molding dry unit weight ($ γ_{d} $). All ALM and qt values were dependent on the porosity/cement index (η/$ C_{iv} $). To match the relationship rates of ALM–η/$ C_{iv} $ and qt−η/$ C_{iv} $, it was necessary to adjust $ C_{iv} $ to an exponent x = 0.22. Thus, control and dosage equations of ALM and qt were proposed depending on $$\eta /C_{\text{iv}}^{0.22}$$ index. The microstructure evolution of the mixtures was also improved as the amount of GP increased. Finally, the results demonstrated that GP is a sustainable binder that improves the engineering properties of poor soils and makes them suitable for potential use in pavement layers.
Geopolymers Based on Recycled Glass Powder for Soil Stabilization
https://orcid.org/0000-0001-7740-1679
https://orcid.org/0000-0002-6290-1520
https://orcid.org/0000-0003-3652-5477
https://orcid.org/0000-0003-4804-8110
Abstract Tensile cracks are the first failures to appear in shallow foundations and pavement layers. Although cementing agents, such as cement, increase the tensile strength considerably, occasionally, it is not enough. Therefore, it is necessary to improve the tensile properties of cemented soils. Glass powder (GP) is a municipal waste discarded in landfills. Due to its high content of silica in the amorphous phase, it is a waste with promising use as a precursor of geopolymers. Thereby, the disposal of GP to landfills can be avoided. Therefore, this article investigates the enhancement of split tensile strength (qt) and durability against wet-dry cycles of compacted soil–cement blends by adding recycled glass powder (GP) in three quantities by weight: 5%, 15%, and 30%. It was employed curing times of 7, 28, and 90 days to study the evolution of qt. The results presented a direct relation of qt, and indirect relation of Accumulated Loss of Mass (ALM) of the blends with the amount of GP added, amount of cement (C), curing time (t) and molding dry unit weight ($ γ_{d} $). All ALM and qt values were dependent on the porosity/cement index (η/$ C_{iv} $). To match the relationship rates of ALM–η/$ C_{iv} $ and qt−η/$ C_{iv} $, it was necessary to adjust $ C_{iv} $ to an exponent x = 0.22. Thus, control and dosage equations of ALM and qt were proposed depending on $$\eta /C_{\text{iv}}^{0.22}$$ index. The microstructure evolution of the mixtures was also improved as the amount of GP increased. Finally, the results demonstrated that GP is a sustainable binder that improves the engineering properties of poor soils and makes them suitable for potential use in pavement layers.
Geopolymers Based on Recycled Glass Powder for Soil Stabilization
https://orcid.org/0000-0001-7740-1679
https://orcid.org/0000-0002-6290-1520
https://orcid.org/0000-0003-3652-5477
https://orcid.org/0000-0003-4804-8110
Abstract Tensile cracks are the first failures to appear in shallow foundations and pavement layers. Although cementing agents, such as cement, increase the tensile strength considerably, occasionally, it is not enough. Therefore, it is necessary to improve the tensile properties of cemented soils. Glass powder (GP) is a municipal waste discarded in landfills. Due to its high content of silica in the amorphous phase, it is a waste with promising use as a precursor of geopolymers. Thereby, the disposal of GP to landfills can be avoided. Therefore, this article investigates the enhancement of split tensile strength (qt) and durability against wet-dry cycles of compacted soil–cement blends by adding recycled glass powder (GP) in three quantities by weight: 5%, 15%, and 30%. It was employed curing times of 7, 28, and 90 days to study the evolution of qt. The results presented a direct relation of qt, and indirect relation of Accumulated Loss of Mass (ALM) of the blends with the amount of GP added, amount of cement (C), curing time (t) and molding dry unit weight ($ γ_{d} $). All ALM and qt values were dependent on the porosity/cement index (η/$ C_{iv} $). To match the relationship rates of ALM–η/$ C_{iv} $ and qt−η/$ C_{iv} $, it was necessary to adjust $ C_{iv} $ to an exponent x = 0.22. Thus, control and dosage equations of ALM and qt were proposed depending on $$\eta /C_{\text{iv}}^{0.22}$$ index. The microstructure evolution of the mixtures was also improved as the amount of GP increased. Finally, the results demonstrated that GP is a sustainable binder that improves the engineering properties of poor soils and makes them suitable for potential use in pavement layers.
Geopolymers Based on Recycled Glass Powder for Soil Stabilization
de Jesús Arrieta Baldovino, Jair (author) / dos Santos Izzo, Ronaldo (author) / Rose, Juliana Lundgren (author) / Avanci, Mônica Angélica (author)
2020
Article (Journal)
Electronic Resource
English
BKL:
57.00$jBergbau: Allgemeines
/
38.58
Geomechanik
/
57.00
Bergbau: Allgemeines
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
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