Szczegóły publikacji
Opis bibliograficzny
Carbon dioxide sequestration and sustainable binder development using processed calcareous gaize / S. KUCHARCZYK, P. STĘPIEŃ, W. PICHÓR, K. Widlarz // Journal of Cleaner Production ; ISSN 0959-6526. — 2025 — vol. 520 art. no. 146108, s. 1–12. — Bibliogr. s. 10–12, Abstr. — Publikacja dostępna online od: 2025-07-06
Autorzy (4)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 162323 |
|---|---|
| Data dodania do BaDAP | 2025-09-12 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.jclepro.2025.146108 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Cleaner Production |
Abstract
This study explore the potential of processed calcareous gaize (CG) as a precursor for carbonatable calcium silicate clinkers, offering a pathway for carbon dioxide sequestration in construction materials. CG, a naturally occurring sedimentary rock rich in calcium carbonate and silica, was thermally processed at varying temperatures (900–1200 °C) to produce clinkers containing wollastonite, pseudowollastonite, belite, and lime. The synthesized clinkers were subjected to forced carbonation under temperature of 60 °C and pressure of 2.5 atm to evaluate their reactivity and carbon dioxide uptake potential. The carbonation efficiency was assessed using thermogravimetric analysis (TGA) and X-ray diffraction (XRD), while microstructural evolution was examined via scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP). Results indicate that clinkers fired at 1000 °C exhibited degree of carbonation over 90 % and mechanical strength, achieving a compressive strength of 106 MPa. The compressive strength of the rest of the samples varies between 25 MPa and 55 MPa. The process led to the formation of calcium carbonate phases, primarily calcite and vaterite. The degree of carbonation correlate with microstructural parameters, particularly porosity and pore distribution, rather than the total CaCO3 content alone. In addition, CG clinkers demonstrate significantly lower environmental impact compared to conventional Portland cement (PC) by reducing both energy consumption required for clinker production and CO2 emissions derived from raw materials decomposition (∼40 % and ∼30 % respectively). These findings demonstrate that CG-derived clinkers provide a viable and sustainable alternative to conventional cementitious binders by enabling effective CO2 sequestration while maintaining high mechanical performance. The study highlights the potential for optimizing the carbonation process to enhance binder properties, contributing to the reduction of the carbon footprint in the construction sector.
