Durability analysis of pozzolanic cements containing recycled track ballast: Sustainability under extreme environmental conditions

García, Santiago Yagüe; Gaya, Cristina González

doi:10.1016/j.conbuildmat.2020.117999

Cited by 9 publications

(2 citation statements)

References 17 publications

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“…Therefore, planned maintenance cycles [1] and the systematic study of particle rounding are necessary to control the mosaic effect of piled gravel [2,3]. Worn ballast, generated in large volumes, becomes residual material that can be used as cementitious material for the manufacture of eco-efficient green cements, reducing the environmental footprint of cement industries [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…The storage of track-ballast waste in landfills continues to cause serious environmental and socio-economic problems [10]. However, despite the novelty of the preliminary works for its incorporation into the life cycle of the materials, an in-depth study of the kinetics of the pozzolanic reaction, the evolution of the hydrated phases, and their stability is necessary-a step fundamental to establish the scientific bases for the future use of these waste products as pozzolans [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Construction and Demolition Waste Ballast as a Pozzolanic Addition in Binary Cements: Characterization and Thermodynamic Stability

Yagüe-García,

García-Giménez

2024

Minerals

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The use of raw materials from the recovery of construction waste is frequent. In this study, the waste is obtained from degraded railway ballast, made up of siliceous minerals. This material is added directly to the mixtures to replace part of the cement, forming a good quality cementitious product. The pozzolanic reaction is studied within the waste/lime system in a solid phase and water system for one year. Reaction products such as stratlingite, layered double hydroxide-type compounds, hydrated tetracalcic aluminate, and gels appear. The formation of stratlingite and gels was favored throughout the reaction. The reaction was monitored, calculating the saturation index.

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