Global efforts to minimise carbon dioxide emissions are also leading to attempts to use calcined clays (CC) as a partial substitute for cement in concrete. While the hydration mechanism of such CC blended cements is now well understood, the range of effective admixtures like polycarboxylate ethers (PCE) is limited. There are PCE types that promise relatively high effectiveness, but the mechanisms of action are not yet sufficiently understood. For a detailed understanding of the adsorption of such PCEs, spatially resolved studies of the binder were performed using a combination of fluorescence and scanning electron microscopy. In a comparison of two superplasticisers, the investigations have shown different sites of preferred adsorption in a CC blended system and the results can be correlated with flow tests and setting behaviour. The investigations have shown that a certain PCE type has a higher adsorption on CC and other components of a blended system in comparison to other types.

中文翻译：

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荧光显微镜研究四氯乙烯高效减水剂在煅烧粘土混合水泥中的吸附

全球为尽量减少二氧化碳排放而做出的努力也促使人们尝试使用烧粘土 (CC) 作为混凝土中水泥的部分替代品。虽然这种 CC 混合水泥的水化机理现在已被充分了解，但聚羧酸醚 (PCE) 等有效外加剂的范围仍然有限。有些类型的 PCE 具有相对较高的有效性，但其作用机制尚未得到充分了解。为了详细了解此类 PCE 的吸附，结合使用荧光和扫描电子显微镜对粘合剂进行了空间分辨研究。在对两种超增塑剂的比较中，研究显示了 CC 混合系统中不同的优先吸附位点，并且结果可以与流动测试和凝固行为相关。研究表明，与其他类型相比，某种类型的 PCE 对 CC 和混合系统的其他组分具有更高的吸附力。