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

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Construction and Building Materials Pub 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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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.