水泥界面：当前的理解、挑战和机遇,Langmuir

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水泥界面：当前的理解、挑战和机遇
Langmuir ( IF 3.7 ) Pub Date : 2021-05-17 , DOI: 10.1021/acs.langmuir.1c00617
Ozge Heinz ₁ , Hendrik Heinz ₁

Affiliation

水泥和混凝土的需求正在迅速增长，并在颗粒界面、水合反应过程中提出了许多未解决的化学问题，涉及电解质和有机添加剂的作用。需要通过开发更环保、更可持续的配方来减少占全球 CO ₂ 11% 的高碳足迹的解决方案排放。水泥是一种多相材料，由硅酸钙、铝酸盐和其他矿物相组成，由天然和低成本工业来源生产，经过复杂的水合反应。这一观点突出了当前新化学洞察力的研究挑战和机遇，包括涉及矿物表面、电解质、聚合物和水合反应的有趣胶体和界面科学问题。具体而言，我们讨论了 (1) 水泥相、补充胶凝材料和其他成分的特征，(2) 水化反应以及成像和核磁共振光谱的表征，(3) 水合水泥相的结构，包括在(4) 从原子尺度到微尺度动力学模型的定量模拟技术，(5)有机添加剂的作用。着眼于新方向，我们解释了整合无机化学、酸碱化学、聚合物化学、反应机制和理论的知识来描述制造过程中中尺度水泥特性和整体特性的好处。

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Cement Interfaces: Current Understanding, Challenges, and Opportunities

Cement and concrete are rapidly growing in demand and pose many unresolved chemistry questions at particle interfaces, during hydration reactions, regarding the role of electrolytes and organic additives. Solutions through developing greener, more sustainable formulations are needed to reduce the high carbon footprint that amounts to 11% of global CO₂ emissions. Cement is a multiphase material composed of calcium silicates, aluminates, and other mineral phases, produced from natural and low-cost industrial sources, which undergoes complex hydration reactions. This perspective highlights current research challenges and opportunities for new chemistry insight, including intriguing colloid and interface science problems that involve mineral surfaces, electrolytes, polymers, and hydration reactions. Specifically, we discuss (1) characteristics of cement phases, supplementary cementitious materials, and other constituents, (2) hydration reactions and the characterization by imaging and NMR spectroscopy, (3) the structure of hydrated cement phases including calcium–silicate–hydrates at different scales, (4) quantitative simulation techniques from the atomic scale to microscale kinetic models, and (5) the function of organic additives. Focusing on new directions, we explain the benefits of integrating knowledge from inorganic chemistry, acid–base chemistry, polymer chemistry, reaction mechanisms, and theory to describe mesoscale cement properties and bulk properties upon manufacturing.

更新日期：2021-06-01

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