Rogojsz Grzegorz, Rudnicki Tomasz
Faculty of Civil Engineering and Geodesy, Military University of Technology, 2 Gen. Sylwestra Kaliskiego Str., 00-908 Warsaw, Poland.
Materials (Basel). 2024 Dec 24;18(1):7. doi: 10.3390/ma18010007.
In this article, the authors present the results of their research on assessing the effect of selected mineral additives on the alkaline reactivity of aggregates. The main objective of this research was to check whether the reactivity of aggregates that do not meet the standard requirements can be reduced. Due to the decreasing availability of crushed aggregates and the decreasing resources of sand used for cement concrete road surfaces, solutions should be sought that allow the use of lower-grade aggregates. Among the available mineral additives, dense microsilica, white microsilica, limestone flour, glass flour, basalt flour, and glass granulate were selected. Laboratory tests were carried out in accordance with the requirements for testing the alkaline reactivity of road aggregates in NaOH solution applicable in Poland. The tests included the use of mineral additives in the amounts of 10% and 20%. Based on the research conducted, it was observed that the most beneficial effect was obtained with the addition of white microsilica, for which a decrease in aggregate reactivity was observed by 76.7% for 10% of the additive and 95.8% for 20% of the content. The least beneficial effect, on the other hand, was the use of compacted microsilica, for which an increase in alkaline reactivity was observed by 9.3% for 10% of the additive and 20.9% for 20% of the additive. The research conducted shows that the alkaline reactivity of the aggregate can be reduced, due to which it is possible to use reactive aggregates for the construction of road surfaces made of cement concrete.
在本文中，作者展示了他们关于评估选定矿物添加剂对集料碱性反应性影响的研究结果。这项研究的主要目的是检验不符合标准要求的集料的反应性是否能够降低。由于碎集料的可获得性不断下降以及用于水泥混凝土路面的砂资源日益减少，应寻求能够允许使用低等级集料的解决方案。在可用的矿物添加剂中，选择了致密微硅粉、白色微硅粉、石灰石粉、玻璃粉、玄武岩粉和玻璃颗粒。实验室测试是按照波兰适用的在氢氧化钠溶液中测试道路集料碱性反应性的要求进行的。测试包括使用10%和20%用量的矿物添加剂。基于所进行的研究，观察到添加白色微硅粉获得的效果最为显著，对于10%的添加剂用量，集料反应性降低了76.7%，对于20%的含量，降低了95.8%。另一方面，使用致密微硅粉的效果最不理想，对于10%的添加剂用量，碱性反应性增加了9.3%，对于20%的添加剂用量，增加了20.9%。所进行的研究表明，集料的碱性反应性可以降低，因此有可能将活性集料用于水泥混凝土路面的建设。
