## 4 Conclusions  
1. We carried out research on the efficiency of diatomite and bentonite on the characteristics of local loam, aiming to develop ceramic masses for the manufacturing of bricks with improved physical and mechanical characteristics. 2. It was found that diatomite additives from the Zhalpak deposit decrease the average density of products and increase their compressive strength. Ceramic masses with the addition of 15% to 30% diatomite can be used to produce conditionally efficient wall materials with an average density ranging from 1410 to 1550 kg/m\({}^{3}\) and a compressive strength of 10 to 14 MPa, after burning in the temperature range from 1000 to 1100 \({}^{\circ}\)C.  
3. Regarding the influence of diatomite from the Utesai deposit, the following fractions were investigated: 2.5-1.25, 1.25-0.63, 0.63-0.315, and 0.315-0.16 mm, in the quantity of 15%. The optimal fraction was 0.315-0.16 mm, which allowed a sample with an average density of 1521 kg/m\({}^{3}\) and a compressive strength of 14.8 MPa to be obtained after firing at 1100 \({}^{\circ}\)C. After burning at 1150 \({}^{\circ}\)C, the samples had sintered porous dense tiles, and their compressive strength was 29.4 MPa. 4. It was found that the addition of bentonite, in general, reduced the strength and density of the samples. The optimal addition of bentonite is 15%, which decreased the average density and increased the compressive strength of the samples after burning at 1100 \({}^{\circ}\)C.  
5. It was found that the optimal additions of 15% diatomite and bentonite clay to clay loam allowed yo high-strength ceramic products to be obtained after burning at a temperature of 1170 \({}^{\circ}\)C. According to GOST 530-2012 \"Bricks and Ceramic Stone\", the samples correspond to the class 2 average density. In terms of the compressive strength, this corresponds to grades M 400 and M 500. In terms of the average density and compressive strength, ceramic samples meet the requirements for clinker bricks. 6. Using X-ray diffractometric analysis, it was established that augite prevails as the main crystalline phase in the samples obtained on the basis of loam with the addition of diatomite. In the sample with the addition of bentonite clay, the predominant phase is quartz. Anorthite is present in small amounts in all samples. Diatomite additives contribute to the formation of a large amount of augite in the composition of the products, which leads to higher strength indicators. 7. The study of the structure of the samples after burning confirmed the presence of a significant number of pores. In this case, the structure of the sample based on loam without additives is characterized by large pore sizes and a small amount of the glass phase. The addition of diatomite leads to the formation of a greater glass phase and a decrease in the pore size. The structure of the sample with bentonite shows the presence of a smaller glass phase compared to the samples with the addition of diatomite. Conceptualization, R.E.N. and Z.O.Z. ; methodology, Z.O.Z. and Y.S.O. ; software, A.A.M. ; validation, A.A.J., Z.O.Z. and R.E.N. ; formal analysis, M.T.Z. and Y.S.O. ; investigation, M.T.Z. and R.E.N. ; resources, R.E.N. ; data curation, R.E.N. and A.A.J. ; writing--original draft preparation, Z.O.Z. ; writings--Z.O.Z. and M.T.Z. ; visualization, R.E.N. and A.A.M. ; supervision, R.E.N. ; project administration, R.E.N. ; funding acquisition, R.E.N. All authors have read and agreed to the published version of the manuscript. **Funding:** This research is funded by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan and was done as part of the project AP09058365 \"Development of technology for high-strength clinker and energy-efficient ceramic wall products from clay and opal-cristobalite rocks\" in the framework of \"Grant funding for young scientists for scientific and (or) scientific and technical projects for 2021-2023\". **Institutional Review Board Statement:** Not applicable. **Informed Consent Statement:** Not applicable.