Exploring natural siderite (FeCO3) as a novel supplementary cementitious material

IF 10.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement and Concrete Research Pub Date : 2025-06-25 DOI:10.1016/j.cemconres.2025.107975

Florian Mittermayr , Florian Steindl , Marjorie Pons Pineyro , Lukas Briendl , Marlene Sakoparnig , Isabel Galan

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引用次数: 0

Abstract

This study investigates siderite (FeCO₃) as a novel supplementary cementitious material (SCM) in ordinary Portland cement (OPC) systems. Freshly ground siderite significantly retards early hydration of C₃S and C₃A, primarily due to the formation of iron hydroxide that temporarily inhibits hydration. However, this effect diminishes over time, with hydration degrees and strength development at later stages (≥90 days) matching or exceeding those of systems with inert fillers. Siderite undergoes a “ferrolanic” reaction, consuming portlandite and forming hydrated Fe-bearing phases, influenced by redox conditions. Additionally, siderite improves concrete durability, reducing calcium leaching and potentially enhancing sulfate resistance through stabilized ettringite and Fe/Al solid solution phases. This research is the first comprehensive exploration of siderite as an SCM, highlighting its potential to address SCM shortages and contribute to CO₂ reduction in cement production. Further research is needed to evaluate long-term durability and practical applications in cementitious systems.

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探索天然菱铁矿（FeCO3）作为新型补充胶凝材料

本研究研究了铁铁矿（FeCO₃）作为普通硅酸盐水泥（OPC）体系中的一种新型补充胶凝材料（SCM）。刚磨碎的铁黄铁矿显著地延缓了C₃S和C₃A的早期水化，这主要是由于氢氧化铁的形成暂时抑制了水化。然而，随着时间的推移，这种影响逐渐减弱，后期（≥90天）的水化程度和强度发展与惰性填料的体系相当或超过。菱铁矿在氧化还原条件的影响下发生“铁-亚铁”反应，消耗波特兰铁矿并形成含水含铁相。此外，菱铁矿提高混凝土耐久性，减少钙浸出，并通过稳定钙矾石和铁/铝固溶体相潜在地增强硫酸盐抗性。该研究首次对菱铁矿作为SCM进行了全面探索，强调了其解决SCM短缺的潜力，并有助于减少水泥生产中的二氧化碳排放。需要进一步的研究来评估其在胶凝系统中的长期耐久性和实际应用。

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来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.