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首页> 外文期刊>Magazine of Concrete Research >Early-age strength development in fly ash blended cement composites: investigation through chemical activation
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Early-age strength development in fly ash blended cement composites: investigation through chemical activation

机译：粉煤灰混合水泥复合材料的早期强度发展：通过化学活化的研究

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To achieve sustainability in construction, research is currently geared up to utilise more fly ash (FA) in cement. The low early-age strength development of FA-cement composite prevents its broader acceptance and usage in the construction sector. Many attempts have been made by various researchers, including through the use of chemical accelerators, to eliminate this well-known disadvantage of FA-cement composites. This study aims to investigate the influence of various non-chloride chemical accelerators such as calcium formate, calcium nitrate and calcium carbonate in altering the hydration products formed at various replacement levels of FA. The influence of chemical accelerators on two major compounds - tricalcium silicate (C3S) and tricalcium aluminate (C(3)A) - that are mainly responsible for early-age strength development are discussed in this study. It is found that all the chemical accelerators can be safely used to improve the early-age strength of FA-cement composites at least to the level of 35% of FA replacement prescribed by the existing codes without compromising the long-term strength.
机译：为了实现建筑的可持续性，目前正在加紧研究以在水泥中使用更多的粉煤灰（FA）。 FA-水泥复合材料早期强度低的发展阻碍了其在建筑领域的广泛接受和使用。各种研究人员已经进行了许多尝试，包括通过使用化学促进剂来消除FA-水泥复合材料这一众所周知的缺点。这项研究旨在研究各种非氯化物化学促进剂（例如甲酸钙，硝酸钙和碳酸钙）在改变FA各种取代水平下形成的水合产物中的影响。在本研究中，讨论了化学促进剂对两个主要化合物硅酸三钙（C3S）和铝酸三钙（C（3）A）的影响。发现所有化学促进剂可以安全地用于改善FA-水泥复合材料的早期强度，至少达到现有法规规定的FA替代的35％的水平，而不会损害长期强度。

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