Engineering and Technology
| Open Access |
DOI: Effect of Ore and Finely Dispersed Fractions of Wollastonite From the Koytash Deposit on The Structure and Strength of Non-Autoclaved Foam Concrete
Allanazar Ilyasov , Professor at Karakalpak State University, Doctor of Technical Sciences (DSc), Uzbekistan Javlon Xamrayev , Independent Researcher at Karakalpak State University, Uzbekistan Timur Begjanov , Student of Karakalpak State University, UzbekistanAbstract
The article investigates the possibility of using ore and finely dispersed fractions of Koytash wollastonite from the Jizzakh region as a structure-modifying additive in non-autoclaved cement–fly ash foam concrete. The objective of the study was to determine the effect of the fractional state and dosage of wollastonite on the aggregative stability of the mix, the density of interpore partitions, compressive strength, and thermal conductivity. Compared with the control composition, the ore fraction was found to reduce the settlement of the mix from 14 mm to 9–11 mm, while the finely dispersed fraction reduced it to the range of 6–8 mm. When 1.0–1.5% finely dispersed wollastonite was used, the 28-day compressive strength increased from 1.30 MPa to 1.78–1.92 MPa, and the 90-day strength increased to 2.05–2.25 MPa. At the same time, the thermal conductivity coefficient decreased from 0.135 to 0.128–0.130 W/(m·°C). The results were explained by the role of wollastonite as a microfiller, a nucleation center, and a factor promoting the densification of interpore partitions.
Keywords
Non-autoclaved foam concrete, ore fraction, finely dispersed fraction
References
Adilxodjaev A.I., Shaumarov S.S., Shchipacheva E.V. Неавтоклавный ячеистый бетон на основе композиционных вяжущих. – Ташкент: Fan va texnologiyalar, 2019. – 176 с.
Ashirov M.B. Ko‘ytosh volastonit rudalari: tarkibi, xossalari va qo‘llash istiqbollari. – Toshkent: Fan, 2019. – 184 b.
Nigmatov U.J., Otajonov O.A. Mahalliy uchirma kul asosida yacheykali betonlarning issiqlik-fizik xossalari // Qurilish materiallari va konstruksiyalar. – 2021. – №3. – B. 22–28.
Rahmonov N.E. Mahalliy sintetik ko‘pik hosil qiluvchilar asosida avtoklavsiz ko‘pikbeton olish texnologiyasi // Kimyo va qurilish texnologiyasi. – 2020. – №2. – B. 41–47.
Tikhomirov V.K. Пены. Теория и практика их получения и разрушения. – М.: Химия, 1983. – 264 с.
Montgomery D.C. Design and Analysis of Experiments. – 8th ed. – Hoboken: Wiley, 2013. – 730 p.
Wan K., Li G., Wang S., Pang C. 3D full field study of drying shrinkage of foam concrete // Cement and Concrete Composites. – 2017. – Vol. 82. – P. 217–226.
Pukharenko Yu.V., Khazheeva T.A., et al. Cellular concretes: structure formation and performance control // Construction Materials. – 2018. – No. 4. – P. 15–21.
Download and View Statistics
Copyright License
Copyright (c) 2026 Allanazar Ilyasov, Javlon Xamrayev, Timur Begjanov
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors retain the copyright of their manuscripts, and all Open Access articles are disseminated under the terms of the Creative Commons Attribution License 4.0 (CC-BY), which licenses unrestricted use, distribution, and reproduction in any medium, provided that the original work is appropriately cited. The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.