Increase of Wear Resistance and Strength of Cementing Mortars Due to Stabilizing Fine-Dispersed Additives of Metallurgical Sludge
Abstract
The main aim of this study is to determine the efficiency of enhancement of the strength and heat-resistant characteristics of cementing mortars by addition of metallurgical sludge in the form of iron oxide powder, which is a waste product in steel production, to the composition of a finely dispersed fraction. The use of stabilizing strengthening additives is due to the need to increase the strength properties of cementing solutions, especially those that are used in extreme conditions, at high temperatures and high loads, creating pressure on the formations. At the same time, the use of expensive strengthening stabilizers increases the cost of manufacturing cementing solutions, which in turn leads to an increase in the cost of the entire process of creating oil wells. According to the data presented, the use of finely dispersed and ultra-finely dispersed fractions of metallurgical sludge in the form of hematite powder leads to an increase in the strength properties of cementing solutions, and also increases resistance to long-term thermal heating due to an increase in resistance to high-temperature degradation associated with cracking and embrittlement. It was also determined that the transition from a finely dispersed fraction and an ultrafinely dispersed fraction leads to an increase in strength properties, which makes it possible to reduce the consumption of the stabilizing strengthening additive powder while maintaining strength characteristics.