Alkanolamines as grinding aids and hydration enhancers in blended cements with iron-rich non-ferrous metallurgy slag

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Construction and Building Materials Pub Date : 2025-04-04 Epub Date: 2025-02-28 DOI:10.1016/j.conbuildmat.2025.140575

Vincent Hallet , Tobias Hertel , Lies Eykens , Nele De Belie , Yiannis Pontikes

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Abstract

Iron-rich non-ferrous metallurgy slags have been shown to react in cementitious systems. However, grinding of these slags is energy intensive. Therefore, this work investigates the use of secondary (diethanolamine, diisopropanolamine) and tertiary (triethanolamine, triisopropanolamine) alkanolamines as grinding aid (0.025 wt%) for a non-ferrous metallurgy slag and in blended cements with this slag. Improved grinding efficiency of up to 8 % was found. Enhanced slag dissolution was observed for all types, albeit stronger for tertiary variants. The impact on the hydration of blended cements with these slags was studied by addition in the mixing water or by using slag ground with alkanolamines. Increased slag reaction in the presence of alkanolamines was confirmed, forming additional, water-binding, cementitious phases. Yet, compressive strength was either minimally affected (secondary) or decreased (tertiary) when alkanolamines were added in the mixing water. Used as grinding aids, tertiary alkanolamines increased (+5–13 %) the 28 day compressive strength instead.

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烷醇胺作为富铁有色冶金渣混合水泥的助磨剂和水化增强剂

富铁有色冶金渣已被证明在胶凝体系中发生反应。然而，这些炉渣的研磨是能源密集型的。因此，这项工作研究了二级（二乙醇胺，二异丙醇胺）和三级（三乙醇胺，三异丙醇胺）烷醇胺作为有色冶金渣和与该渣混合的水泥的助磨剂（0.025 wt%）的使用。磨矿效率可达8 %。所有类型都观察到增强的渣溶解，尽管三级变异更强。研究了在混合水中添加或在矿渣中添加烷醇胺对混合水泥水化性能的影响。在烷醇胺存在的情况下，矿渣反应增加，形成额外的水结合胶凝相。然而，当在混合水中加入烷醇胺时，抗压强度受到最小影响（二级）或降低（三级）。作为助磨剂，叔烷醇胺反而提高了28 天的抗压强度（+ 5-13 %）。

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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.