Abstract
<jats:p>The most energy-intensive stage in cement production is the clinker grinding process. Therefore, increasing the efficiency of the cement grinding process involves optimizing this operation. Currently, various additives are widely used to improve the efficiency of the cement grinding process, namely accelerators based on gypsum, plasticizers and superplasticizers, graphite compounds, silicon-organic compounds, and bi-component accelerators. This work presents the method for obtaining accelerators produced from gas processing residues in a methyl diethanolamine base, the physicochemical characteristics of the resulting accelerators, and the results of studies on their effect on the strength gain kinetics of cement paste. The results of the study showed that the purity of the purified methyldiethanolamine (MDEA) is very high and that the proposed method is highly effective. The results of particle size determination for the modified cement showed that the modified cement particles were spherical in shape. The maximum laser diffraction efficiency is 13.5%, the intensity is 88%, and the particle size mainly reaches up to 2 µm, accounting for over 53.5%. The proportion of particles in the 100–200 µm range is 4.87%. In the X-ray diffraction patterns of the modified samples, a slight decrease in the diffraction intensity of the calcium silicate phases (C3S and C2S) is observed, The increase in the diffraction intensity of the calcium hydroxide phase (Ca(OH)₂) indicates the formation of calcium hydroxide and calcium silicate hydrate (C-S-H) during cement hydration. These changes indicate that a phase transformation occurs within the cement during hydration, and that important phases are formed to enhance strength. </jats:p>