废铁矿尾矿在石灰石煅烧粘土水泥（LC3）复合材料中的应用

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-10-08 DOI:10.1016/j.conbuildmat.2025.143850

R.S. Krishna , Subhabrata Mishra , Sibangi Rath , Daud Ahmad , Syed Mohammed Mustakim , Prabhas Chandra Beuria , Cheng Jiang

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引用次数: 0

摘要

本研究研究了热处理后的废铁矿尾矿（IOTs）在800℃下，通过煅烧和还原焙烧的方式，作为煅烧粘土在石灰石煅烧粘土水泥（LC3）粘结剂体系中的相容性和性能。物联网的还原焙烧对LC3砂浆和膏体基体的性能有积极的影响。在LC3 - 75和LC3 - 50粘结剂体系中替换煅烧粘土的28天抗压强度分别为43.44 MPa和40.49 MPa，而商用LC3的抗压强度为34.28 MPa。表征结果表明，IOT-RR促进了AFm相和C-(A)- s - h凝胶的形成，从而促进了机械强度和孔隙细化的发展。本研究促进了矿山废物在水泥生产中的有效整合，并为铁矿开采部门的废物增值和零废物提供了一种新的方法。

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Waste iron ore tailings (IOTs) in limestone calcined clay cement (LC3) composites

This study investigates the compatibility and performance of thermally treated waste iron ore tailings (IOTs) at 800°C, with calcination and reduction roasting methods, as calcined clays in Limestone Calcined Clay Cement (LC3) binder system. The reduction roasting of IOTs positively impacted the properties of the LC3 mortar and paste matrix. The replacement of calcined clay in the LC3–75 and LC3–50 binder systems resulted in a 28-day compressive strength of 43.44 MPa and 40.49 MPa, respectively, compared to 34.28 MPa of commercial LC3. Characterisation results disclosed that IOT-RR contributed to the development of AFm phases and C-(A)-S-H gel, which contributed to the development of mechanical strength and pore refinement. This research investigation promotes the effective integration of mine wastes in cement production and offers a novel approach to waste valorisation and obtaining zero waste in the iron mining sector.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.