Unveiling the key factors for clinker reactivity and cement performance: A physic-chemical and performance investigation of 40 industrial clinkers

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

Cement and Concrete Research Pub Date : 2024-11-14 DOI:10.1016/j.cemconres.2024.107717

J.S. Andrade Neto , I.C. Carvalho , P.J.M. Monteiro , P.R. de Matos , A.P. Kirchheim

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Abstract

This study assessed 40 industrial clinkers from 16 cement plants, determining their physical, chemical, and mineralogical properties and the corresponding cements' strength development and hydration kinetics. Pearson's statistical analysis identified key factors influencing clinker and cement properties. Clinker composition ranged within 56.5–73.9% C₃S, 4.1–24.5% C₂S, 0.8–8.4% C₃A, and 7.4–13.9% C₄AF. The sulfate-alkali ratio significantly impacted C₃A content and polymorphism. Alite crystal size was directly influenced by the CaO content and the sulfate-alkali ratio and inversely by the MgO, K₂O, and F⁻ contents. Clinker grindability was directly affected by the C₃S crystal size and the sulfate-alkali ratio while inversely impacted by the MgO and K₂O contents. Key parameters for early cement hydration included fineness and K₂O content (positive) and C₃S crystal size (negative); larger C₃S crystal size negatively affected cement early strength, while MnO₂ and K₂O presence improved 1-day strength. For 28-day strength, increasing cement fineness and K₂O content were detrimental.

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揭示熟料反应性和水泥性能的关键因素：40 种工业熟料的物理化学和性能调查

本研究评估了来自 16 家水泥厂的 40 种工业熟料，确定了它们的物理、化学和矿物学特性以及相应水泥的强度发展和水化动力学。皮尔逊统计分析确定了影响熟料和水泥性能的关键因素。熟料成分范围为 56.5-73.9% C₃S、4.1-24.5% C₂S、0.8-8.4% C₃A、7.4-13.9% C₄AF。硫酸-碱比例对 C₃A 含量和多态性有显著影响。白云石晶体大小受 CaO 含量和硫酸盐-碱比率的直接影响，与 MgO、K₂O 和 F- 含量成反比。熟料可磨性受 C₃S 结晶粒度和硫酸-碱比率的直接影响，而与 MgO 和 K₂O 含量成反比。水泥早期水化的关键参数包括细度和 K₂O 含量（正向）以及 C₃S 结晶尺寸（负向）；较大的 C3S 结晶尺寸对水泥早期强度有负面影响，而 MnO2 和 K2O 的存在则提高了 1 天强度。对于 28 天强度而言，水泥细度和 K2O 含量的增加是不利的。

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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.