Na₃PO₄对碱激发高炉矿渣水化过程的影响

Effect of Na₃PO₄ on the Hydration Process of Alkali-Activated Blast Furnace Slag.

作者信息

Kalina Lukáš, Bílek Vlastimil, Novotný Radoslav, Mončeková Miroslava, Másilko Jiří, Koplík Jan

机构信息

Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Brno 612 00, Czech Republic.

出版信息

Materials (Basel). 2016 May 20;9(5):395. doi: 10.3390/ma9050395.

DOI:10.3390/ma9050395

PMID:28773518

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5503029/

Abstract

In recent years, the utilization of different non-traditional cements and composites has been increasing. Alkali-activated cementitious materials, especially those based on the alkali activation of blast furnace slag, have considerable potential for utilization in the building industry. However, alkali-slag cements exhibit very rapid setting times, which are too short in some circumstances, and these materials cannot be used for some applications. Therefore, it is necessary to find a suitable retarding admixture. It was shown that the sodium phosphate additive has a strong effect on the heat evolution during alkali activation and effectively retards the hydration reaction of alkali-activated blast furnace slag. The aim of the work is the suggestion of a reaction mechanism of retardation mainly based on Raman and X‑ray photoelectron spectroscopy.

摘要

近年来，不同非传统水泥和复合材料的使用量一直在增加。碱激活胶凝材料，尤其是基于高炉矿渣碱激活的材料，在建筑行业具有相当大的应用潜力。然而，碱矿渣水泥的凝结时间非常快，在某些情况下太短，这些材料不能用于某些应用。因此，有必要找到一种合适的缓凝剂。结果表明，磷酸钠添加剂对碱激活过程中的热量释放有很强的影响，并能有效延缓碱激活高炉矿渣的水化反应。这项工作的目的是主要基于拉曼光谱和X射线光电子能谱提出一种缓凝反应机理。